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1. Electromagnetic design of superconducting dipoles based on sector coils

Author

L. Rossi and Ezio Todesco

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

We study the coil layouts of superconducting dipoles for particle accelerators based on the sector geometry. We show that a simple model based on a sector coil with a wedge allows us to derive an equation giving the short sample field as a function of the aperture, coil width, cable properties, and superconducting material. The equation agrees well with the actual results of several dipole coils that have been built in the past 30 years. The improvements due to the grading technique and the iron yoke are also studied. The proposed equation can be used as a benchmark to judge the efficiency of the coil design, and to carry out a global optimization of an accelerator layout.

Published
2007
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2. Field quality in low-β superconducting quadrupoles and impact on the beam dynamics for the Large Hadron Collider upgrade

Author

Boris Bellesia, Jean-Pierre Koutchouk, and Ezio Todesco

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

A possible scenario for the luminosity upgrade of the Large Hadron Collider is based on large aperture quadrupoles to lower β^{*} in the interaction regions. Here we analyze the measurements relative to the field quality of the RHIC and LHC superconducting quadrupoles to find out the dependence of field errors on the size of the magnet aperture. Data are interpreted in the framework of a Monte Carlo analysis giving the reproducibility in the coil positioning reached in each production. We show that this precision is likely to be independent of the magnet aperture. Using this result, we can carry out an estimate of the impact of the field quality on the beam dynamics for the collision optics.

Published
2007
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4. The MBRD Dipoles for the Luminosity Upgrade at the LHC: From Prototype Tests to the Series Production

Author

Stefania Farinon, Silvano Angius, Alberto Barutti, Andrea Bersani, Barbara Caiffi, Pasquale Fabbricatore, Lucio Fiscarelli, Arnaud Foussat, Michael Guinchard, Filippo Levi, Franco Mangiarotti, Gaelle Ninet, Daniel Novelli, Alessandra Pampaloni, Ezio Todesco, Nico Valle, Alessio Verardo, and Gerard Willering

Subjects
Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Published
2023

5. Status of the MQXFB Nb3Sn Quadrupoles for the HL-LHC

Author

Susana Izquierdo Bermudez, Giorgio Ambrosio, Giorgio Apollinari, Amalia Ballarino, Christian Barth, Mickael Denis Crouvizier, Delio Duarte Ramos, Arnaud Devred, Sandor Feher, Helene Felice, Paolo Ferracin, Jose Ferradas Troitino, Michael Guinchard, Nicholas Lusa, Franco Mangiarotti, Attilio Milanese, Alice Moros, Herve Prin, Stephan Russenschuck, Stefano Sgobba, Ezio Todesco, and Gerard Willering

Subjects
Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Published
2023

6. Protection Scheme Effectiveness Study for the High-Luminosity LHC MBRD Magnet

Author

Barbara Caiffi, Lennard Bender, Andrea Bersani, Stefania Farinon, Arnaud Foussat, Filippo Levi, Franco Mangiarotti, Riccardo Musenich, Daniel Novelli, Alessandra Pampaloni, Emmanuele Ravaioli, Ezio Todesco, and Gerard Willering

Subjects
Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Published
2023

7. Fine Tuning of the Inner Dipole Design of MCBXF Magnets

Author

Jesus A. Garcia-Matos, Cristobal Alcazar, Manuel Dominguez, Oscar Duran Lucas, Luis Garcia-Tabares, Luis Antonio Gonzalez Gomez, Pablo Gomez, Jesus Jimenez, Teresa Martinez, Carla Martins Jardim, Jose A. Pardo, Jose M. Perez, Pablo Sobrino, Fernando Toral, Juan C. Perez, and Ezio Todesco

Subjects
Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Published
2022

8. A Metallurgical Inspection Method to Assess the Damage in Performance-Limiting Nb3Sn Accelerator Magnet Coils

Author

Alice Moros, Mickael Denis Crouvizier, Ignacio Aviles Santillana, Stefano Sgobba, Susana Izquierdo Bermudez, Nicholas Lusa, Jose Ferradas Troitino, Attilio Milanese, Ezio Todesco, Arnaud Devred, Giorgio Ambrosio, Maria Baldini, Paolo Ferracin, Jesse Schmalzle, and Giorgio Vallone

Subjects
Accelerator Physics (physics.acc-ph), FOS: Physical sciences, Physics - Accelerator Physics, Electrical and Electronic Engineering, Condensed Matter Physics, Accelerators and Storage Rings, Electronic, Optical and Magnetic Materials, physics.acc-ph
Abstract

The design and production of Nb3Sn-based dipole and quadrupole magnets is critical for the realization of the High-Luminosity Large Hadron Collider (HL-LHC) at the European Organization for Nuclear Research (CERN). Nb3Sn superconducting coils are aimed at enhancing the bending and focusing strengths of accelerator magnets for HL-LHC and beyond. Due to the brittle nature of Nb3Sn, the coil fabrication steps are very challenging and require very careful QA/QC. Flaws in the Nb3Sn filaments may lead to quenches, and eventually, performance limitation below nominal during magnet testing. A novel inspection method, including advanced non-destructive and destructive techniques, was developed to explore the root-causes of quenches occurring in performance-limiting coils. The most relevant results obtained for MQXF coils through this innovative inspection method are presented. This approach allows for precise assessment of the physical events associated to the quenches experienced b y magnet coils, mainly occurring under the form of damaged strands with transversely broken sub-elements. Coil-slice preparation, micro-optical observations of transverse and longitudinal cross-sections, and a deep etching technique of copper will be illustrated in the present work, with a focus on the results achieved for a CERN coil from a non-conforming quadrupole magnet prototype, and two coils fabricated in the US, in the framework of the Accelerator Upgrade Project (AUP) collaboration, from two different non-conforming quadrupole magnets, respectively. The results obtained through the proposed inspection method will be illustrated., Applied Superconductivity Conference 2022

Published
2022

9. Study of the Heater-Coil Electrical Insulation for the HL-LHC Low Beta Quadrupoles

Author

S. Krave, Maria Baldini, Alfred Nobrega, M. Yu, Daniele Turrioni, Giorgio Ambrosio, Vittorio Marinozzi, Susana Izquierdo Bermudez, Marcellus Parker, Ezio Todesco, Joseph Muratore, and Paolo Ferracin

Subjects
Large Hadron Collider, Materials science, Physics::Medical Physics, Thermal contact, High voltage, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Computer Science::Other, Electronic, Optical and Magnetic Materials, Electromagnetic coil, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, Composite material, 010306 general physics, Short circuit, Heater core
Abstract

In the framework of the HL-LHC project, the present LHC low-β superconducting quadrupoles will be substituted with higher performance Nb3Sn magnets (MQXF) with 11.4 T coil peak field. MQXF coils are impregnated with epoxy resin to reduce risk of stress concentration on the brittle conductor. The magnet quench protection is provided by CLIQ and quench heaters to ensure a redundant system. Quench heaters are impregnated with the coils in order to have suitable thermal contact with them, and to prevent the hot spot temperature from exceeding 350K during normal operation in case of a quench. Quench heaters are insulated from the coil by S-2 Glass and polyimide. The test of the first MQXF prototype (4 m long) MQXFAP1 was stopped by a coil-to-ground short circuit triggered by a heater-to-coil short. This issue triggered a root analysis of the causes of this short. Here we prove that the use of a non-conforming cloth in coil impregnation, further weakened by non-conforming high voltage test, has triggered the shorts. Moreover, we present an analysis of the heater-to-coil insulation strength, showing the role of blistering phenomena and how they are triggered by a combination of magnet powering and heater firing.

Published
2021

10. Assembly and Warm Magnetic Measurement of MQYYM: A 90 mm NbTi Quadrupole Magnet Option for HL-LHC

Author

Carlo Petrone, M. Segreti, J. C. Perez, Lucio Fiscarelli, Ezio Todesco, R. Godon, J.M. Gheller, D. Simon, R. Correia Machado, Arnaud Foussat, S. Emami Naini, Simon Perraud, Gilles Minier, J. M. Rifflet, H. Felice, D. Bouziat, Michael Guinchard, Arnaud Madur, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
superconducting accelerator magnet, magnet: design, NbTi, Physics::Instrumentation and Detectors, Aperture, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Nuclear engineering, fabrication, Superconducting magnet, Stress, LHC luminosity upgrade, 01 natural sciences, Temperature measurement, Strain, Apertures, Superconducting magnets, 0103 physical sciences, quadrupole, luminosity: upgrade, niobium: titanium, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet, Physics, Magnetic variables measurement, Large Hadron Collider, magnet: superconductivity, Condensed Matter Physics, quadrupole lens, Electronic, Optical and Magnetic Materials, CERN LHC Coll, Cold test, Magnet, Quadrupole, Physics::Accelerator Physics, Magnetomechanical effects, performance
Abstract

International audience; In the framework of the HL-LHC project, a NbTi double aperture quadrupole magnet MQYY is being developed as an option to replace the LHC magnet MQY. This 90 mm double aperture cos-2θ quadrupole has an operating gradient of 120 T/m at 1.9 K. To demonstrate the validity of the design, a single aperture short model of 1.2 m called MQYYM has been developed. Designed by CEA and manufactured in collaboration with CERN, the MQYYM magnet is being prepared for cold test at CEA in a dedicated cryogenic station with LHe bath at 1 bar 4.2 K and 23 mbar 1.9 K. First, this paper will summarize the initial and as-built magnet designs based on the assembly at CERN. Second, updated mechanical measurements of collaring and axial pre-loading will be presented. Finally warm magnetic measurements performed at CERN during the assembly and at CEA during test preparation will be detailed.

Published
2021

11. Completion of the Test Phase for the Hilumi LHC Skew Quadrupole Corrector Magnet

Author

Ezio Todesco, Marco Campaniello, Massimo Sorbi, D. Pedrini, Marco Canetti, C Santini, Andrea Musso, A. Palmisano, Alessandro Pasini, Antonio Paccalini, Marco Prioli, L. Imeri, Samuele Mariotto, Fabrizio Gangini, Alessandro Zanichelli, M. Statera, Augusto Leone, Carlo Uva, Riccardo Valente, Maurizio Todero, E. De Matteis, Paolo Manini, and F. Broggi

Subjects
Large Hadron Collider, business.industry, Computer science, Skew, Phase (waves), Mechanical engineering, superferric design, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Magnet, electrical fault, mechanical design, 0103 physical sciences, Quadrupole, high - luminosity LHC, Accelerator corrector magnets, Electrical and Electronic Engineering, 010306 general physics, business, Root cause analysis, Quality assurance
Abstract

In the family of the High-Luminosity LHC high order correctors, the skew quadrupole was the most critical magnet as three assemblies with different solutions were needed to meet the design specifications. This paper summarizes the prototyping phase of the magnet, discussing the observed nonconformities, the subsequent root cause analyses, and the adopted solutions. A first-hand experience showed us the importance of adopting rigorous quality assurance methods for the electrical insulation, aimed at the early defect detection, and implementing a consistent measurement-to-simulations chain for the optimization of the coils mechanical support. The improvements discussed in the paper are integrated into the final magnet design for the series production of six skew quadrupole correctors.

Published
2021

12. The Development of the Superconducting Dipoles D2 for the High Luminosity Upgrade of LHC

Author

Barbara Caiffi, Andrea Bersani, Roberto Cereseto, Filippo Levi, Salvador Ferradas Troitino, Franco Mangiarotti, Arnaud Foussat, Ezio Todesco, Lucio Fiscarelli, Alessandra Pampaloni, Pasquale Fabbricatore, Stefania Farinon, and Gerard Willering

Subjects
Superconductivity, Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, business.industry, Aperture, Magnetic separation, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Dipole, medicine.anatomical_structure, Atlas (anatomy), Magnet, 0103 physical sciences, medicine, Electrical and Electronic Engineering, Aerospace engineering, 010306 general physics, business
Abstract

The recombination dipoles D2 (MBRD) for the luminosity upgrade of the Large Hadron Collider (LHC) are double aperture magnets to be placed on each side of ATLAS and CMS experiments, generating 4.5 T along a magnetic length of 7.78 m and a bore diameter of 105 mm. Its development plan foresees the construction of a short model 1.6 m long, followed by a prototype and by the series of 6 magnets. The magnet design was carried out at INFN Genova in a collaboration framework with CERN and the construction is ongoing in the industry (ASG Superconductors, Italy). The short model activities have just been accomplished after a successful power test performed at CERN, while the prototype is in its construction phase. In this contribution, the main features of the D2 magnet will be described, underlining the improvements implemented in the prototype with respect to the short model design. Then, the main results of the power test will be presented, focusing on training performance, protection scheme effectiveness and magnetic measurements.

Published
2021

13. Powering Performance and Endurance Beyond Design Limits of HL-LHC Low-Beta Quadrupole Model Magnets

Author

Emmanuele Ravaioli, Gerard Willering, Susana Izquierdo Bermudez, Franco Mangiarotti, Luca Bottura, Paolo Ferracin, E. Takala, Jose Ferradas Troitino, Marta Bajko, J. Feuvrier, Salvador Ferradas Troitino, Gyopar Elekes, Vincent Desbiolles, Ezio Todesco, Michal Duda, and Juan Carlos Perez

Subjects
Physics, Large Hadron Collider, Field (physics), Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Nuclear physics, Beta (plasma physics), Magnet, 0103 physical sciences, Quadrupole, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet, Electrical conductor
Abstract

For the High Luminosity Upgrade project (HL-LHC) of the CERN Large Hadron Collider (LHC), lower $\beta$ * quadrupole magnets based on advanced Nb $_\text{3}$ Sn conductors will be installed on each side of the ATLAS and CMS interaction points. To quantify the endurance and technological limits of these magnets, beyond their maximum operational conditions, two short length model magnets have been extensively tested at the CERN SM18 test facility. Both magnets were subjected to eight thermal cycles. One of them was trained beyond its ultimate current (17.89 kA, corresponding to 143 T/m field gradient and 12.2 T peak field), reaching a maximum of 19.57 kA at 1.9 K (corresponding to 155 T/m, 13.4 T peak field and 95.4% of the short sample limit) in a 150 mm diameter bore. This magnet currently has the record highest field gradient of this quadrupole magnet class. The second short model had zero re-training quenches up to nominal (16.47 kA) and ultimate current at 1.9 K during the thermal cycles; more than 1000 current cycles to nominal current; and provoked quenches to simulate the most severe failure scenarios of the protection system. After all these tests, both magnets continue to perform beyond requirements for operating current and temperature. In this paper, the tests performed on the two magnets are discussed.

Published
2021

14. Fabrication and Power Test of the Second MCBXFB Nested Orbit Corrector Prototype for HL-LHC

Author

Ezio Todesco, Carla Martins Jardim, Nicolas Bourcey, Pablo Sobrino, Jesus A. Garcia-Matos, Jose M. Perez, Luis Garcia-Tabares, Fernando Toral, Michael Guinchard, Gerard Willering, Javier Munilla, Marta Bajko, Jose A. Pardo, Pablo Gomez, Alejandro Fernandez, Juan Carlos Perez, Salvador Ferradas, Lucio Fiscarelli, Manuel Domínguez, Teresa Martinez, and J. Calero

Subjects
Large Hadron Collider, Fabrication, Physics::Instrumentation and Detectors, Computer science, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Upgrade, Power test, Magnet, 0103 physical sciences, Orbit (dynamics), Torque, Electrical and Electronic Engineering, 010306 general physics, Simulation
Abstract

The second prototype of the MCBXFB nested orbit corrector for the upgrade of the LHC has been manufactured at CIEMAT and assembled at CERN, in the framework of the HL-LHC project. This paper describes the changes introduced with respect to the first prototype in order to test some design improvements intended for the series magnets. The preload of the coils has been carefully studied, aiming to improve the performance in combined operation. A power test campaign has been carried out for this second prototype at CERN. Both dipoles reached ultimate current without any quench when individually powered. However, the results in combined operation did not improve those of the first prototype. Further analysis and studies are ongoing.

Published
2021

15. Performance of a MQXF Nb$_3$Sn Quadrupole Magnet Under Different Stress Level

Author

Susana Izquierdo Bermudez, Giorgio Ambrosio, Bernardo Bordini, Nicolas Bourcey, Arnaud Devred, Paolo Ferracin, Jose Ferradas Troitino, Salvador Ferradas Troitino, Lucio Fiscarelli, Jerome Fleiter, Michael Guinchard, Franco Mangiarotti, Juan Carlos Perez, Eelis Takala, and Ezio Todesco

Subjects
musculoskeletal, neural, and ocular physiology, FOS: Physical sciences, Physics - Applied Physics, Applied Physics (physics.app-ph), Electrical and Electronic Engineering, Condensed Matter Physics, Physics::Classical Physics, physics.app-ph, human activities, Electronic, Optical and Magnetic Materials, Particle Physics - Phenomenology
Abstract

In a dipole or in a quadrupole accelerator magnet, the displacement of the coil turns induced by the electromagnetic forces can cause quenches limiting the magnet performance. For this reason, an azimuthal preload is applied to avoid azimuthal movements of the coil up to the required operational current. However, several tests showed that accelerator magnets can operate with a partial preload, i.e., that coil unloading during the ramp does not prevent reaching higher currents. This issue is particularly relevant for Nb 3 Sn magnets, where the loads applied to the Nb 3 Sn filaments can reach the degradation limits of critical current. In order to investigate the impact of coil preload on the quench performance, the MQXFS6 short model quadrupole for the High Luminosity Upgrade was tested under an azimuthal pre-load at 80% of the short sample current, reaching 93% of short sample current at 1.9 K. The preload was then released to 60%, still showing ability to operate in the range of 80--85% of short sample current as required by HL-LHC project. With this lower preload, the ability of going above 90% of short sample was lost, and a significant training appeared above 85%. When the preload was restored to the original 80% value, the magnet reached with few quenches 95% of short sample (13.4 T peak field). Magnetic measurements confirm the larger movement of the coil in the case with lower preload, and agree with finite element simulations. In a dipole or in a quadrupole accelerator magnet, the displacement of the coil turns induced by the electromagnetic forces can cause quenches limiting the magnet performance. For this reason, an azimuthal preload is applied to avoid azimuthal movements of the coil up to the required operational current. However, several tests showed that accelerator magnets can operate with a partial preload, i.e. that coil unloading during the ramp does not prevent reaching higher currents. This issue is particularly relevant for Nb$_3$Sn magnets, where the loads applied to the Nb$_3$Sn filaments can reach the degradation limits of critical current. In order to investigate the impact of coil preload on the quench performance, the MQXFS6 short model quadrupole for the High Luminosity Upgrade was tested under an azimuthal preload at 80% of the short sample current, reaching 93% of short sample current at 1.9 K. The preload was then released to 60%, still showing ability to operate in the range of 80-85% of short sample current as required by HL-LHC project. With this lower preload, the ability of going above 90% of short sample was lost, and a significant training appeared above 85%. When the preload was restored to the original 80% value, the magnet reached with few quenches 95% of short sample (13.4 T peak field). Magnetic measurements confirm the larger movement of the coil in the case with lower preload, and agree with finite element simulations. In a dipole or in a quadrupole accelerator magnet, the displacement of the coil turns induced by the electromagnetic forces can cause quenches limiting the magnet performance. For this reason, an azimuthal preload is applied to avoid azimuthal movements of the coil up to the required operational current. However, several tests showed that accelerator magnets can operate with a partial preload, i.e. that coil unloading during the ramp does not prevent reaching higher currents. This issue is particularly relevant for Nb$_3$Sn magnets, where the loads applied to the Nb$_3$Sn filaments can reach the degradation limits of critical current. In order to investigate the impact of coil preload on the quench performance, the MQXFS6 short model quadrupole for the High Luminosity Upgrade was tested under an azimuthal preload at 80% of the short sample current, reaching 93% of short sample current at 1.9 K. The preload was then released to 60%, still showing ability to operate in the range of 80-85% of short sample current as required by HL-LHC project. With this lower preload, the ability of going above 90% of short sample was lost, and a significant training appeared above 85%. When the preload was restored to the original 80% value, the magnet reached with few quenches 95% of short sample (13.4 T peak field). Magnetic measurements confirm the larger movement of the coil in the case with lower preload, and agree with finite element simulations.

Published
2022

16. Mechanical Analysis and Assembly of MQYYM: A 90 mm NbTi Quadrupole Magnet Option for HL-LHC

Author

Etienne Rochepault, Gilles Minier, J. M. Rifflet, S. Ferradas Troitino, S. Emami Naini, Simon Perraud, Damien Simon, Juan Carlos Perez, Michael Guinchard, Arnaud Foussat, Patrick Graffin, Ezio Todesco, H. Felice, Randy Ollier, and M. Segreti

Subjects
Fabrication, Materials science, Large Hadron Collider, Physics::Instrumentation and Detectors, business.industry, Aperture, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Optics, Electromagnetic coil, Magnet, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet, business
Abstract

For the HL-LHC project, a 90 mm double aperture NbTi quadrupole magnet is being developed as an option to replace the 70 mm aperture LHC quadrupole MQY. This cos2θ magnet has an operating gradient of 120 T/m at 1.9 K and a magnetic length of 3.67 m. A single aperture short model magnet with a magnetic length of 1.2 m has been designed at CEA and is being manufactured in collaboration with CERN. The magnet support structure is relying on self-supporting collars. We present here the mechanical analysis along with the assembly of the short model magnet from coil fabrication and mechanical characterization to collaring and yoking.

Published
2020

17. Test of the First Full-Length Prototype of the HL-LHC D2 Orbit Corrector Based on Canted Cosine Theta Technology

Author

Ezio Todesco, K. Pepitone, Dominic Coll, J. Mazet, Jeroen van Nugteren, Glyn Kirby, Francois-O. Pincot, Gerard Willering, Jean-Luc Guyon, J. Robertson, Gijs de Rijk, Juan Carlos Perez, Franco Mangiarotti, Matthias Mentink, Marta Bajko, Lucio Fiscarelli, J. Feuvrier, Jens Steckert, Michal Duda, and Vincent Desbiolles

Subjects
Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, business.industry, Aperture, Context (language use), Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Dipole, Optics, Magnet, 0103 physical sciences, Orbit (dynamics), Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, business, Beam (structure)
Abstract

In the context of CERN's high-luminosity upgrade project (HL-LHC) for the Large Hadron Collider (LHC), a new double aperture beam orbit corrector magnets will be installed near the recombination dipole (D2). These 2.2 m long NbTi dipoles are built with the canted cosine theta (CCT) technique. The two independently powered apertures are oriented such that their field vectors are perpendicular to each other and to the direction of the beams. A full-length double aperture prototype was built and tested at CERN in the SM18 test facility. Here we present the results of powering tests at 1.9 and 4.5 K: training of each aperture, magnetic field quality and cross-talk effects, quench detection system effectiveness, quench protection performance and quench-back with several energy extraction systems.

Published
2020

18. Construction and Power Test of the Superferric Skew Quadrupole for HL-LHC

Author

Massimo Sorbi, Antonio Paccalini, F. Alessandria, Carlo Uva, Alessandro Zanichelli, Ezio Todesco, Marco Campaniello, Marco Statera, Marco Canetti, F. Broggi, Mauro Quadrio, Andrea Musso, Giovanni Bellomo, Marco Prioli, Fabrizio Gangini, Augusto Leone, Alessandro Pasini, Paolo Manini, Samuele Mariotto, D. Pedrini, Riccardo Valente, and Maurizio Todero

Subjects
superferric magnets, Large Hadron Collider, Accelerator magnets, Physics::Instrumentation and Detectors, business.industry, Computer science, Nuclear engineering, Skew, Modular design, corrector magnets, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Power test, Magnet, Quadrupole, Mechanical design, Physics::Accelerator Physics, Electrical and Electronic Engineering, High order, business
Abstract

INFN is developing at LASA laboratory (Milano, Italy) the prototypes of five high order corrector magnets, from skew quadrupole to dodecapole, which will equip the high-luminosity interaction regions of the High Luminosity-LHC (HL-LHC). These magnets are based on a superferric design, which allows a relatively simple, modular and easy to construct magnet. This activity takes place within the framework of a collaboration agreement between CERN and INFN. Four prototypes, from sextupole to dodecapole, have been built and tested starting in 2016. We present here the last prototype of the high order correctors, to be installed in LHC, the skew quadrupole: magnetic and mechanical design are discussed together with quench protection. We report also on the overall experience gained during construction aiming toward the series production. The power test of the quadrupole, including the training, the qualification and the quench behavior in operational conditions are also described.

Published
2020

19. Magnetic Field Design of a Full-Scale Prototype of the HL-LHC Beam Separation Dipole With Geometrical and Iron-Saturation Corrections

Author

Hiroshi Kawamata, Ezio Todesco, Ryutaro Okada, Kento Suzuki, Hirokatsu Ohata, Naoto Takahashi, Ken-ichi Sasaki, Norio Higashi, Kenichi Tanaka, Toru Ogitsu, Andrea Musso, Tatsushi Nakamoto, Nobuhiro Kimura, Naoki Okada, Hiroshi Ikeda, M. Iida, Michinaka Sugano, and Y. Ikemoto

Subjects
Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, High Luminosity Large Hadron Collider, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Magnetic field, Nuclear physics, Cross section (physics), Dipole, Electromagnetic coil, Magnet, Physics::Accelerator Physics, High Energy Physics::Experiment, Electrical and Electronic Engineering, Beam (structure)
Abstract

High Energy Research Organization (KEK) has developed three short-scale model magnets of the beam separation dipole, MBXF, which is to be installed for the High Luminosity Large Hadron Collider, HL-LHC, in CERN. We will soon undertake production of a prototype of MBXF and its magnetic design has to be finalized before the fabrication. We established a strategy for designing the new coil cross section by taking into account different error sources for its field quality. In this paper, focused on b 3 , we describe how the final b 3 integral, which should be within 2.9 units according to the acceptance criteria, is achievable.

Published
2020

20. Improvement in Training Performance by Enhancing Coil Mechanical Support in the Beam Separation Dipole Model Magnet for the HL-LHC Upgrade

Author

Ezio Todesco, Naoto Takahashi, Hiroshi Kawamata, Hiroshi Ikeda, Hirokatsu Ohhata, Kenichi Tanaka, Kento Suzuki, Andrea Musso, Michinaka Sugano, Norio Higashi, Y. Ikemoto, Nobuhiro Kimura, Naoki Okada, Ken-ichi Sasaki, M. Iida, Toru Ogitsu, Tatsushi Nakamoto, and Ryutaro Okada

Subjects
Physics, Field (physics), Physics::Instrumentation and Detectors, Aperture, Mechanical engineering, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, symbols.namesake, Dipole, Electromagnetic coil, Magnet, 0103 physical sciences, symbols, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, Magnetic dipole, Lorentz force, Beam (structure)
Abstract

Nb-Ti based large-aperture beam separation dipoles (MBXFs) will be installed on both sides of two interaction points, ATLAS and CMS, for the high-luminosity LHC upgrade. The most important requirements for MBXF is a coil aperture of 150 mm and the field integral of 35 T⋅m. Nominal dipole field is 5.6 T at 12 kA and 1.9 K. KEK is in charge of developing MBXF within a framework of CERN-KEK collaboration. This study reports training performance of three 2-m long model magnets (MBXFS1–3) assembled under different mechanical support conditions. Azimuthal pre-stress both in the straight section and at coil end, and axial pre-load were controlled to counteract Lorentz force. In MBXFS2 and 3, wet-winding was also applied but solely to the coil end. Quench start locations for the model magnets are compared to validate the effectiveness of each support method.

Published
2020

21. Power Tests of the First Nested Orbit Corrector Prototype for HL-LHC

Author

D. López, Fernando Toral, Gerard Willering, Javier Munilla, Teresa Martinez, Jose M. Perez, Franco Mangiarotti, Luis Garcia-Tabares, Pablo Sobrino, Luis Miguel Martinez, Manuel Dominguez, Jose A. Pardo, J. Calero, Marta Bajko, Susana Izquierdo Bermudez, Ezio Todesco, Jesus A. Garcia-Matos, Sohrab Emami, Juan Carlos Perez, Lucio Fiscarelli, Alejandro Fernandez, Michael Guinchard, and Pablo Gomez

Subjects
Physics, Rutherford cable, Large Hadron Collider, Aperture, Mechanical engineering, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Electromagnetic coil, Magnet, 0103 physical sciences, Torque, Electrical and Electronic Engineering, 010306 general physics, Yoke, Voltage
Abstract

The first prototype of the short orbit corrector for the upgrade of the LHC has been fabricated at CIEMAT, in collaboration with CERN, in the framework of the HL-LHC project. It consists of two nested dipoles, with an aperture of 150 mm and physical length of 1.5 m. A first power test was performed without the outer dipole coils, which were replaced by a support structure to align the iron yoke with the collared inner dipole. This test was aimed to validate the coil fabrication techniques, which are innovative for a NbTi Rutherford cable. In the power test of the full assembled magnet, individual training of both dipoles was fine to ultimate current. However, the magnet was not able to reach nominal torque in combined operation. Several power tests and re-assemblies were necessary to be able to power both dipoles till nominal current. This paper describes the test results and analysis of the measurements. The magnet is heavily instrumented with voltage taps, collars with strain gauges and bullet gauges at the axial pushers.

Published
2020

22. Performance of the Quench Protection Heater for the HL-LHC Beam Separation Dipole

Author

Kento Suzuki, Toru Ogitsu, Ken-ichi Sasaki, Naoto Takahashi, Hiroshi Kawamata, Ezio Todesco, Ryutaro Okada, Nobuhiro Kimura, Hiroshi Ikeda, Norio Higashi, Kenichi Tanaka, Hirokatsu Ohata, M. Iida, Andrea Musso, Tatsushi Nakamoto, Naoki Okada, Michinaka Sugano, and Y. Ikemoto

Subjects
Materials science, Large Hadron Collider, Field (physics), Nuclear engineering, Separation (aeronautics), High Luminosity Large Hadron Collider, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Dipole, Cold test, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, Beam (structure)
Abstract

In collaboration with CERN, High Energy Accelerator Research Organization (KEK) has designed and developed short-scale model magnets of the beam separation dipole, MBXF, which will be installed for the High Luminosity Large Hadron Collider, HL-LHC. A new quench protection heater for MBXF was designed and tested during the cold test of the short-scale models. Combining data taken since the test of the 1st model magnet, we confirmed the maximum hotspot temperatures are well below 300 K in the case of the low field (1 T) and high field (5 T) quenches, respectively. In addition, a simulation model was developed and tuned with the obtained data for the full-scale prototype magnet. The hotspot temperature after quench initiation was then computed with the new heater circuit and found to be below 300 K even for the case of failure in firing the heater.

Published
2020

23. Test Results of the CERN HL-LHC Low- <tex-math notation='LaTeX'>$\beta$</tex-math> Quadrupole Short Models MQXFS3c and MQXFS4

Author

J. Fleiter, K. Pepitone, M. Yu, Alfred Nobrega, Michal Duda, Arnaud Devred, Giorgio Vallone, Jesse Schmalzle, Emmanuele Ravaioli, Ezio Todesco, Marta Bajko, Bernardo Bordini, A. Chiuchiolo, Lucio Fiscarelli, Susana Izquierdo Bermudez, Gerard Willering, Franco Mangiarotti, Vincent Desbiolles, Juan Carlos Perez, Hugues Bajas, Paolo Ferracin, Matthias Mentink, Nicolas Bourcey, J. Feuvrier, and Giorgio Ambrosio

Subjects
Physics, Large Hadron Collider, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Nuclear physics, Electromagnetic coil, Magnet, Beta (plasma physics), 0103 physical sciences, Quadrupole, Fermilab, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet, Compact Muon Solenoid
Abstract

Author(s): Mangiarotti, F; Bajas, H; Ambrosio, G; Bajko, M; Bordini, B; Bourcey, N; Duda, M; Desbiolles, V; Feuvrier, J; Fleiter, J; Bermudez, SI; Chiuchiolo, A; Devred, A; Ferracin, P; Fiscarelli, L; Mentink, M; Nobrega, A; Pepitone, K; Ravaioli, E; Schmalzle, J; Todesco, E; Perez, JC; Vallone, G; Willering, G; Yu, M | Abstract: For the high luminosity upgrade of the CERN large hadron collider, lower β∗ quadrupole magnets based on advanced Nb3Sn conductors will be installed on each side of the ATLAS and compact muon solenoid (CMS) experiment insertion zones. As part of the technological developments needed to achieve the required field gradient of 132.6 T/m within a 150-mm aperture, short length model magnets, named MQXFS, are tested both at the CERN SM18 and Fermilab test facilities. The model magnets rely on two types of Nb3Sn conductors (restack rod process (RRP) and powder-in-tube (PIT)) and on an innovative bladders and keys design to provide mechanical support against the Lorentz forces. In 2016 and 2017, the powering tests of the first two models MQXFS3 (RRP) and MQXFS5 (PIT) proved that nominal performance (16.5 kA) could be reached with excellent memory of the quench current after thermal cycle. However both magnets showed a slow training behavior with clear observations of voltage disturbances before the quench. Besides, only MQXFS5 could reach ultimate current (17.9 kA) whereas erratic behavior was observed on MQXFS3 due to conductor local degradation at the head of one of the coils. In 2018, this limiting coil was changed and the applied azimuthal prestress increased. While ultimate current could then be reached, no stable current could be maintained due to identified defect on the outer layer of the new coil. Finally the outcome of the test of the new model MQXFS4, featuring the final RRP conductors that will be used for the series production and variation on the inner layer quench heater designs are here reported in details.

Published
2019

24. Test of Short Model and Prototype of the HL-LHC D2 Orbit Corrector Based on CCT Technology

Author

Dominic Coll, Jens Steckert, J. Mazet, Jeroen van Nugteren, Vincent Desbiolles, K. Pepitone, Marta Bajko, Gerard Willering, J. Robertson, Lucio Fiscarelli, J. Feuvrier, Ezio Todesco, Franco Mangiarotti, Gijs de Rijk, Matthias Mentink, Francois-Olivier Pincot, Michal Duda, and Glyn Kirby

Subjects
Physics, Large Hadron Collider, business.industry, Aperture, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Dipole, Optics, Upgrade, Magnet, 0103 physical sciences, Orbit (dynamics), Perpendicular, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, business, Beam (structure)
Abstract

In the frame of the high-luminosity upgrade project for the large hadron collider, new twin aperture beam orbit corrector magnets will be installed near the recombination dipole (D2). These magnets are 2.2 m long canted cosine theta NbTi dipoles, with two independently powered apertures oriented such that their field vectors are perpendicular to each other and to the direction of the beams. A 0.5 m model magnet in single and double aperture configuration and a full-length double aperture prototype were built and tested at CERN. In this paper, the performance of these magnets at 1.9 K in terms of training behavior, quench detection and protection, and other tests is discussed. In addition, the thermal response of the magnet to a hypothetical beam discharge is simulated and analyzed.

Published
2019

25. The Superconducting Separation Dipoles MBRD for the High Luminosity Upgrade of LHC: From Short Model to Prototype

Author

Barbara Caiffi, Stefania Farinon, Ezio Todesco, T. Sahner, Oussama Id Bahmane, Andrea Bersani, Pasquale Fabbricatore, Roberto Cereseto, Filippo Levi, and Arnaud Foussat

Subjects
Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Aperture, Magnetic separation, Mechanical engineering, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Magnetic field, Dipole, Electromagnetic coil, Magnet, 0103 physical sciences, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics
Abstract

A new recombination dipole D2 for the luminosity upgrade of the Large Hadron Collider at CERN (LHC) is under development since 2016 at INFN in a collaboration framework with CERN. These twin aperture magnets will be installed on both sides of LHC main multipurpose experiments, ATLAS and CMS, interaction points. The target integral magnetic field in an aperture of 105 mm is 35 T m, obtained with a magnetic field of 4.5 T and a magnetic length of 7.78 m. The coils in both apertures are asymmetric for canceling the unwanted multipoles caused by the magnetic field cross-talk. The asymmetric design and the demanding requirements on the field quality made preferable an independent collaring, which allows for a more accurate assembly: the mechanical stability is ensured by a novel approach of coil integration in an Al-alloy mechanical structure. After a design phase, the construction of a short model has been planned followed by the construction of a full-length prototype. This contribution is focused on the aspects of the short model assembly and the implications on the prototype design in terms of mechanical tolerances, manufacturing processes, and materials involved in the construction.

Published
2019

26. Construction and Cold Test of the Superferric Decapole for the LHC Luminosity Upgrade

Author

Marco Statera, Maurizio Todero, Carlo Uva, Riccardo Valente, Paolo Fessia, Andrea Musso, Ezio Todesco, Franco Alessandria, Francesco Broggi, Augusto Leone, Samuele Mariotto, Antonio Paccalini, Danilo Pedrini, Mauro Quadrio, and Massimo Sorbi

Subjects
Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Published
2019

27. Magnetic Analysis of the MQXF Quadrupole for the High-Luminosity LHC

Author

Stoyan Stoynev, Lucio Fiscarelli, Hugues Bajas, Paolo Ferracin, GianLuca Sabbi, Joseph DiMarco, Ezio Todesco, Guram Chlachidze, Giorgio Vallone, Susana Izquierdo Bermudez, and Giorgio Ambrosio

Subjects
Physics, General Physics, Large Hadron Collider, Luminosity (scattering theory), Field (physics), Physics::Instrumentation and Detectors, field quality, Materials Engineering, Superconducting magnet, Condensed Matter Physics, Accelerators and Storage Rings, 01 natural sciences, Electronic, Optical and Magnetic Materials, Nuclear physics, magnetic measurements, Harmonics, Magnet, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, High luminosity LHC, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet, high field Nb3Sn magnet
Abstract

The high-luminosity upgrade of the large hadron collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). The US Hilumi-LHC Accelerator Upgrade (HL-LHC AUP) and CERN are jointly developing a 150 mm aperture Nb3Sn magnet. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging field quality targets at collision energy. Magnetic measurements have been performed both at ambient and cryogenic temperatures in the four short models built and tested. This paper presents the magnetic analysis, comparing field measurements with the expectations and the field quality requirements. The analysis is focused on the geometrical harmonics and iron saturation effect, including three dimensional effects and transfer function repeatability. Persistent currents and dynamic effects are also discussed. The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). The U.S. HiLumi-LHC Accelerator Upgrade and CERN are jointly developing a 150-mm aperture Nb3Sn magnet. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging field quality targets at collision energy. Magnetic measurements have been performed both at ambient and cryogenic temperatures in the four short models that were built and tested. This paper presents the magnetic analysis, comparing field measurements with the expectations and the field quality requirements. The analysis is focused on the geometrical harmonics and iron saturation effect, including three-dimensional effects and transfer function repeatability. Persistent currents and dynamic effects are also discussed.

Published
2019

28. Construction and Cold Test of the Superferric Dodecapole High Order Corrector for the LHC High Luminosity Upgrade

Author

Augusto Leone, Marco Statera, Marco Campaniello, Maurizio Todero, Carlo Uva, Samuele Mariotto, Andrea Musso, Ezio Todesco, Alessandro Zanichelli, Antonio Paccalini, Marco Canetti, Massimo Sorbi, Mauro Quadrio, F. Alessandria, D. Pedrini, Alessandro Pasini, F. Broggi, Riccardo Valente, Alessandro Fumagalli, Giovanni Bellomo, and Fabrizio Gangini

Subjects
Physics, Luminosity (scattering theory), Large Hadron Collider, Physics::Instrumentation and Detectors, Skew, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, law.invention, Nuclear physics, Dipole, Upgrade, law, Magnet, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, Collider
Abstract

The High Luminosity LHC (HL-LHC) is a program to upgrade the performance of the collider in order to achieve, in the ATLAS and CMS collision regions, instantaneous luminosities a factor of five larger than the actual nominal value. To obtain this result, all the magnets in the collision region will have to be substituted, together with other important devices. In the framework of this program, the Italian National Institute for Nuclear Physics (INFN-LASA laboratory) is entrusted to develop five corrector magnets (skew quadrupole, sextupole, octupole, decapole, and dodecapole), which in the magnet chain will have to correct the magnetic imperfections of the main magnets in the regions (low-beta quadrupoles Q1/Q3 and dipole D1/D2). These corrector magnets have been designed with relatively simple, robust, and easy to construct concepts, using superferric configuration. The first prototypes, a sextupole, an octupole, and a decapole, have been tested in 2016 and 2017. We present here the prototype of dodecapole. We report magnetic and mechanical designs and the experience during construction. The qualification, the cold test, and the quench behavior in operational conditions are also described.

Published
2019

29. Development of 2-m Model Magnet of the Beam Separation Dipole With New Iron Cross Section for the High-Luminosity LHC Upgrade

Author

Naoki Okada, Ken-ichi Sasaki, Kento Suzuki, Naoto Takahashi, Ezio Todesco, Kenichi Tanaka, Norio Higashi, M. Iida, Hirokatsu Ohhata, Tatsushi Nakamoto, Nobuhiro Kimura, Andrea Musso, Y. Ikemoto, Toru Ogitsu, Ryutaro Okada, Michinaka Sugano, Shun Enomoto, and Hiroshi Kawamata

Subjects
Physics, Large Hadron Collider, Mechanical engineering, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Cross section (physics), Electromagnetic coil, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet, Yoke, Beam (structure)
Abstract

Large aperture beam separation dipoles (D1 magnet) must be developed for the interaction regions in the high-luminosity large hadron collider (HL-LHC). The most important specifications of this magnet are a coil aperture of 150 mm and field integral of 35 Tm, which will be realized by Nb-Ti superconducting magnets operated at 12 kA at 1.9 K. High Energy Accelerator Research Organization (KEK) is developing 2-m-long model magnets for D1. The first model magnet was re-assembled after increasing the coil pre-stress (MBXFS1b); subsequently, it showed good training performance, achieving maximum quench current, which was higher than the ultimate current. However, mechanical support of the coils was still insufficient in MBXFS1b. Especially at coil end, some coil end blocks deformed toward the coil bore due to Lorentz force. In the second model magnet (MBXFS2), the change of iron yoke cross section was requested so that the position of heat exchanger holes penetrating iron yoke is in agreement with those of the final focusing Nb 3 Sn quadrupole magnets. Because this has a large impact on field quality, magnetic design including the magnet's cross section and coil end shape was updated. Some countermeasures were also taken to enhance mechanical support of the coil such as wet-winding with radiation-resistant resin at coil end and increase in coil pre-stress. This paper reports design update, fabrication, and training performance of MBXFS2 with new iron cross section.

Published
2019

30. Engineering Design and Fabrication of the Nested Orbit Corrector Prototype for HL-LHC

Author

Ezio Todesco, J. Calero, Alejandro Fernandez, Javier Munilla, Nicolas Bourcey, D. López, Jesus A. Garcia-Matos, Juan Carlos Perez, Pablo Sobrino, Jose A. Pardo, Pablo Gomez, Luis Garcia-Tabares Rodriguez, P. Abramian, and Fernando Toral

Subjects
Physics, Fabrication, Upgrade, Luminosity (scattering theory), Large Hadron Collider, Electromagnetic coil, Magnet, Orbit (dynamics), Mechanical engineering, Electrical and Electronic Engineering, Condensed Matter Physics, Clamping, Electronic, Optical and Magnetic Materials
Abstract

MCBXF magnets are nested orbit correctors, needed for the upgrade of the large hadron collider (LHC), in the framework of the high luminosity (HL) LHC project. There are two versions with different physical lengths, 1.5 and 2.5 m, which share the same cross section to decrease fabrication costs. These magnets have a large aperture of 150 mm and due to the high radiation dose, a mechanical clamping is necessary to hold the large torque between both dipoles. Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas CIEMAT is developing the short MCBXFB prototype in collaboration with CERN. This paper describes the engineering design of the magnet, which is based on previous magnetic and mechanical calculations. The axial pre-stress on the coil ends is analyzed in detail. Some innovative techniques have been developed for the coil fabrication because of the high number of turns and large aperture.

Published
2019

31. Test Result of the HL-LHC Beam Separation Dipole Model Magnet With the New Iron Cross Section

Author

K. Suzuki, Hiroshi Kawamata, Nobuhiro Kimura, M. Iida, Ryutaro Okada, Hirokatsu Ohata, Shun Enomoto, Andrea Musso, Michinaka Sugano, Naoki Okada, Y. Ikemoto, Tatsushi Nakamoto, Ezio Todesco, Norio Higashi, and Toru Ogitsu

Subjects
Physics, Large Hadron Collider, High Luminosity Large Hadron Collider, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Magnetic field, Nuclear physics, Cross section (physics), Dipole, Electromagnetic coil, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, Beam (structure)
Abstract

We report the test results of the second short model magnet of the beam separation dipole for the High Luminosity Large Hadron Collider. The test shows that the second model has a good training performance and is capable of operating at the ultimate current that corresponds to 108% of the nominal one. Magnetic field measurements reveal that b 3 is around 18 units, which is 15 units higher than the calculations. This can be explained in part by geometrical coil deformation caused during the construction process.

Published
2019

32. Assessment of MQXF Quench Heater Insulation Strength and Test of Modified Design

Author

S. Krave, Jesse Schmalzle, Vittorio Marinozzi, Ezio Todesco, M. Yu, Paolo Ferracin, Maria Baldini, Michael Anerella, Franco Mangiarotti, Stoyan Stoynev, R. Bossert, Giorgio Ambrosio, Alfred Nobrega, Susana Izquierdo Bermudez, and Charles Orozco

Subjects
Fabrication, Materials science, Nuclear engineering, High voltage, Superconducting magnet, STRIPS, Condensed Matter Physics, 01 natural sciences, Accelerators and Storage Rings, Electronic, Optical and Magnetic Materials, law.invention, law, Electromagnetic coil, Magnet, 0103 physical sciences, Breakdown voltage, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet
Abstract

The HL-LHC interaction region magnet triplets (Q1,Q2, and Q3) will be composed of superconducting Nb3Sn quadru-poles. The MQXF quadrupole protection system is based on CLIQ (Coupling-Loss Induced Quench system) and outer layer quench heaters.This paper reports a summary of quench heaters to coil high voltage tests performed on MQXF short and long coils in air after fabrication, and in air and He gas after magnet training. Breakdown voltage values demonstrate good marginwith respect to the Electrical design criteria for the HL-LHC inner triplet mag-nets. A modification in thequench heater installation-with an ex-tra layer of fiber glass between the coil and the quench heater trace-has been proposed and tested in a mirror magnet to further increase electrical margins. Results demonstrated improvements of high voltage margin at the expense of a clear increase of hot spot temperature.Thebaseline heater to coil insulation was assessed to be able to guarantee safe operation for the Nb3Sn quadrupole mag-nets for the interaction regions of HL-LHC. The HL-LHC interaction region magnet triplets (Q1, Q2, and Q3) will be composed of superconducting Nb3Sn quadrupoles. The MQXF quadrupole protection system is based on CLIQ (Coupling-Loss Induced Quench system) and outer layer quench heaters. This paper reports a summary of quench heaters to coil high voltage tests performed on MQXF short and long coils in air after fabrication, and in air and He gas after magnet training. Breakdown voltage values demonstrate good margin with respect to the Electrical design criteria for the HL-LHC inner triplet magnets. A modification in the quench heater installation- with an extra layer of fiber glass between the coil and the quench heater trace- has been proposed and tested in a mirror magnet to further increase electrical margins. Results demonstrated improvements of high voltage margin at the expense of a clear increase of hot spot temperature. The baseline heater to coil insulation was assessed to be able to guarantee safe operation for the Nb3Sn quadrupole magnets for the interaction regions of HL-LHC.

Published
2021

33. Lessons learned from the prototypes of the MQXFA Low Beta Quadrupoles for HL-LHC and status of production in the US

Author

Joseph DiMarco, Giorgio Ambrosio, Paolo Ferracin, Lance D. Cooley, Soren Prestemon, Giorgio Apollinari, Ezio Todesco, Jamie Blowers, Xiaorong Wang, Stoyan Stoynev, Joseph Muratore, Guram Chlachidze, S. Krave, Heng Pan, Giorgio Vallone, P. Joshi, Jeremy Levitan, Vittorio Marinozzi, Maxim Marchevsky, Jun Lu, S. Izquierdo Bermudez, R. Bossert, Kathleen Amm, Daniel W. Cheng, GianLuca Sabbi, Daniele Turrioni, V. Lombardo, P. Wanderer, Maria Baldini, Michael Anerella, T. Page, Emmanuele Ravaioli, Jesse Schmalzle, Marcellus Parker, E. Takala, I. Pong, M. Yu, Honghai Song, Sandor Feher, R. Carcagno, Thomas Strauss, and Alfred Nobrega

Subjects
Upgrade, Large Hadron Collider, Computer science, 0103 physical sciences, Systems engineering, Production (economics), Electrical and Electronic Engineering, 010306 general physics, Condensed Matter Physics, 01 natural sciences, Accelerators and Storage Rings, Electronic, Optical and Magnetic Materials
Abstract

With the successful test of the first two pre-series magnets the US HL-LHC Accelerator Upgrade Project has started production of the MQXFA magnets to be used in Q1/Q3 inner triplet elements of the HL-LHC. This good start comes after the test of two prototypes with limited performance, and it demonstrates the importance of learning from past issues. Therefore, in this paper we want to share the most important lessons learned so far, focusing on those which may be more interesting for similar projects. We will also present the status of MQXFA fabrication in the US.

Published
2021

34. Quench Protection Studies for the High Luminosity LHC Nb$_3$Sn Quadrupole Magnets

Author

Matthias Mentink, Jose Ferradas Troitino, Emmanuele Ravaioli, Franco Mangiarotti, Giorgio Ambrosio, F. Rodriguez-Mateos, Paolo Ferracin, Michal Duda, Daniel Wollmann, Ezio Todesco, Susana Izquierdo Bermudez, Vittorio Marinozzi, Hugues Bajas, and Arjan Verweij

Subjects
Large Hadron Collider, Materials science, Nuclear engineering, Superconducting magnet, Condensed Matter Physics, Accelerators and Storage Rings, Electronic, Optical and Magnetic Materials, Magnetic circuit, Electromagnetic coil, Magnet, Electrical and Electronic Engineering, Quadrupole magnet, Electrical conductor, Electronic circuit
Abstract

Achieving the targets of the High Luminosity LHC project requires the installation of new inner triplet magnet circuits for the final focusing of the particle beams on each side of the two main interaction points. Each of the four circuits will include six 150 mm aperture, 132.2 T/m gradient, Nb $_3$ Sn quadrupole magnets to be installed in the LHC tunnel. The recently updated circuit topology is such that the protection of each magnet can be studied from a single magnet point-of-view. To limit the hot-spot temperature and the peak voltage-to-ground, a protection system was designed that quickly and reliably transfers voluminous parts of the coil to the normal-conducting state, hence distributing more homogeneously the magnets stored energy in the windings. This system is based on two elements: quench heaters attached to the outer layers of the magnet coils and CLIQ (Coupling-Loss Induced Quench). The performance of the protection system is investigated by simulating the electro-magnetic and thermal transients occurring after a quench with the program STEAM-LEDET, and by conducting dedicated experiments at the CERN and FNAL magnet test facilities. The effectiveness of the quench protection system is assessed at all representative operating current levels. Furthermore, the coils hot-spot temperature and peak voltage to ground are analyzed for various failure cases, conductor parameters, and parameter distribution among the four coils. It is concluded that the proposed design assures an effective, reliable, and fully redundant quench protection system.

Published
2021

35. The High Luminosity LHC interaction region magnets towards series production

Author

Giorgio Apollinari, A. Musso, Vittorio Marinozzi, Marta Bajko, F. Toral, Stoyan Stoynev, Q. Peng, Franco Mangiarotti, Guram Chlachidze, N. Kimura, Lucio Fiscarelli, Hugues Bajas, Paolo Ferracin, Marco Statera, A. Milanese, Soren Prestemon, Jesse Schmalzle, S. Wei, J. Fleiter, Massimo Sorbi, L. Bottura, M. Prioli, Joseph Muratore, Glyn Kirby, P. Joshi, Q. Xu, Arnaud Devred, Thomas Strauss, R. Carcagno, Kathleen Amm, A. Foussat, P. Fabbricatore, M. Duda, Tatsushi Nakamoto, Giorgio Ambrosio, A. Pampaloni, Gerard Willering, D. Chen, J. Wang, Bernardo Bordini, H. Felice, A. Bersani, Lance D. Cooley, S. Enomoto, V. Lombardo, Ezio Todesco, Michinaka Sugano, G. de Rijk, Sandor Feher, Amalia Ballarino, Matthias Mentink, V. Parma, S. Farinon, Samuele Mariotto, P. Wanderer, S. Izquierdo Bermudez, F. Nobrega, M. Yu, I. Pong, Maria Baldini, Michael Anerella, J. Garcia Matos, B. Caiffi, Leonardo Paolo Rossi, Jac Perez, P. Fessia, D. Duarte Ramos, K. Suzuki, G.L. Sabbi, S. Russenschuck, H. Prin, Stephen A. Gourlay, Toru Ogitsu, L. Gong, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
magnet: design, Physics::Instrumentation and Detectors, fabrication, Series production, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, CERN LHC Coll: upgrade, Materials Chemistry, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Electrical and Electronic Engineering, niobium: titanium, 010306 general physics, activity report, 010302 applied physics, Physics, Large Hadron Collider, Luminosity (scattering theory), Metals and Alloys, magnet: superconductivity, Condensed Matter Physics, magnet: technology, quadrupole lens, Magnet, Ceramics and Composites, Physics::Accelerator Physics, niobium: tin
Abstract

The High Luminosity Large Hadron Collider (HL-LHC) is the new flagship project of CERN. First endorsed in 2013 and approved in 2016, HL-LHC is an upgrade of the accelerator aiming to increase by a factor of ten the statistics of the LHC collisions at the horizon of 2035–2040. HL-LHC relies on cutting edge technologies: among them, large aperture superconducting magnets will replace the present hardware to allow a smaller beam size in two interaction points (IPs). The project involves the construction of about 150 magnets of six different types: the quadrupole triplet, two main dipoles and three orbit correctors. The triplet, manufactured at CERN and in the USA, will consist of 30 magnets based on Nb3Sn technology, with an operational peak field of 11.4 T. These will be the first quadrupole Nb3Sn magnets installed in a particle accelerator. The other five types of magnets, all relying on Nb–Ti technology, present non-trivial challenges in the design and construction; they will be manufactured as part of in-kind contribution under the responsibility of institutes in Japan, China, Spain, and Italy. The project is now in the phase of transition between qualification through short models and prototypes and the beginning of the series construction. In this paper we review the magnet requirements, the reasons for selecting the design, the technological challenges with respect to previous projects, and we summarize the steps that have been taken to validate the baseline.

Published
2021

36. Progress in the Development of the Nb$_3$Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC

Author

E. Takala, Rosario Principe, Paolo Ferracin, Giorgio Apollinari, Lucio Fiscarelli, Juan Carlos Perez, Nicholas Lusa, Marta Bajko, Ezio Todesco, Bernardo Bordini, Emmanuele Ravaioli, Friedrich Lackner, H. Prin, Susana Izquierdo Bermudez, Franco Mangiarotti, D Ramos, Dariusz Pulikowski, Attilio Milanese, Sandor Feher, J. Fleiter, Giorgio Ambrosio, Nicolas Bourcey, and Michael Guinchard

Subjects
Physics, Large Hadron Collider, Aperture, Physics::Instrumentation and Detectors, Nuclear engineering, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Accelerators and Storage Rings, Electronic, Optical and Magnetic Materials, Upgrade, Electromagnetic coil, Magnet, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, Quadrupole magnet
Abstract

The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). With a nominal operating gradient of 132.2 T/m in a 150 mm aperture and a conductor peak field of 11.3 T, the new quadrupole magnets are based on Nb3Sn superconducting technology. After a series of short models constructed in close collaboration by LARP (LHC Accelerator Research Program) and CERN, the development program is entering in the series production phase with CERN on one side and the US Accelerator Upgrade Project (US-AUP) on the other side assembling and testing full-length magnets. This paper describes the status of the development activities at CERN, in particular on the cold powering test of the first MQFXB prototype and on the construction of the second full scale prototype. Critical operations such as reaction heat treatment, coil impregnation and magnet assembly are discussed. Finally, the plan towards the series production is described.

Published
2021

37. Magnetic Field Measurements of First Pre-series Full-Length 4.2 m Quadrupole MQXFA03 Using PCB Rotating Coils for the Hi-Lumi LHC Project

Author

Joseph DiMarco, Daniel Cheng, GianLuca Sabbi, Joseph Muratore, P. Wanderer, Jesse Schmalzle, Honghai Song, Giorgio Ambrosio, Michael Anerella, Animesh Jain, Sandor Feher, Paolo Ferracin, Giorgio Apollinari, Kathleen Amm, Xiaorong Wang, Guram Chlachidze, P. Joshi, Ezio Todesco, Susana Izquierdo Bermudez, Heng Pan, and M. Yu

Subjects
Physics, Cryostat, Large Hadron Collider, business.industry, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Accelerators and Storage Rings, Electronic, Optical and Magnetic Materials, Magnetic field, Optics, Electromagnetic coil, Magnet, Harmonics, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics, business
Abstract

The U.S. Hi-Lumi LHC Accelerator Upgrade Project (AUP) and CERN have joined efforts to develop high field quadrupoles for the Hi-Lumi LHC upgrade. The US national laboratories in the AUP project will deliver 10 magnets and each cryostat has two 4.2 m high gradient quadrupoles in it. These magnets are made of Nb3Sn conductors, with large aperture (150 mm) and integrated gradient of 556.9 T. This paper reports on magnetic measurements performed during the vertical test at Brookhaven National Laboratory (BNL) in 2019-2020. A warm measurement Z-Scan (+/−15 A) with 42 Z-positions before cool-down was performed at BNL. The results were directly compared to field data measured at LBNL during magnet assembly. Measured harmonics and magnetic center offsets (ΔX and ΔY) have provided timely and informative diagnostics on the magnet structure's shape at both warm and cold temperatures. A new centering fixture was designed and added to better center the warm bore tube which contains the rotating coil probe. After the quench training to 16.47 kA was achieved, a complete set of cold measurements (Z-Scan at 16.47 kA and I-Scan from 960 A to 16.47 kA and back to 960 A) was made. Periodic axial variation of allowed and nonallowed harmonics was observed which is related to the coil radial and/or mid-plane variations along the magnet axis. Overall, the average harmonics in the straight section are within the required field boundaries. The U.S. Hi-Lumi LHC Accelerator Upgrade Project (AUP) and CERN have joined efforts to develop high field quad-rupoles for the Hi-Lumi LHC upgrade. The US national laborato-ries in the AUP project will deliver 10 magnets and each cryostat has two 4.2 m high gradient quadrupoles in it. These magnets are made of Nb3Sn conductors, with large aperture (150 mm) and in-tegrated gradient of 556.9 T. This paper reports on magnetic measurements performed during the vertical test at Brookhaven National Laboratory (BNL) in 2019-2020. A warm measurement Z-Scan (+/- 15 A) with 42 Z-positions before cool-down was per-formed at BNL. The results were directly compared to field data measured at LBNL during magnet assembly. Measured harmonics and magnetic center offsets (ΔX and ΔY) have provided timely and informative diagnostics on the magnet structure’s shape at both warm and cold temperatures. A new centering fixture was de-signed and added to better center the warm bore tube which con-tains the rotating coil probe. After the quench training to 16.47 kA was achieved, a complete set of cold measurements (Z-Scan at 16.47 kA and I-Scan from 960 A to 16.47 kA and back to 960 A) was made. Periodic axial variation of allowed and nonallowed harmonics was observed which is related to the coil radial and/or mid-plane variations along the magnet axis. Overall, the average harmonics in the straight section are within the required field boundaries.

Published
2021

38. Optimization of the High Order Correctors for HL-LHC Toward the Series Production

Author

Alessandro Zanichelli, Carlo Uva, Massimo Sorbi, F. Broggi, Maurizio Todero, Marco Canetti, Ezio Todesco, Alessandro Pasini, C Santini, F. Alessandria, Luca Imeri, Marco Campaniello, D. Pedrini, Samuele Mariotto, Andrea Musso, Marco Statera, Antonio Paccalini, Augusto Leone, Paolo Manini, Giovanni Bellomo, Marco Prioli, Fabrizio Gangini, and Riccardo Valente

Subjects
Standardization, Computer science, multipole, Superconducting magnet, corrector magnets, 01 natural sciences, Acceptance testing, 0103 physical sciences, superconducting magnet, Electrical and Electronic Engineering, 010306 general physics, Large Hadron Collider, superconducting coils, business.industry, Skew, Quality control, superferric magnet, Accelerator Magnets, Modular design, test facility, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Reliability engineering, Magnet, magnet training, Hi-Lumi LHC, business
Abstract

INFN is developing at the LASA lab (Milano, Italy) the High Order (HO) corrector magnets for the High Luminosity-LHC (HL-LHC) project, which will equip the interaction regions. Five prototypes, from skew quadrupole to dodecapole, have been designed and tested at LASA. All the HO correctors are based on a superferric design, which allows a relatively simple, modular, and easy to construct magnet. This modularity has been exploited for an engineering change request. The tradeoff between safe handling, force management during cooldown, powering and protection of the magnet is explained in detail. The design of the coils and the mechanical assembly have been improved to increase the efficiency of the series production. Most of the optimizations are aimed to guarantee both a good integration in the LHC framework (i.e., radiation hardness, easiness of installation, safe operation over years), and compatibility with the series production (i.e., standardization of procedures and components for different magnets, reduction of the number of components, standardization of the quality control systems and acceptance tests). All of the produced magnets will be tested at LASA and then delivered to CERN. The design of the test-bed and the optimization of cryogenic and testing procedures is also described in this paper. Following the completion of the prototyping phase, we report in detail the solutions chosen for the HO correctors and we give a perspective of the series construction in industry and acceptance tests at LASA.

Published
2021

39. HE-LHC: The High-Energy Large Hadron Collider Future Circular Collider Conceptual Design Report Volume 4

Author

Pushpalatha C Bhat, B. Seeber, C. Pagliarone, Marco Statera, Victor P. Goncalves, Daria Astapovych, W. Bartmann, S. Iwamoto, M. Mentink, Alessandro Tricoli, E. R. Bielert, Laurent Chevalier, Patrick Koppenburg, Marco Calviani, C. Montag, P. Spiller, Jan Uythoven, P. Di Nezza, G. Guillermo Canton, B. Sailer, Markus Elsing, Sara Khatibi, Luca Vecchi, Luigi Palumbo, J. P. Penttinen, T. Podzorny, Maneesh Kumar, J. M. Rifflet, C. Kotnig, Jean Zinn-Justin, Christopher B. Verhaaren, A. Chernoded, Alessandro Bertarelli, L. M. Tkachenko, C. Koeberl, P. J. Mallon, M. Takeuchi, W. Venturini Delsolaro, G. Lamanna, S. Weinzierl, J. Gao, W. Kaabi, David D'Enterria, D. Barna, Paolo Castelnovo, Rajat Gupta, Oliver Boine-Frankenheim, Adarsh Pyarelal, Andreas Salzburger, Tessa Charles, M.E. Biagini, O. Panella, M. Stuart, A. Kollegger, V. Garcia Diaz, Olcay Bolukbasi, Maurizio Pierini, H. Aksakal, Tord Riemann, Abhishek M. Iyer, V. Shiltsev, D. Buttazzo, J. Blümlein, Prateek Agrawal, L. Sestini, Martin Bauer, Felicitas Pauss, S. Fiorendi, F. Bossu, Marco Nardecchia, C. Leonidopoulos, Wojciech Kotlarski, A. Saba, I. Bautista-Guzmán, W. Hillert, Giorgio Ambrosio, T. Lehtinen, Michael Andrew Parker, Silvia Taroni, Gian F. Giudice, Ph. Lebrun, Johann A. Briffa, T. Risselada, Giuseppe Lerner, A. Lechner, L. S. Miralles, M. Kuze, J. M. Valet, P. S. B. Dev, S. Holleis, Ph. Schwemling, M. Biglietti, S. Banerjee, Thomas Schörner-Sadenius, A. Sanz Ull, V. Tikhomirov, S. Savelyeva, Jiayin Gu, D. Zhou, Federico Ravotti, S. A. Bogacz, Daniele Mirarchi, R. Tomás García, Yann Coadou, F. Yu, Y. Cai, T. Lari, F. Holdener, D. Shwartz, C. Bhat, Ramesh Gupta, Markus Klute, E. Palmieri, P. Collier, Branislav Sitar, Yves Sirois, Livio Fanò, S. Rojas-Torres, E. Locci, Ruben Garcia Alia, I. Božović Jelisavić, R. Chehab, J. A. Aguilar-Saavedra, M. Pasquali, A. Di Cicco, Bernhard Auchmann, Klaus Heinemann, Alessia Tricomi, D. Lucchesi, B. Haerer, M. Morrone, Paolo Giacomelli, Sonia Carra, A. Senol, Ivan Koop, Luca Silvestrini, Anna Stakia, Heather Gray, E. Skordis, A. D. Kovalenko, Paul Langacker, R. Li, Bernardo Bordini, R. Rata, Arjan Verweij, Shehu S. AbdusSalam, Andrey Karyukhin, U. van Rienen, Gianluigi Arduini, Bernhard Holzer, S. A. Nikitin, S. S. Kozub, Satoshi Mishima, B. Di Micco, S. Izquierdo Bermudez, N. Pukhaeva, Nigel Watson, F. Prino, Jean-Michel Sallese, Sotirios Vlachos, Alessandro Vicini, A. Valassi, Daniel Treille, F. Dordei, A. M. Fernandez Navarro, B. Dziewit, Marcello Abbrescia, J. M. Hauptman, I. Chaikovska, Paolo Giubellino, Michael J. Baker, V.V. Kashikhin, Friedrich Lackner, Filippo Sala, A. Langner, D. Pulikowski, H. Eriksson, Matteo Turri, Andrea Wulzer, M. Aiba, Lisa Borgonovi, I. Morozov, V. Haurylavets, J. F. Croteau, S. Boselli, L. A. Gonzalez Gomez, Claudia Tambasco, F. Mahmoudi, Sébastien Descotes-Genon, A. Luciani, Pavel Piminov, M. Varasteh, T. Herzig, Sandra Aumon, Cristina Bernini, Joseph Bramante, Roberta Arnaldi, G. Zick, Daniel Schulte, R. Santoro, Anna Kulesza, I. Turk Cakir, M. Nonis, Silvia Posada Arias, Livia Soffi, T. Wojtoń, E. Cennini, Florian Bauer, B. Rousset, J.-L. Grenard, C. Neubüser, Frederic Derue, Loukas Gouskos, Rainer Wallny, G. Calderini, M. Merk, M. Mühlegger, Roberto Cimino, M. Ramsey-Musolf, P. Rebello Teles, Mario Galanti, Mikhail Shaposhnikov, A. Andreazza, Maria Vittoria Garzelli, Masaya Ishino, José W. F. Valle, Colin Bernet, G. Velev, Cristina Botta, E. Fischer, J. Malclés, Giuseppe Montenero, Tripurari Srivastava, E. Renner, Shahnam Gorgi Zadeh, D. Cantore-Cavalli, Paul Laycock, J. Komppula, Simon C. Hopkins, Helmut Burkhardt, Eric Lancon, I. Aichinger, Andre Sznajder, F. Bordry, Massimo Giovannozzi, Aidan Robson, Anna Giunta, A. Carvalho, S. Farinon, Daniel Wollmann, M. Fouaidy, Martti Raidal, R. Gerard, Giovanni Volpini, U. Niedermayer, A. Alekou, Alexander J.G. Lunt, Vincenzo Cavasinni, Andrzej Siodmok, U. Kaya, Matthias Schott, Marumi Kado, S. A. Arsenyev, José Zurita, John Osborne, Patrick Meade, Gianmarco Bovone, G. Li, Klaus Schlenga, Antti Stenvall, D. Duellmann, Werner Riegler, I. Garzia, Yasuyuki Okumura, G. Pikurs, F. Maltoni, Massimo Sorbi, M. Arzeo, B. Strauss, Y. W. Baek, Mauro Chiesa, K. Ilyina-Brunner, Javier L. Albacete, R. Farinelli, C. Pes, Nicolas Morange, S. M. Zernov, U. Wagner, Emmanuelle Perez, G. G. Da Silveira, J. Neundorf, Néstor Armesto, T. Hahn, Roman N. Lee, Roderik Bruce, B. Y. Sharkov, T. du Pree, G. Cibinetto, Evelin Meoni, R. Rinaldesi, James A. Ellison, Radim Slovak, Silvia Franchino, Mikko Laine, T. Pugnat, S. P. Das, Yuji Enari, Emanuela Barzi, Cihan Bayindir, R. Boels, Jana Faltova, M. Moreno Llácer, Scott A. Yost, Michael Spannowsky, Florian Burkart, Marcin Chrzaszcz, K. Suzuki, Luca Trentadue, S. Masciocchi, Gilad Perez, Steve Peggs, K. Sugita, Eleonora Belli, Carmine Senatore, K. Y. Oyulmaz, Aldo Deandrea, Irakli Minashvili, Desmond P. Barber, M. I. Martínez-Hernández, A. Apyan, S. Petracca, Mikael Chala, Urs Achim Wiedemann, T. Sian, Olivier Deschamps, R. Monge, G. Avrillaud, Jan Kieseler, Hubert Spiesberger, J. Maitre, G. D. Shirkov, M. Hofer, Emanuela Sirtori, Sinan Kuday, Kirill Skovpen, Sara Casalbuoni, Johann Usovitsch, N. Chen, G. Tejeda-Muñoz, F. Bellini, E. Chyhyrynets, Michael Stöger-Pollach, M. Vogel, J. G. Mendes Saraiva, A. Rivetti, M. Podeur, Luc Poggioli, V. A. Gromov, R. Sirvinskaite, S. B. Leith, Giancarlo D'Ambrosio, Tony Price, Philippe Mermod, Rabindra N. Mohapatra, T. Mitshuhashi, Koji Terashi, Leonel Ferreira, L. Vale Silva, N. Muchnoi, J. L. Stanyard, Thomas Marriott-Dodington, A. Andriatis, Oleg Solovyanov, A. Daljevec, A. Butterworth, S. Myers, D. Chanal, Tatiana Pieloni, M. Rodríguez-Cahuantzi, G. Nardini, D. Boscherini, Kazuhito Ohmi, James Molson, S. Kowalski, Christoph Haberstroh, Martin Aleksa, K. Kershaw, M. Mulder, Leonid Rivkin, G. Vorotnikov, Luigi Salvatore Esposito, J. Kalinowski, Michele Cascella, Francesco Giffoni, Alessandro Polini, Georges Azuelos, M. Prioli, Wolfgang Altmannshofer, S. K. Patra, H. J. He, J. J. Aguilera-Verdugo, Hannu Paukkunen, P. Chomaz, Shoji Asai, Nicolas Magnin, Gavin P. Salam, R. Wang, F. Avino, Alexander Romanenko, A. Rossi, Steve Muanza, Richard Ruiz, Dmitry Teytelman, S. Klöppel, S. Atieh, M. Mohammadi Najafabadi, L. Apolinario, Andrea Tesi, M. Maggiora, A. Falkowski, Janusz Gluza, M. Sauvain, Hamzeh Khanpour, S. Chance, Ansgar Denner, Ma. Greco, Andreas Papaefstathiou, Manuela Boscolo, Joydeep Chakrabortty, E. Franco, R. R. Bosley, G. Peón, Fred Olness, Simone Alioli, Andrea Gaddi, M. K. Sullivan, M. Segreti, M. Panareo, Florian Goertz, Z. G. Zhao, H. Chanal, O. Martin, P. Azzurri, Agnieszka Chmielinska, M. Kordiaczyńska, O. Brunner, J. Von Ahnen, Jose Santiago, K. Foraz, Y. Alexahin, Marcello Mannelli, Christian Schwanenberger, S. Ganjour, Simone Marzani, T. M. Taylor, S. Di Vita, J. Womersley, I. Karpov, Valentina Morretta, Saverio D'Auria, Patrick Draper, B. Hacışahinoğlu, E. Gorini, Andrew J. Long, S. La Mendola, G. Zevi Dell Porta, I. Abdyukhanov, M. Cobal, Luca Marzola, E. Rochepault, A. Kusina, German Rodrigo, R. Schmidt, Jan Steggemann, E. Premat, P. Slavich, F. Gianotti, P. Jarry, Ram Krishna Dewanjee, L. Felsberger, T. Martinez, A. Niemi, Jürgen Reuter, P. A. Bruckman de Renstrom, Ryu Sawada, J. T. Childers, Gelsomina Catalano, P. Barjhoux, O. R. Blanco-García, Pilar Hernández, H. Correia-Rodrigues, V. Ippolito, S. De Curtis, Juan Rojo, Ayberk Yilmaz, S. Baird, Morteza Khatiri Yanehsari, Enrico Scomparin, Daniel Appelö, J. Kozaczuk, Matthew Jones, B. Caiffi, C. Del Bo, Susanna Guiducci, Giuliano Panico, M. Knecht, J. Coupard, M. Ciuchini, H. Kritscher, Claire Gwenlan, P. Costa Pinto, Thibaut Lefèvre, N. Bellegarde, Christian Scheuerlein, P. Ferreira da Silva, M. Verducci, X. Ruan, H. Pikhartova, Juan M. O'Callaghan, Kazuro Furukawa, D. Saez de Jauregui, Maria Rescigno, Stephan Eisenhardt, Andrea Dainese, Z. Drásal, G. H. Corral, J. M. Camalich, John Ellis, E. Gabrielli, L. Rumyantsev, A. Caliskan, K. Brunner, K. Tang, P. Sopicki, J. Fan, Marcin Kucharczyk, S. Gorgi Zadeh, Carlos A. Salgado, Simone Bologna, Y. Muttoni, A. Chancé, Patrick Jenny, Mark Boland, G. Yang, G. Wilkinson, Roger J. Hernández-Pinto, M. Novák, Gennady Stupakov, E. Jensen, Lance D. Cooley, Torbjörn Sjöstrand, S. Su, Matthew Luzum, J. Casas, Per Osland, T. Robens, Oscar A. Sampayo, Evgeny Levichev, P. N. Ratoff, G. Rolandi, M. A. Valdivia Garcia, Anthony Keith Morley, L. van Riesen-Haupt, A. Sublet, M. A. Mazzoni, J.L. Gutierrez, A. Abramov, Abbas Kenan Ciftci, A. Provino, L. Delle Rose, John Fox, Barry M. Dillon, V. Smirnov, G. N. Taylor, Anke-Susanne Müller, C. Pira, Fulvio Piccinini, A. Faus-Golfe, Pietro Antonioli, S. Sanfilippo, Julien Cogan, A. Ribon, Andrew Hutton, Frank Zimmermann, Lev Dudko, Erez Etzion, J. Polinski, G. Bencivenni, M. Gil Costa, L. K. Gladilin, Yannis Papaphilippou, Michael Spira, Maria Paola Lombardo, M. Fiascaris, Darius A. Faroughy, S. O. Kara, Peter Braun-Munzinger, A. Wohlfahrt, A. A. Krasnov, S.A. Gourlay, W. Da Silva, Jacqueline Keintzel, Radja Boughezal, Renat Sadykov, L. R. Sulak, Valentin V. Khoze, T. Tydecks, S. Puławski, Daniel de Florian, Pedro Schwaller, A. Akay, Nicola Serra, Sukanta Dutta, Christophe Royon, Alessandro Ricci, A. Kuendig, C. G. Honorato, K. Kołodziej, L. Deniau, Michael Kramer, J. Ferradas Troitino, A. Arbey, A. M. Staśto, Marcel Demarteau, Ralph Aßmann, O. Grimm, D. Forkel-Wirth, Owain Rhodri Jones, A. M. Kolano, G. Chiarello, William Trischuk, Andrea Dell'Acqua, Elisabetta Gallo, H. Song, Frank Petriello, N. Ibarrola, C. Colldelram, A. I. Ryazanov, A. Meier, Phillip Allport, J. de Blas, S. Chattopadhyay, Massimo Florio, X. Jiang, Bertrand Baudouy, T. Otto, Tevong You, Christoph Englert, Roberto Pittau, G. M. Bilei, Matthew McCullough, N. S. Ramírez-Uribe, J. Charles, Amalia Ballarino, Federico Antinori, A. V. Kotwal, P. Le Guen, Berndt Müller, Chiara Roda, Xavier Buffat, D. K. Hong, Matthias Liepe, G. Gorine, V. A. Okorokov, D. Bozzini, N. Simand, Giuseppe Francesco Tartarelli, C. Marquet, R. Contino, A. M. Teixeira, R. Trant, Roberto Losito, M. Quispe, Valery I. Telnov, Helga Timko, D. Lissauer, Giulio Aielli, Giorgio Chiarelli, M. J. Baldwin, A. Winter, X. Sarasola, E. E. Boos, Aleandro Nisati, Cedric Garion, Monica D'Onofrio, S. M. Gascon-Shotkin, Daniele Barducci, G. Rosaz, Nathaniel Craig, L. D’Aloia Schwartzentruber, A. Falou, A. Henriques, Tobias Hurth, Michael Eisterer, Andreas Grau, Austin Ball, D. Delikaris, P. A. McIntosh, E. Graverini, Kadri Ozdemir, F. Valchkova, Marco Zanetti, Guenakh Mitselmakher, S. Albergo, Peter Levai, Caterina Vernieri, F. Stivanello, Michael Barnes, Henri Bachacou, Daniel Fournier, L. T. Wang, D. Boutin, S. Moretti, B. Riemann, Michael Murray, Aleksandr Azatov, C. T. A. Cook, Valentina Maria Cairo, J. B. De Vivie De Regie, H. Schmickler, M. Schenk, Georgios Voutsinas, André Schöning, S. G. Bondarenko, Giorgio Bellomo, Andrei Seryi, Jane Nachtman, Clement Helsens, E. De Lucia, Jakob Salfeld-Nebgen, Lorenzo Pezzotti, Z. Townsend, B. Dalena, Mogens Dam, Yasar Onel, Yi-Ming Zhong, B. Curé, A. A. Kolomiets, A. M. Valente-Feliciano, Laurette Ponce, David Olivier Jamin, P. Krkotic, Alexandre Louzguiti, Marina Putti, Holger Podlech, Petr Volkov, M. Angelucci, F. Duval, I. Hiekkanen, W. M. Yao, Giancarlo Ferrera, C. Lorin, Y. Dydyshka, Kurt R. Peters, Gergely Gabor Barnafoldi, V. Vysotsky, V. Arı, E. Pilicer, M. Chamizo-Llatas, G. Kuhlmann, Hans Quack, R. Valizadeh, Tiina Salmi, Thomas Kramer, Adam Jeff, A. Abada, J. M. Duval, J. Abelleira Fernandez, A. Leveratto, E. Tal Hod, X. Wu, Laurent Serin, Sarah Aull, Samuele Mariotto, A. Poiron, Sabine Riemann, P. Selva, V. I. Pantsyrny, Gianluca Valentino, K. Kahle, S. Aune, K. Potamianos, Eros Cazzato, M. Giovannetti, Petr Mandrik, S. Sidorov, F. Collamati, Simone Gilardoni, S. Bertolucci, Alexander V. Zlobin, Mehmet Sahin, Marco Delmastro, G. Aydın, A. Doblhammer, Alan S. Cornell, S. J. De Jong, M. Caccia, M. Lueckhof, P. Sollander, Mauro Taborelli, J. Shelton, Frank Gerigk, Robert Rimmer, Ayres Freitas, Pierluigi Bruzzone, Brajesh K. Singh, K. Keppel, N. Alipour Tehrani, C. Prasse, Louis Rinolfi, Emma Slade, W. Flieger, Alexey Dudarev, H. J. Yang, T. Köttig, L. Mether, C. Weiland, Andrea Malagoli, Sunghoon Jung, F. Conventi, I. Tropin, G. H. A. Viehhauser, Tomas Davidek, Y. O. Günaydin, Daniel Andreas Britzger, F. Toral, James John Brooke, R. Steerenberg, G. Morello, Mauro Migliorati, Alexej Grudiev, C. Tetrel, Wolfgang Höfle, J. V. Minervini, L. García Tabarés, V. Yermolchik, Claude Guyot, D. Guadagnoli, Giorgio Vallone, N. De Filippis, Oleksii Beznosov, P. Charitos, N. Schwerg, Ahmed Hammad, P. Manil, F. Niccoli, Lydia Iconomidou-Fayard, R. Aleksan, K. Hahn, P. Meridiani, Peter Skands, Tobias Golling, Lucio Rossi, G. Gobbi, Michael Hance, A. J. Barr, V. Del Duca, V. Guzey, M. Pont, Michele Selvaggi, Oliver Brüning, J. Barreiro Guimarães da Costa, A. Drago, Y. Zhang, Giovanni Punzi, Viktor Matveev, Anadi Canepa, Clemens Lange, B. L. Militsyn, Martijn Mulders, Max Klein, V. D’Auria, M. Mylona, Valeria Braccini, S. DasBakshi, David Calvet, Sophia Borowka, David Marzocca, S. Jadach, A. A. Pankov, Christophe Ochando, A. A. Tudora, I. Masina, Jure Zupan, A. Preinerstorfer, Benjamin Fuks, H. K. Soltveit, G. Rolando, E.E. Perepelkin, T. G. Rizzo, Saleh Sultansoy, Federico Roncarolo, K. Elsener, R. Q. Pan, P. Zhuang, David Attié, Jac Perez, K. Kravalis, F. Anulli, V. Ruhlmann-Kleider, S. Malvezzi, Steffen A. Bass, E. La Francesca, Heinz Pernegger, K. Grzanka, M. T. Tiirakari, Alberto Ventura, Alessandro Cerri, Marco Peruzzi, Eric Montesinos, O. Etisken, F. Grancagnolo, S. Kartal, H. Humer, Oliver Fischer, M. Primavera, Marco Toliman Lucchini, P. Vedrine, Felix Kling, M. Altınlı, Sergio Calatroni, C. Han, Olivier Leroy, R. T. D’Agnolo, N. Klinkenberg, A. Audurier, Tatsushi Nakamoto, Ali Bozbey, Bernd A. Kniehl, Carl J. Debono, I. P. J. Shipsey, Gregorio Bernardi, Paolo Nason, William James Fawcett, J. M. Jiménez, D. Denisov, M. Serluca, David Curtin, Arif Akhundov, M. García Pérez, Iacopo Vivarelli, Emanuele Bacchiocchi, Markus Zerlauth, Julia Hrdinka, F. Butin, F. Müller, D. Tikhonov, Jorg Wenninger, A. Kilic, Fabrizio Ferro, J. Tanaka, S. A. Antipov, Miroslav Atanasov, S. Kuttimalai, A. Y. Starikov, F. R. Blánquez, S. V. Furuseth, G. Gaudio, L. Malgeri, J. Curti, B. Turbiarz, S. Li, A. Romanov, Costas G. Papadopoulos, Brennan Goddard, Frank Krauss, Lidija Zivkovic, Toms Torims, Michaela Lackner, D. A. Lyubimtsev, G. Borghello, J. F. Grosse-Oetringhaus, A. Bogomyagkov, H. Duran Yildiz, N. Foppiani, Arthur Schaffer, J. Zhou, D. Liberati, Vincenzo Guidi, Naeem A. Tahir, M. Besançon, Daniel Schoerling, Joe Incandela, Giacomo Polesello, O. Cakir, I. Ruehl, Ruggero Vaglio, Z. Zhang, Bruno Spataro, Davide Tommasini, F. Millet, H. D. Yoo, Carlo V. Fiorio, S. Deghaye, C. Bozzi, A. Shivaji, G. Corcella, I. Bellafont, Valentina Mariani, D. E. Martins, Michael Syphers, C. Hati, Peter Marquard, Nicola Bacchetta, Matthew Crouch, David Woog, Oliver Kortner, A. Milanese, Ricardo Gonçalo, Guido Montagna, Mikhail Zobov, F. Bedeschi, Eugene Bulyak, M. Aburaia, R. Tenchini, G. Marchiori, H. Rafique, G. Calderola, M. Antonello, Andrea Thamm, S. Glukhov, F. Hug, Robert Ruprecht, Veysi Erkcan Ozcan, K. Lee, Angelo Infantino, V. Makarenko, Z. Nergiz, Sergei Chekanov, Benjamin C. Allanach, C. Dachauer, H. Zhang, C. Biscari, A. J. Lankford, Scott Thomas, P. Kostka, Thomas Gehrmann, O. Azzolini, M. Ploskon, S. F. Ge, K. Oide, Andrea Bastianin, Daniela Bortoletto, Ingo Schienbein, J. L. Biarrotte, M. van Leeuwen, D. Stöckinger, Harald Ita, J. Katharina Behr, A. Cholakian, T. Kwon, L. Medina, Evgeny Starchenko, G. Mancinelli, L. Zanotto, F. Menez, L. Bellagamba, J. P. 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Panizzo, Antonio Racioppi, E. Gianfelice-Wendt, Rashidul Islam, U. Cardella, Y. Bai, A. Novokhatski, P. Zeiler, A. Coccaro, Toshi Sumida, Andrzej Siemko, R. Franceschini, C. M. Carloni Calame, Elisa Fontanesi, G. Kozlov, J. Tkaczuk, Rama Calaga, F. Beaudette, Paolo Camarri, A. Pampaloni, E. Cruz Alaniz, M. Durante, Kari J. Eskola, S. A. Ellis, T. Lesiak, W. Chou, German F. R. Sborlini, Carlo Oleari, T. Fowler, A. Di Ciaccio, A. Bibet Chevalier, Stefano Forte, C. Berriaud, I. Tapan, Ezio Todesco, S. Lee, Jaime Hernández-Sánchez, D. M. Vogt, Oreste Nicrosini, Vittorio Marinozzi, Roberto Ferrari, M. I. Besana, Anna Sfyrla, Stanley J. Brodsky, G. de Rijk, Stefano Redaelli, Giorgio Apollinari, A. Zaborowska, Alessandro Cardini, J. F. Kamenik, V. Smaluk, Uta Klein, M. Bomben, P. Manfrinetti, M. Poli Lener, Jose Miguel No, Tiziano Camporesi, H. Gerwig, Francis Pérez, M. Koratzinos, V. Karaventzas, Jesse Thaler, T. Hoehn, M. Capeans, Sven Pfeiffer, P. Duda, H. 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Zurita, J, Işık Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Işık University, Faculty of Engineering, Department of Civil Engineering, Bayındır, Cihan, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones, Abada A., Abbrescia M., AbdusSalam S.S., Abdyukhanov I., Abelleira Fernandez J., Abramov A., Aburaia M., Acar A.O., Adzic P.R., Agrawal P., Aguilar-Saavedra J.A., Aguilera-Verdugo J.J., Aiba M., Aichinger I., Aielli G., Akay A., Akhundov A., Aksakal H., Albacete J.L., Albergo S., Alekou A., Aleksa M., Aleksan R., Alemany Fernandez R.M., Alexahin Y., Alia R.G., Alioli S., Alipour Tehrani N., Allanach B.C., Allport P.P., Altinli M., Altmannshofer W., Ambrosio G., Amorim D., Amstutz O., Anderlini L., Andreazza A., Andreini M., Andriatis A., Andris C., Andronic A., Angelucci M., Antinori F., Antipov S.A., Antonelli M., Antonello M., Antonioli P., Antusch S., Anulli F., Apolinario L., Apollinari G., Apollonio A., Appelo D., Appleby R.B., Apyan A., Arbey A., Arbuzov A., Arduini G., Ari V., Arias S., Armesto N., Arnaldi R., Arsenyev S.A., Arzeo M., Asai S., Aslanides E., Assmann R.W., Astapovych D., Atanasov M., Atieh S., Attie D., Auchmann B., Audurier A., Aull S., Aumon S., Aune S., Avino F., Avrillaud G., Aydin G., Azatov A., Azuelos G., Azzi P., Azzolini O., Azzurri P., Bacchetta N., Bacchiocchi E., Bachacou H., Baek Y.W., Baglin V., Bai Y., Baird S., Baker M.J., Baldwin M.J., Ball A.H., Ballarino A., Banerjee S., Barber D.P., Barducci D., Barjhoux P., Barna D., Barnafoldi G.G., Barnes M.J., Barr A., Barranco Garcia J., Barreiro Guimaraes da Costa J., Bartmann W., Baryshevsky V., Barzi E., Bass S.A., Bastianin A., Baudouy B., Bauer F., Bauer M., Baumgartner T., Bautista-Guzman I., Bayindir C., Beaudette F., Bedeschi F., Beguin M., Bellafont I., Bellagamba L., Bellegarde N., Belli E., Bellingeri E., Bellini F., Bellomo G., Belomestnykh S., Bencivenni G., Benedikt M., Bernardi G., Bernardi J., Bernet C., Bernhardt J.M., Bernini C., Berriaud C., Bertarelli A., Bertolucci S., Besana M.I., Besancon M., Beznosov O., Bhat P., Bhat C., Biagini M.E., Biarrotte J.-L., Bibet Chevalier A., Bielert E.R., Biglietti M., Bilei G.M., Bilki B., Biscari C., Bishara F., Blanco-Garcia O.R., Blanquez F.R., Blekman F., Blondel A., Blumlein J., Boccali T., Boels R., Bogacz S.A., Bogomyagkov A., Boine-Frankenheim O., Boland M.J., Bologna S., Bolukbasi O., Bomben M., Bondarenko S., Bonvini M., Boos E., Bordini B., Bordry F., Borghello G., Borgonovi L., Borowka S., Bortoletto D., Boscherini D., Boscolo M., Boselli S., Bosley R.R., Bossu F., Botta C., Bottura L., Boughezal R., Boutin D., Bovone G., Bozovic Jelisavic I., Bozbey A., Bozzi C., Bozzini D., Braccini V., Braibant-Giacomelli S., Bramante J., Braun-Munzinger P., Briffa J.A., Britzger D., Brodsky S.J., Brooke J.J., Bruce R., Bruckman De Renstrom P., Bruna E., Bruning O., Brunner O., Brunner K., Bruzzone P., Buffat X., Bulyak E., Burkart F., Burkhardt H., Burnet J.-P., Butin F., Buttazzo D., Butterworth A., Caccia M., Cai Y., Caiffi B., Cairo V., Cakir O., Calaga R., Calatroni S., Calderini G., Calderola G., Caliskan A., Calvet D., Calviani M., Camalich J.M., Camarri P., Campanelli M., Camporesi T., Canbay A.C., Canepa A., Cantergiani E., Cantore-Cavalli D., Capeans M., Cardarelli R., Cardella U., Cardini A., Carloni Calame C.M., Carra F., Carra S., Carvalho A., Casalbuoni S., Casas J., Cascella M., Castelnovo P., Castorina G., Catalano G., Cavasinni V., Cazzato E., Cennini E., Cerri A., Cerutti F., Cervantes J., Chaikovska I., Chakrabortty J., Chala M., Chamizo-Llatas M., Chanal H., Chanal D., Chance S., Chance A., Charitos P., Charles J., Charles T.K., Chattopadhyay S., Chehab R., Chekanov S.V., Chen N., Chernoded A., Chetvertkova V., Chevalier L., Chiarelli G., Chiarello G., Chiesa M., Chiggiato P., Childers J.T., Chmielinska A., Cholakian A., Chomaz P., Chorowski M., Chou W., Chrzaszcz M., Chyhyrynets E., Cibinetto G., Ciftci A.K., Ciftci R., Cimino R., Ciuchini M., Clark P.J., Coadou Y., Cobal M., Coccaro A., Cogan J., Cogneras E., Collamati F., Colldelram C., Collier P., Collot J., Contino R., Conventi F., Cook C.T.A., Cooley L., Corcella G., Cornell A.S., Corral G.H., Correia-Rodrigues H., Costanza F., Costa Pinto P., Couderc F., Coupard J., Craig N., Crespo Garrido I., Crivellin A., Croteau J.F., Crouch M., Cruz Alaniz E., Cure B., Curti J., Curtin D., Czech M., Dachauer C., D'Agnolo R.T., Daibo M., Dainese A., Dalena B., Daljevec A., Dallapiazza W., D'Aloia Schwartzentruber L., Dam M., D'Ambrosio G., Das S.P., DasBakshi S., da Silva W., da Silveira G.G., D'Auria V., D'Auria S., David A., Davidek T., Deandrea A., de Blas J., Debono C.J., De Curtis S., De Filippis N., de Florian D., Deghaye S., de Jong S.J., Del Bo C., Del Duca V., Delikaris D., Deliot F., Dell'Acqua A., Delle Rose L., Delmastro M., De Lucia E., Demarteau M., Denegri D., Deniau L., Denisov D., Denizli H., Denner A., d'Enterria D., de Rijk G., De Roeck A., Derue F., Deschamps O., Descotes-Genon S., Dev P.S.B., de Vivie de Regie J.B., Dewanjee R.K., Di Ciaccio A., Di Cicco A., Dillon B.M., Di Micco B., Di Nezza P., Di Vita S., Doblhammer A., Dominjon A., D'Onofrio M., Dordei F., Drago A., Draper P., Drasal Z., Drewes M., Duarte L., Dubovyk I., Duda P., Dudarev A., Dudko L., Duellmann D., Dunser M., du Pree T., Durante M., Duran Yildiz H., Dutta S., Duval F., Duval J.M., Dydyshka Y., Dziewit B., Eisenhardt S., Eisterer M., Ekelof T., El Khechen D., Ellis S.A., Ellis J., Ellison J.A., Elsener K., Elsing M., Enari Y., Englert C., Eriksson H., Eskola K.J., Esposito L.S., Etisken O., Etzion E., Fabbricatore P., Falkowski A., Falou A., Faltova J., Fan J., Fano L., Farilla A., Farinelli R., Farinon S., Faroughy D.A., Fartoukh S.D., Faus-Golfe A., Fawcett W.J., Felici G., Felsberger L., Ferdeghini C., Fernandez Navarro A.M., Fernandez-Tellez A., Ferradas Troitino J., Ferrara G., Ferrari R., Ferreira L., Ferreira da Silva P., Ferrera G., Ferro F., Fiascaris M., Fiorendi S., Fiorio C., Fischer O., Fischer E., Flieger W., Florio M., Fonnesu D., Fontanesi E., Foppiani N., Foraz K., Forkel-Wirth D., Forte S., Fouaidy M., Fournier D., Fowler T., Fox J., Francavilla P., Franceschini R., Franchino S., Franco E., Freitas A., Fuks B., Furukawa K., Furuseth S.V., Gabrielli E., Gaddi A., Galanti M., Gallo E., Ganjour S., Gao J., Garcia Diaz V., Garcia Perez M., Garcia Tabares L., Garion C., Garzelli M.V., Garzia I., Gascon-Shotkin S.M., Gaudio G., Gay P., Ge S.-F., Gehrmann T., Genest M.H., Gerard R., Gerigk F., Gerwig H., Giacomelli P., Giagu S., Gianfelice-Wendt E., Gianotti F., Giffoni F., Gilardoni S.S., Gil Costa M., Giovannetti M., Giovannozzi M., Giubellino P., Giudice G.F., Giunta A., Gladilin L.K., Glukhov S., Gluza J., Gobbi G., Goddard B., Goertz F., Golling T., Goncalves V.P., Goncalo R., Gonzalez Gomez L.A., Gorgi Zadeh S., Gorine G., Gorini E., Gourlay S.A., Gouskos L., Grancagnolo F., Grassellino A., Grau A., Graverini E., Gray H.M., Greco M., Grenard J.-L., Grimm O., Grojean C., Gromov V.A., Grosse-Oetringhaus J.F., Grudiev A., Grzanka K., Gu J., Guadagnoli D., Guidi V., Guiducci S., Guillermo Canton G., Gunaydin Y.O., Gupta R., Gupta R.S., Gutierrez J., Gutleber J., Guyot C., Guzey V., Gwenlan C., Haberstroh C., Hacisahinoglu B., Haerer B., Hahn K., Hahn T., Hammad A., Han C., Hance M., Hannah A., Harris P.C., Hati C., Haug S., Hauptman J., Haurylavets V., He H.-J., Hegglin A., Hegner B., Heinemann K., Heinemeyer S., Helsens C., Henriques A., Hernandez P., Hernandez-Pinto R.J., Hernandez-Sanchez J., Herzig T., Hiekkanen I., Hillert W., Hoehn T., Hofer M., Hofle W., Holdener F., Holleis S., Holzer B., Hong D.K., Honorato C.G., Hopkins S.C., Hrdinka J., Hug F., Humann B., Humer H., Hurth T., Hutton A., Iacobucci G., Ibarrola N., Iconomidou-Fayard L., Ilyina-Brunner K., Incandela J., Infantino A., Ippolito V., Ishino M., Islam R., Ita H., Ivanovs A., Iwamoto S., Iyer A., Izquierdo Bermudez S., Jadach S., Jamin D.O., Janot P., Jarry P., Jeff A., Jenny P., Jensen E., Jensen M., Jiang X., Jimenez J.M., Jones M.A., Jones O.R., Jowett J.M., Jung S., Kaabi W., Kado M., Kahle K., Kalinovskaya L., Kalinowski J., Kamenik J.F., Kannike K., Kara S.O., Karadeniz H., Karaventzas V., Karpov I., Kartal S., Karyukhin A., Kashikhin V., Katharina Behr J., Kaya U., Keintzel J., Keinz P.A., Keppel K., Kersevan R., Kershaw K., Khanpour H., Khatibi S., Khatiri Yanehsari M., Khoze V.V., Kieseler J., Kilic A., Kilpinen A., Kim Y.-K., Kim D.W., Klein U., Klein M., Kling F., Klinkenberg N., Kloppel S., Klute M., Klyukhin V.I., Knecht M., Kniehl B., Kocak F., Koeberl C., Kolano A.M., Kollegger A., Kolodziej K., Kolomiets A.A., Komppula J., Koop I., Koppenburg P., Koratzinos M., Kordiaczynska M., Korjik M., Kortner O., Kostka P., Kotlarski W., Kotnig C., Kottig T., Kotwal A.V., Kovalenko A.D., Kowalski S., Kozaczuk J., Kozlov G.A., Kozub S.S., Krainer A.M., Kramer T., Kramer M., Krammer M., Krasnov A.A., Krauss F., Kravalis K., Kretzschmar L., Kriske R.M., Kritscher H., Krkotic P., Kroha H., Kucharczyk M., Kuday S., Kuendig A., Kuhlmann G., Kulesza A., Kumar M., Kusina A., Kuttimalai S., Kuze M., Kwon T., Lackner F., Lackner M., La Francesca E., Laine M., Lamanna G., La Mendola S., Lancon E., Landsberg G., Langacker P., Lange C., Langner A., Lankford A.J., Lansberg J.P., Lari T., Laycock P.J., Lebrun P., Lechner A., Lee K., Lee S., Lee R., Lefevre T., Le Guen P., Lehtinen T., Leith S.B., Lenzi P., Leogrande E., Leonidopoulos C., Leon-Monzon I., Lerner G., Leroy O., Lesiak T., Levai P., Leveratto A., Levichev E., Li G., Li S., Li R., Liberati D., Liepe M., Lissauer D.A., Liu Z., Lobko A., Locci E., Logothetis Agaliotis E., Lombardo M.P., Long A.J., Lorin C., Losito R., Louzguiti A., Low I., Lucchesi D., Lucchini M.T., Luciani A., Lueckhof M., Lunt A.J.G., Luzum M., Lyubimtsev D.A., Maggiora M., Magnin N., Mahmoud M.A., Mahmoudi F., Maitre J., Makarenko V., Malagoli A., Malcles J., Malgeri L., Mallon P.J., Maltoni F., Malvezzi S., Malyshev O.B., Mancinelli G., Mandrik P., Manfrinetti P., Mangano M., Manil P., Mannelli M., Marchiori G., Marhauser F., Mariani V., Marinozzi V., Mariotto S., Marquard P., Marquet C., Marriott-Dodington T., Martin R., Martin O., Martin Camalich J., Martinez T., Martinez Bruzual H., Martinez-Hernandez M.I., Martins D.E., Marzani S., Marzocca D., Marzola L., Masciocchi S., Masina I., Massimiliano A., Massironi A., Masubuchi T., Matveev V.A., Mazzoni M.A., McCullough M., McIntosh P.A., Meade P., Medina L., Meier A., Meignan J., Mele B., Mendes Saraiva J.G., Menez F., Mentink M., Meoni E., Meridiani P., Merk M., Mermod P., Mertens V., Mether L., Metral E., Migliorati M., Milanese A., Milardi C., Milhano G., Militsyn B.L., Millet F., Minashvili I., Minervini J.V., Miralles L.S., Mirarchi D., Mishima S., Missiaen D.P., Mitselmakher G., Mitshuhashi T., Mnich J., Mohammadi Najafabadi M., Mohapatra R.N., Mokhov N., Molson J.G., Monge R., Montag C., Montagna G., Monteil S., Montenero G., Montesinos E., Moortgat F., Morange N., Morello G., Moreno Llacer M., Moretti M., Moretti S., Morley A.K., Moros A., Morozov I., Morretta V., Morrone M., Mostacci A., Muanza S., Muchnoi N., Muhlegger M., Mulder M., Mulders M., Muller B., Muller F., Muller A.-S., Munilla J., Murray M.J., Muttoni Y., Myers S., Mylona M., Nachtman J., Nakamoto T., Nardecchia M., Nardini G., Nason P., Nergiz Z., Nesterenko A.V., Netto J.A., Nettstrater A., Neubuser C., Neundorf J., Niccoli F., Nicrosini O., Nie Y., Niedermayer U., Niedziela J., Niemi A., Nikitin S.A., Nisati A., No J.M., Nonis M., Nosochkov Y., Novak M., Novokhatski A., O'Callaghan J.M., Ochando C., Ogur S., Ohmi K., Oide K., Okorokov V.A., Okumura Y., Oleari C., Olness F.I., Onel Y., Ortino M., Osborne J., Osland P., Otto T., Oyulmaz K.Y., Ozansoy A., Ozcan V., Ozdemir K., Pagliarone C.E., Pais da Silva H.F., Palmieri E., Palumbo L., Pampaloni A., Pan R.-Q., Panareo M., Panella O., Panico G., Panizzo G., Pankov A.A., Pantsyrny V., Papadopoulos C.G., Papaefstathiou A., Papaphilippou Y., Parker M.A., Parma V., Pasquali M., Patra S.K., Patterson R., Paukkunen H., Pauss F., Peggs S., Penttinen J.-P., Peon G., Perepelkin E.E., Perez E., Perez J.C., Perez G., Perez F., Perez Codina E., Perez Morales J., Perfilov M., Pernegger H., Peruzzi M., Pes C., Peters K., Petracca S., Petriello F., Pezzotti L., Pfeiffer S., Piccinini F., Pieloni T., Pierini M., Pikhartova H., Pikurs G., Pilicer E., Piminov P., Pira C., Pittau R., Placzek W., Plagge M., Plehn T., Pleier M.-A., Ploskon M., Podeur M., Podlech H., Podzorny T., Poggioli L., Poiron A., Polesello G., Poli Lener M., Polini A., Polinski J., Polozov S.M., Ponce L., Pont M., Pontecorvo L., Portaluri T., Potamianos K., Prasse C., Prausa M., Preinerstorfer A., Premat E., Price T., Primavera M., Prino F., Prioli M., Proudfoot J., Provino A., Pugnat T., Pukhaeva N., Pulawski S., Pulikowski D., Punzi G., Putti M., Pyarelal A., Quack H., Quispe M., Racioppi A., Rafique H., Raginel V., Raidal M., Ramirez-Uribe N.S., Ramsey-Musolf M.J., Rata R., Ratoff P., Ravotti F., Rebello Teles P., Reboud M., Redaelli S., Renner E., Renteria-Olivo A.E., Rescigno M., Reuter J., Ribon A., Ricci A.M., Riegler W., Riemann S., Riemann B., Riemann T., Rifflet J.M., Rimmer R.A., Rinaldesi R., Rinolfi L., Rios Rubiras O., Risselada T., Rivetti A., Rivkin L., Rizzo T., Robens T., Robert F., Robson A.J., Rochepault E., Roda C., Rodrigo G., Rodriguez-Cahuantzi M., Rogan C., Roig M., Rojas-Torres S., Rojo J., Rolandi G., Rolando G., Roloff P., Romanenko A., Romanov A., Roncarolo F., Rosado Sanchez A., Rosaz G., Rossi L., Rossi A., Rossmanith R., Rousset B., Royon C., Ruan X., Ruehl I., Ruhlmann-Kleider V., Ruiz R., Rumyantsev L., Ruprecht R., Ryazanov A.I., Saba A., Sadykov R., Saez de Jauregui D., Sahin M., Sailer B., Saito M., Sala F., Salam G.P., Salfeld-Nebgen J., Salgado C.A., Salini S., Sallese J.M., Salmi T., Salzburger A., Sampayo O.A., Sanfilippo S., Santiago J., Santopinto E., Santoro R., Sanz Ull A., Sarasola X., Sarpun I.H., Sauvain M., Savelyeva S., Sawada R., Sborlini G.F.R., Schaffer A., Schaumann M., Schenk M., Scheuerlein C., Schienbein I., Schlenga K., Schmickler H., Schmidt R., Schoerling D., Schoning A., Schorner-Sadenius T., Schott M., Schulte D., Schwaller P., Schwanenberger C., Schwemling P., Schwerg N., Scibile L., Sciuto A., Scomparin E., Sebastiani C., Seeber B., Segreti M., Selva P., Selvaggi M., Senatore C., Senol A., Serin L., Serluca M., Serra N., Seryi A., Sestini L., Sfyrla A., Shaposhnikov M., Shaposhnikova E., Sharkov B.Y., Shatilov D., Shelton J., Shiltsev V., Shipsey I.P., Shirkov G.D., Shivaji A., Shwartz D., Sian T., Sidorov S., Siemko A., Silvestrini L., Simand N., Simon F., Singh B.K., Siodmok A., Sirois Y., Sirtori E., Sirvinskaite R., Sitar B., Sjostrand T., Skands P., Skordis E., Skovpen K., Skrzypek M., Slade E., Slavich P., Slovak R., Smaluk V., Smirnov V., Snoeys W., Soffi L., Sollander P., Solovyanov O., Soltveit H.K., Song H., Sopicki P., Sorbi M., Spallino L., Spannowsky M., Spataro B., Sphicas P., Spiesberger H., Spiller P., Spira M., Srivastava T., Stachel J., Stakia A., Stanyard J.L., Starchenko E., Starikov A.Y., Stasto A.M., Statera M., Steerenberg R., Steggemann J., Stenvall A., Stivanello F., Stockinger D., Stoel L.S., Stoger-Pollach M., Strauss B., Stuart M., Stupakov G., Su S., Sublet A., Sugita K., Sulak L., Sullivan M.K., Sultansoy S., Sumida T., Suzuki K., Sylva G., Syphers M.J., Sznajder A., Taborelli M., Tahir N.A., Takeuchi M., Tal Hod E., Tambasco C., Tanaka J., Tang K., Tapan I., Taroni S., Tartarelli G.F., Tassielli G., Tavian L., Taylor T.M., Taylor G.N., Teixeira A.M., Tejeda-Munoz G., Telnov V.I., Tenchini R., ten Kate H.H.J., Terashi K., Tesi A., Testa M., Tetrel C., Teytelman D., Thaler J., Thamm A., Thomas S., Tiirakari M.T., Tikhomirov V., Tikhonov D., Timko H., Tisserand V., Tkachenko L.M., Tkaczuk J., Tock J.P., Todd B., Todesco E., Tomas Garcia R., Tommasini D., Tonelli G., Toral F., Torims T., Torre R., Townsend Z., Trant R., Treille D., Trentadue L., Tricoli A., Tricomi A., Trischuk W., Tropin I.S., Tuchming B., Tudora A.A., Turbiarz B., Turk Cakir I., Turri M., Tydecks T., Usovitsch J., Uythoven J., Vaglio R., Valassi A., Valchkova F., Valdivia Garcia M.A., Valente P., Valente R.U., Valente-Feliciano A.-M., Valentino G., Vale Silva L., Valet J.M., Valizadeh R., Valle J.W.F., Vallecorsa S., Vallone G., van Leeuwen M., van Rienen U.H., van Riesen-Haupt L., Varasteh M., Vecchi L., Vedrine P., Velev G., Veness R., Ventura A., Venturini Delsolaro W., Verducci M., Verhaaren C.B., Vernieri C., Verweij A.P., Verwilligen O., Viazlo O., Vicini A., Viehhauser G., Vignaroli N., Vignolo M., Vitrano A., Vivarelli I., Vlachos S., Vogel M., Vogt D.M., Volkl V., Volkov P., Volpini G., von Ahnen J., Vorotnikov G., Voutsinas G.G., Vysotsky V., Wagner U., Wallny R., Wang L.-T., Wang R., Wang K., Ward B.F.L., Watson T.P., Watson N.K., Ws Z., Weiland C., Weinzierl S., Welsch C.P., Wenninger J., Widorski M., Wiedemann U.A., Wienands H.-U., Wilkinson G., Williams P.H., Winter A., Wohlfahrt A., Wojton T., Wollmann D., Womersley J., Woog D., Wu X., Wulzer A., Yanehsari M.K., Yang G., Yang H.J., Yao W.-M., Yazgan E., Yermolchik V., Yilmaz A., Yoo H.-D., Yost S.A., You T., Young C., Yu T.-T., Yu F., Zaborowska A., Zadeh S.G., Zahnd M., Zanetti M., Zanotto L., Zawiejski L., Zeiler P., Zerlauth M., Zernov S.M., Zevi Dell Porta G., Zhang Z., Zhang Y., Zhang C., Zhang H., Zhao Z., Zhong Y.-M., Zhou J., Zhou D., Zhuang P., Zick G., Zimmermann F., Zinn-Justin J., Zivkovic L., Zlobin A.V., Zobov M., Zupan J., Zurita J., BAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümü, Denizli, Haluk, TOBB ETU, Faculty of Engineering, Department of Electrical & Electronics Engineering, TOBB ETU, Faculty of Engineering, Department of Material Science & Nanotechnology Engineering, TOBB ETÜ, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü, TOBB ETÜ, Mühendislik Fakültesi, Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü, Bozbey, Ali, Sultansoy, Saleh, Özdemir, Kadri, Giresun Üniversitesi, UCL - SST/IRMP - Institut de recherche en mathématique et physique, and Ege Üniversitesi

Subjects
Beam losses, IMPACT, Physics::Instrumentation and Detectors, Physics beyond the Standard Model, EVENT BUILDER, hadron collider, General Physics and Astronomy, Mathematics and natural science: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP], 01 natural sciences, 7. Clean energy, law.invention, Subatomär fysik, chemistry.chemical_compound, Conceptual design, Colliding beam accelerators, law, HE-LHC, Subatomic Physics, General Materials Science, Hadron colliders, Física::Física de partícules::Hadrons [Àrees temàtiques de la UPC], Large Hadron Collider, Acceleradors de partícules, Physics, Settore FIS/01 - Fisica Sperimentale, Beams (radiation), Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici, Upgrade, Impact, collimators, partikkelfysikk, Future Circular Collider, High-Energy, Systems engineering, HE-LHC: The High-Energy Large Hadron Collider, Col·lisionadors d'hadrons, Applied physics, Collimators, Socio-culturale, Fizik, Hadrons, Accelerator Physics and Instrumentation, HE-LHC physics, Condensed Matter::Materials Science, 0103 physical sciences, Physics::Atomic and Molecular Clusters, beam losses, ddc:530, High Energy Physics, partikkelakselerator, Physical and Theoretical Chemistry, Niobium-tin, 010306 general physics, Collider, Particle Physics, Beams (radiation) | Collimators | Beam losses, Energies::Energia nuclear [Àrees temàtiques de la UPC], Large Hadron Collider HE-LHC, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Colliders (Nuclear physics), Acceleratorfysik och instrumentering, Event builder, Accelerators and Storage Rings, Particle accelerators, chemistry, Experimental High Energy Physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Future Colliders
Abstract

Authors: A. AbadaM. AbbresciaS. S. AbdusSalamI. AbdyukhanovJ. Abelleira FernandezA. AbramovM. AburaiaA. O. AcarP. R. AdzicP. AgrawalJ. A. Aguilar-SaavedraJ. J. Aguilera-VerdugoM. AibaI. AichingerG. AielliA. AkayA. AkhundovH. AksakalJ. L. AlbaceteS. AlbergoA. AlekouM. AleksaR. AleksanR. M. Alemany FernandezY. AlexahinR. G. AlíaS. AlioliN. Alipour TehraniB. C. AllanachP. P. AllportM. AltınlıW. AltmannshoferG. AmbrosioD. AmorimO. AmstutzL. AnderliniA. AndreazzaM. AndreiniA. AndriatisC. AndrisA. AndronicM. AngelucciF. AntinoriS. A. AntipovM. AntonelliM. AntonelloP. AntonioliS. AntuschF. AnulliL. ApolinárioG. ApollinariA. ApollonioD. AppelöR. B. ApplebyA. ApyanA. ApyanA. ArbeyA. ArbuzovG. ArduiniV. ArıS. AriasN. ArmestoR. ArnaldiS. A. ArsenyevM. ArzeoS. AsaiE. AslanidesR. W. AßmannD. AstapovychM. AtanasovS. AtiehD. AttiéB. AuchmannA. AudurierS. AullS. AumonS. AuneF. AvinoG. AvrillaudG. AydınA. AzatovG. AzuelosP. AzziO. AzzoliniP. AzzurriN. BacchettaE. BacchiocchiH. BachacouY. W. BaekV. BaglinY. BaiS. BairdM. J. BakerM. J. BaldwinA. H. BallA. BallarinoS. BanerjeeD. P. BarberD. BarducciP. BarjhouxD. BarnaG. G. BarnaföldiM. J. BarnesA. BarrJ. Barranco GarcíaJ. Barreiro Guimarães da CostaW. BartmannV. BaryshevskyE. BarziS. A. BassA. BastianinB. BaudouyF. BauerM. BauerT. BaumgartnerI. Bautista-GuzmánC. BayındırF. BeaudetteF. BedeschiM. BéguinI. BellafontL. BellagambaN. BellegardeE. BelliE. BellingeriF. BelliniG. BellomoS. BelomestnykhG. BencivenniM. BenediktG. BernardiJ. BernardiC. BernetJ. M. BernhardtC. BerniniC. BerriaudA. BertarelliS. BertolucciM. I. BesanaM. BesançonO. BeznosovP. BhatC. BhatM. E. BiaginiJ. -L. BiarrotteA. Bibet ChevalierE. R. BielertM. BigliettiG. M. BileiB. BilkiC. BiscariF. BisharaO. R. Blanco-GarcíaF. R. BlánquezF. BlekmanA. BlondelJ. BlümleinT. BoccaliR. BoelsS. A. BogaczA. BogomyagkovO. Boine-FrankenheimM. J. BolandS. BolognaO. BolukbasiM. BombenS. BondarenkoM. BonviniE. BoosB. BordiniF. BordryG. BorghelloL. BorgonoviS. BorowkaD. BortolettoD. BoscheriniM. BoscoloS. BoselliR. R. BosleyF. BossuC. BottaL. BotturaR. BoughezalD. BoutinG. BovoneI. Božović JelisavićA. BozbeyC. BozziD. BozziniV. BracciniS. Braibant-GiacomelliJ. BramanteP. Braun-MunzingerJ. A. BriffaD. BritzgerS. J. BrodskyJ. J. BrookeR. BruceP. Brückman De RenstromE. BrunaO. BrüningO. BrunnerK. BrunnerP. BruzzoneX. BuffatE. BulyakF. BurkartH. BurkhardtJ. -P. BurnetF. ButinD. ButtazzoA. ButterworthM. CacciaY. CaiB. CaiffiV. CairoO. CakirR. CalagaS. CalatroniG. CalderiniG. CalderolaA. CaliskanD. CalvetM. CalvianiJ. M. CamalichP. CamarriM. CampanelliT. CamporesiA. C. CanbayA. CanepaE. CantergianiD. Cantore-CavalliM. CapeansR. CardarelliU. CardellaA. CardiniC. M. Carloni CalameF. CarraS. CarraA. CarvalhoS. CasalbuoniJ. CasasM. CascellaP. CastelnovoG. CastorinaG. CatalanoV. CavasinniE. CazzatoE. CenniniA. CerriF. CeruttiJ. CervantesI. ChaikovskaJ. ChakraborttyM. ChalaM. Chamizo-LlatasH. ChanalD. ChanalS. ChanceA. ChancéP. CharitosJ. CharlesT. K. CharlesS. ChattopadhyayR. ChehabS. V. ChekanovN. ChenA. ChernodedV. ChetvertkovaL. ChevalierG. ChiarelliG. ChiarelloM. ChiesaP. ChiggiatoJ. T. ChildersA. ChmielińskaA. CholakianP. ChomazM. ChorowskiW. ChouM. ChrzaszczE. ChyhyrynetsG. CibinettoA. K. CiftciR. CiftciR. CiminoM. CiuchiniP. J. ClarkY. CoadouM. CobalA. CoccaroJ. CoganE. CognerasF. CollamatiC. ColldelramP. CollierJ. CollotR. ContinoF. ConventiC. T. A. CookL. CooleyG. CorcellaA. S. CornellG. H. CorralH. Correia-RodriguesF. CostanzaP. Costa PintoF. CoudercJ. CoupardN. CraigI. Crespo GarridoA. CrivellinJ. F. CroteauM. CrouchE. Cruz AlanizB. CuréJ. CurtiD. CurtinM. CzechC. DachauerR. T. D’AgnoloM. DaiboA. DaineseB. DalenaA. DaljevecW. DallapiazzaL. D’Aloia SchwartzentruberM. DamG. D’AmbrosioS. P. DasS. DasBakshiW. da SilvaG. G. da SilveiraV. D’AuriaS. D’AuriaA. DavidT. DavidekA. DeandreaJ. de BlasC. J. DebonoS. De CurtisN. De FilippisD. de FlorianS. DeghayeS. J. de JongC. Del BoV. Del DucaD. DelikarisF. DeliotA. Dell’AcquaL. Delle RoseM. DelmastroE. De LuciaM. DemarteauD. DenegriL. DeniauD. DenisovH. DenizliA. DennerD. d’EnterriaG. de RijkA. De RoeckF. DerueO. DeschampsS. Descotes-GenonP. S. B. DevJ. B. de Vivie de RégieR. K. DewanjeeA. Di CiaccioA. Di CiccoB. M. DillonB. Di MiccoP. Di NezzaS. Di VitaA. DoblhammerA. DominjonM. D’OnofrioF. DordeiA. DragoP. DraperZ. DrasalM. DrewesL. DuarteI. DubovykP. DudaA. DudarevL. DudkoD. DuellmannM. DünserT. du PreeM. DuranteH. Duran YildizS. DuttaF. DuvalJ. M. DuvalY. DydyshkaB. DziewitS. EisenhardtM. EistererT. EkelofD. El KhechenS. A. EllisJ. EllisJ. A. EllisonK. ElsenerM. ElsingY. EnariC. EnglertH. ErikssonK. J. EskolaL. S. EspositoO. EtiskenE. EtzionP. FabbricatoreA. FalkowskiA. FalouJ. FaltovaJ. FanL. FanòA. FarillaR. FarinelliS. FarinonD. A. FaroughyS. D. FartoukhA. Faus-GolfeW. J. FawcettG. FeliciL. FelsbergerC. FerdeghiniA. M. Fernandez NavarroA. Fernández-TéllezJ. Ferradas TroitinoG. FerraraR. FerrariL. FerreiraP. Ferreira da SilvaG. FerreraF. FerroM. FiascarisS. FiorendiC. FiorioO. FischerE. FischerW. FliegerM. FlorioD. FonnesuE. FontanesiN. FoppianiK. ForazD. Forkel-WirthS. ForteM. FouaidyD. FournierT. FowlerJ. FoxP. FrancavillaR. FranceschiniS. FranchinoE. FrancoA. FreitasB. FuksK. FurukawaS. V. FurusethE. GabrielliA. GaddiM. GalantiE. GalloS. GanjourJ. GaoJ. GaoV. Garcia DiazM. García PérezL. García TabarésC. GarionM. V. GarzelliI. GarziaS. M. Gascon-ShotkinG. GaudioP. GayS. -F. GeT. GehrmannM. H. GenestR. GerardF. GerigkH. GerwigP. GiacomelliS. GiaguE. Gianfelice-WendtF. GianottiF. GiffoniS. S. GilardoniM. Gil CostaM. GiovannettiM. GiovannozziP. GiubellinoG. F. GiudiceA. GiuntaL. K. GladilinS. GlukhovJ. GluzaG. GobbiB. GoddardF. GoertzT. GollingV. P. GoncalvesR. GonçaloL. A. Gonzalez GomezS. Gorgi ZadehG. GorineE. GoriniS. A. GourlayL. GouskosF. GrancagnoloA. GrassellinoA. GrauE. GraveriniH. M. GrayMa. GrecoMi. GrecoJ. -L. GrenardO. GrimmC. GrojeanV. A. GromovJ. F. Grosse-OetringhausA. GrudievK. GrzankaJ. GuD. GuadagnoliV. GuidiS. GuiducciG. Guillermo CantonY. O. GünaydinR. GuptaR. S. GuptaJ. GutierrezJ. GutleberC. GuyotV. GuzeyC. GwenlanC. HaberstrohB. HacışahinoğluB. HaererK. HahnT. HahnA. HammadC. HanM. HanceA. HannahP. C. HarrisC. HatiS. HaugJ. HauptmanV. HaurylavetsH. -J. HeA. HegglinB. HegnerK. HeinemannS. HeinemeyerC. HelsensA. HenriquesA. HenriquesP. HernandezR. J. Hernández-PintoJ. Hernandez-SanchezT. HerzigI. HiekkanenW. HillertT. HoehnM. HoferW. HöfleF. HoldenerS. HolleisB. HolzerD. K. HongC. G. HonoratoS. C. HopkinsJ. HrdinkaF. HugB. HumannH. HumerT. HurthA. HuttonG. IacobucciN. IbarrolaL. Iconomidou-FayardK. Ilyina-BrunnerJ. IncandelaA. InfantinoV. IppolitoM. IshinoR. IslamH. ItaA. IvanovsS. IwamotoA. IyerS. Izquierdo BermudezS. JadachD. O. JaminP. JanotP. JarryA. JeffP. JennyE. JensenM. JensenX. JiangJ. M. JiménezM. A. JonesO. R. JonesJ. M. JowettS. JungW. KaabiM. KadoK. KahleL. KalinovskayaJ. KalinowskiJ. F. KamenikK. KannikeS. O. KaraH. KaradenizV. KaraventzasI. KarpovS. KartalA. KaryukhinV. KashikhinJ. Katharina BehrU. KayaJ. KeintzelP. A. KeinzK. KeppelR. KersevanK. KershawH. KhanpourS. KhatibiM. Khatiri YanehsariV. V. KhozeJ. KieselerA. KilicA. KilpinenY. -K. KimD. W. KimU. KleinM. KleinF. KlingN. KlinkenbergS. KlöppelM. KluteV. I. KlyukhinM. KnechtB. KniehlF. KocakC. KoeberlA. M. KolanoA. KolleggerK. KołodziejA. A. KolomietsJ. KomppulaI. KoopP. KoppenburgM. KoratzinosM. KordiaczyńskaM. KorjikO. KortnerP. KostkaW. KotlarskiC. KotnigT. KöttigA. V. KotwalA. D. KovalenkoS. KowalskiJ. KozaczukG. A. KozlovS. S. KozubA. M. KrainerT. KramerM. KrämerM. KrammerA. A. KrasnovF. KraussK. KravalisL. KretzschmarR. M. KriskeH. KritscherP. KrkoticH. KrohaM. KucharczykS. KudayA. KuendigG. KuhlmannA. KuleszaM. KumarM. KumarA. KusinaS. KuttimalaiM. KuzeT. KwonF. LacknerM. LacknerE. La FrancescaM. LaineG. LamannaS. La MendolaE. LançonG. LandsbergP. LangackerC. LangeA. LangnerA. J. LankfordJ. P. LansbergT. LariP. J. LaycockP. LebrunA. LechnerK. LeeS. LeeR. LeeT. LefevreP. Le GuenT. LehtinenS. B. LeithP. LenziE. LeograndeC. LeonidopoulosI. Leon-MonzonG. LernerO. LeroyT. LesiakP. LévaiA. LeverattoE. LevichevG. LiS. LiR. LiD. LiberatiM. LiepeD. A. LissauerZ. LiuA. LobkoE. LocciE. Logothetis AgaliotisM. P. LombardoA. J. LongC. LorinR. LositoA. LouzguitiI. LowD. LucchesiM. T. LucchiniA. LucianiM. LueckhofA. J. G. LuntM. LuzumD. A. LyubimtsevM. MaggioraN. MagninM. A. MahmoudF. MahmoudiJ. MaitreV. MakarenkoA. MalagoliJ. MalclésL. MalgeriP. J. MallonF. MaltoniS. MalvezziO. B. MalyshevG. MancinelliP. MandrikP. ManfrinettiM. ManganoP. ManilM. MannelliG. MarchioriF. MarhauserV. MarianiV. MarinozziS. MariottoP. MarquardC. MarquetT. Marriott-DodingtonR. MartinO. MartinJ. Martin CamalichT. MartinezH. Martinez BruzualM. I. Martínez-HernándezD. E. MartinsS. MarzaniD. MarzoccaL. MarzolaS. MasciocchiI. MasinaA. MassimilianoA. MassironiT. MasubuchiV. A. MatveevM. A. MazzoniM. McCulloughP. A. McIntoshP. MeadeL. MedinaA. MeierJ. MeignanB. MeleJ. G. Mendes SaraivaF. MenezM. MentinkE. MeoniP. MeridianiM. MerkP. MermodV. MertensL. MetherE. MétralM. MiglioratiA. MilaneseC. MilardiG. MilhanoB. L. MilitsynF. MilletI. MinashviliJ. V. MinerviniL. S. MirallesD. MirarchiS. MishimaD. P. MissiaenG. MitselmakherT. MitshuhashiJ. MnichM. Mohammadi NajafabadiR. N. MohapatraN. MokhovJ. G. MolsonR. MongeC. MontagG. MontagnaS. MonteilG. MonteneroE. MontesinosF. MoortgatN. MorangeG. MorelloM. Moreno LlácerM. MorettiS. MorettiA. K. MorleyA. MorosI. MorozovV. MorrettaM. MorroneA. MostacciS. MuanzaN. MuchnoiM. MühleggerM. MulderM. MuldersB. MüllerF. MüllerA. -S. MüllerJ. MunillaM. J. MurrayY. MuttoniS. MyersM. MylonaJ. NachtmanT. NakamotoM. NardecchiaG. NardiniP. NasonZ. NergizA. V. NesterenkoJ. A. NettoA. NettsträterC. NeubüserJ. NeundorfF. NiccoliO. NicrosiniY. NieU. NiedermayerJ. NiedzielaA. NiemiS. A. NikitinA. NisatiJ. M. NoM. NonisY. NosochkovM. NovákA. NovokhatskiJ. M. O’CallaghanC. OchandoS. OgurK. OhmiK. OideV. A. OkorokovY. OkumuraC. OleariF. I. OlnessY. OnelM. OrtinoJ. OsborneP. OslandT. OttoK. Y. OyulmazA. OzansoyV. ÖzcanK. ÖzdemirC. E. PagliaroneH. F. Pais da SilvaE. PalmieriL. PalumboA. PampaloniR. -Q. PanM. PanareoO. PanellaG. PanicoG. PanizzoA. A. PankovV. PantsyrnyC. G. PapadopoulosA. PapaefstathiouY. PapaphilippouM. A. ParkerV. ParmaM. PasqualiS. K. PatraR. PattersonH. PaukkunenF. PaussS. PeggsJ. -P. PenttinenG. PeónE. E. PerepelkinE. PerezJ. C. PerezG. PerezF. PérezE. Perez CodinaJ. Perez MoralesM. PerfilovH. PerneggerM. PeruzziC. PesK. PetersS. PetraccaF. PetrielloL. PezzottiS. PfeifferF. PiccininiT. PieloniM. PieriniH. PikhartovaG. PikursE. PilicerP. PiminovC. PiraR. PittauW. PłaczekM. PlaggeT. PlehnM. -A. PleierM. PłoskońM. PodeurH. PodlechT. PodzornyL. PoggioliA. PoironG. PoleselloM. Poli LenerA. PoliniJ. PolinskiS. M. PolozovL. PonceM. PontL. PontecorvoT. PortaluriK. PotamianosC. PrasseM. PrausaA. PreinerstorferE. PrematT. PriceM. PrimaveraF. PrinoM. PrioliJ. ProudfootA. ProvinoT. PugnatN. PukhaevaS. PuławskiD. PulikowskiG. PunziM. PuttiA. PyarelalH. QuackM. QuispeA. RacioppiH. RafiqueV. RaginelM. RaidalN. S. Ramírez-UribeM. J. Ramsey-MusolfR. RataP. RatoffF. RavottiP. Rebello TelesM. ReboudS. RedaelliE. RennerA. E. Rentería-OlivoM. RescignoJ. ReuterA. RibonA. M. RicciW. RieglerS. RiemannB. RiemannT. RiemannJ. M. RiffletR. A. RimmerR. RinaldesiL. RinolfiO. Rios RubirasT. RisseladaA. RivettiL. RivkinT. RizzoT. RobensF. RobertA. J. RobsonE. RochepaultC. RodaG. RodrigoM. Rodríguez-CahuantziC. RoganM. RoigS. Rojas-TorresJ. RojoG. RolandiG. RolandoP. RoloffA. RomanenkoA. RomanovF. RoncaroloA. Rosado SanchezG. RosazL. RossiA. RossiR. RossmanithB. RoussetC. RoyonX. RuanI. RuehlV. Ruhlmann-KleiderR. RuizL. RumyantsevR. RuprechtA. I. RyazanovA. SabaR. SadykovD. Saez de JaureguiM. SahinB. SailerM. SaitoF. SalaG. P. SalamJ. Salfeld-NebgenC. A. SalgadoS. SaliniJ. M. SalleseT. SalmiA. SalzburgerO. A. SampayoS. SanfilippoJ. SantiagoE. SantopintoR. SantoroA. Sanz UllX. SarasolaI. H. SarpünM. SauvainS. SavelyevaR. SawadaG. F. R. SborliniA. SchafferM. SchaumannM. SchenkC. ScheuerleinI. SchienbeinK. SchlengaH. SchmicklerR. SchmidtD. SchoerlingA. SchoningT. Schörner-SadeniusM. SchottD. SchulteP. SchwallerC. SchwanenbergerP. SchwemlingN. SchwergL. ScibileA. SciutoE. ScomparinC. SebastianiB. SeeberM. SegretiP. SelvaM. SelvaggiC. SenatoreA. SenolL. SerinM. SerlucaN. SerraA. SeryiL. SestiniA. SfyrlaM. ShaposhnikovE. ShaposhnikovaB. Y. SharkovD. ShatilovJ. SheltonV. ShiltsevI. P. ShipseyG. D. ShirkovA. ShivajiD. ShwartzT. SianS. SidorovA. SiemkoL. SilvestriniN. SimandF. SimonB. K. SinghA. SiódmokY. SiroisE. SirtoriR. SirvinskaiteB. SitarT. SjöstrandP. SkandsE. SkordisK. SkovpenM. SkrzypekE. SladeP. SlavichR. SlovakV. SmalukV. SmirnovW. SnoeysL. SoffiP. SollanderO. SolovyanovH. K. SoltveitH. SongP. SopickiM. SorbiL. SpallinoM. SpannowskyB. SpataroP. SphicasH. SpiesbergerP. SpillerM. SpiraT. SrivastavaJ. StachelA. StakiaJ. L. StanyardE. StarchenkoA. Y. StarikovA. M. StaśtoM. StateraR. SteerenbergJ. SteggemannA. StenvallF. StivanelloD. StöckingerL. S. StoelM. Stöger-PollachB. StraussM. StuartG. StupakovS. SuA. SubletK. SugitaL. SulakM. K. SullivanS. SultansoyT. SumidaK. SuzukiG. SylvaM. J. SyphersA. SznajderM. TaborelliN. A. TahirM. TakeuchiE. Tal HodC. TambascoJ. TanakaK. TangI. TapanS. TaroniG. F. TartarelliG. TassielliL. TavianT. M. TaylorG. N. TaylorA. M. TeixeiraG. Tejeda-MuñozV. I. TelnovR. TenchiniH. H. J. ten KateK. TerashiA. TesiM. TestaC. TetrelD. TeytelmanJ. ThalerA. ThammS. ThomasM. T. TiirakariV. TikhomirovD. TikhonovH. TimkoV. TisserandL. M. TkachenkoJ. TkaczukJ. P. TockB. ToddE. TodescoR. Tomás GarciaD. TommasiniG. TonelliF. ToralT. TorimsR. TorreZ. TownsendR. TrantD. TreilleL. TrentadueA. TricoliA. TricomiW. TrischukI. S. TropinB. TuchmingA. A. TudoraB. TurbiarzI. Turk CakirM. TurriT. TydecksJ. UsovitschJ. UythovenR. VaglioA. ValassiF. ValchkovaM. A. Valdivia GarciaP. ValenteR. U. ValenteA. -M. Valente-FelicianoG. ValentinoL. Vale SilvaJ. M. ValetR. ValizadehJ. W. F. ValleS. VallecorsaG. ValloneM. van LeeuwenU. H. van RienenL. van Riesen-HauptM. VarastehL. VecchiP. VedrineG. VelevR. VenessA. VenturaW. Venturini DelsolaroM. VerducciC. B. VerhaarenC. VernieriA. P. VerweijO. VerwilligenO. ViazloA. ViciniG. ViehhauserN. VignaroliM. VignoloA. VitranoI. VivarelliS. VlachosM. VogelD. M. VogtV. VölklP. VolkovG. VolpiniJ. von AhnenG. VorotnikovG. G. VoutsinasV. VysotskyU. WagnerR. WallnyL. -T. WangR. WangK. WangB. F. L. WardT. P. WatsonN. K. WatsonZ. WsC. WeilandS. WeinzierlC. P. WelschJ. WenningerM. WidorskiU. A. WiedemannH. -U. WienandsG. WilkinsonP. H. WilliamsA. WinterA. WohlfahrtT. WojtońD. WollmannJ. WomersleyD. WoogX. WuA. WulzerM. K. YanehsariG. YangH. J. YangW. -M. YaoE. YazganV. YermolchikA. YilmazA. YilmazH. -D. YooS. A. YostT. YouC. YoungT. -T. YuF. YuA. ZaborowskaS. G. ZadehM. ZahndM. ZanettiL. ZanottoL. ZawiejskiP. ZeilerM. ZerlauthS. M. ZernovG. Zevi Dell PortaZ. ZhangY. ZhangC. ZhangH. ZhangZ. ZhaoY. -M. ZhongJ. ZhouD. ZhouP. ZhuangG. ZickF. ZimmermannEmail authorJ. Zinn-JustinL. ZivkovicA. V. ZlobinM. ZobovJ. ZupanJ. Zuritathe FCC Collaboration, In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider (FCC-hh), a highest-luminosity high-energy lepton collider (FCC-ee), the corresponding 100km tunnel infrastructure, as well as the physics opportunities of these two colliders, and a high-energy LHC, based on FCC-hh technology. This document constitutes the fourth volume of the FCC Conceptual Design Report, devoted to the High-Energy Large Hadron Collider HE-LHC. It summarizes the HE-LHC physics discovery opportunities, presents the HE-LHC accelerator design, performance reach, and operation plan, discusses the underlying technologies, the civil engineering and technical infrastructure, and also sketches a possible implementation. Combining ingredients from the Large Hadron Collider (LHC), the high-luminosity LHC upgrade and adding novel technologies and approaches, the HE-LHC design aims at a hadron collider with about twice the centre-of-mass collision energy that the LHC can reach. Its performance aims at exploring physics beyond the Standard Model, signi cantly extending the LHC's direct and indirect sensitivity to new physics and discoveries.

Published
2020

40. Overview of the Quench Heater Performance for MQXF, the Nb3Sn Low- β Quadrupole for the High Luminosity LHC

Author

Ezio Todesco, C Santini, Jose Ferradas Troitino, GianLuca Sabbi, Guram Chlachidze, Giorgio Vallone, Susana Izquierdo Bermudez, E. Ravaioli, S. Stoynev, Giorgio Ambrosio, Francois-Olivier Pincot, Juan Carlos Perez, Nicolas Bourcey, Hugues Bajas, and Paolo Ferracin

Subjects
Coupling loss, Large Hadron Collider, Materials science, 010308 nuclear & particles physics, Nuclear engineering, Particle accelerator, Superconducting magnet, STRIPS, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, law.invention, chemistry.chemical_compound, chemistry, law, Electromagnetic coil, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, Niobium-tin, 010306 general physics
Abstract

In the framework of the high-luminosity upgrade of the Large Hadron Collider, the U.S. LARP collaboration and CERN are jointly developing a 150 mm aperture Nb3Sn quadrupole for the LHC interaction regions. Due to the large stored energy density and the low copper stabilizer section, the quench protection of these magnets is particularly challenging, relying on a combination of quench heaters attached to the coil surface and coupling loss induced quench (CLIQ) units electrically connected to the coils. This paper summarizes the performance of the quench heater strips in different configurations relevant to machine operation. The analysis is focused on the inner layer quench heaters, where several heater strips failed during powering tests. Failure modes are discussed in order to address the technology issues and provide guidance for future tests.

Published
2018

41. Construction and Cold Test of the Superferric Octupole for the LHC Luminosity Upgrade

Author

Maurizio Todero, Carlo Uva, Massimo Sorbi, F. Alessandria, Ezio Todesco, D. Pedrini, Andrea Musso, Vittorio Marinozzi, F. Broggi, Paolo Fessia, Mauro Quadrio, Antonio Paccalini, Samuele Mariotto, Marco Statera, and Augusto Leone

Subjects
Physics, Large Hadron Collider, High Luminosity Large Hadron Collider, Superconducting magnet, Luminosity upgrade, Series production, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Nuclear physics, Cold test, Magnet, 0103 physical sciences, Physics::Accelerator Physics, Electrical and Electronic Engineering, 010306 general physics
Abstract

The National Institute for Nuclear Physics (INFN) is developing at the Laboratory of Accelerators and Applied Superconductivity (LASA) laboratory (Milano, Italy) the prototypes of five corrector magnets, from skew quadrupole to dodecapole, which will equip the high-luminosity interaction regions of the High Luminosity Large Hadron Collider (HL-LHC). These magnets are based on a superferric design, which allows a relatively simple, compact, and easy to construct magnet. This activity takes place within the framework of a collaboration agreement between European Organization for Nuclear Research (CERN) and INFN. The first prototypes, a sextupole and an octupole, have been tested in 2016 and 2017, respectively. We present here the results of the cold tests of the decapole that has been assembled and tested in the second half of 2017, including the training performed at 4.2 K and the qualification at 2.17 K. We report also on the overall experience gained during construction and tests and the improvements toward the series production. Other important results concern quench studies.

Published
2018

42. Progress on HL-LHC Nb3Sn Magnets

Author

R. Bossert, S. Izquierdo Bermudez, Luca Bottura, Daniel W. Cheng, Gerard Willering, Amalia Ballarino, Soren Prestemon, Giorgio Apollinari, J. Fleiter, Marta Bajko, S. Stoynev, Giorgio Ambrosio, Tiina Salmi, Maxim Marchevsky, Bernardo Bordini, Xiaorong Wang, Thomas Strauss, Guram Chlachidze, Giorgio Vallone, Ezio Todesco, GianLuca Sabbi, Hugues Bajas, M. Annarella, Paolo Ferracin, A.R. Hafalia, Frederic Savary, C. Loeffler, E. Ravaioli, J. Schmalzle, Eddie Frank Holik, Michael Guinchard, E Cavanna, Juan Carlos Perez, M.A. Tartaglia, P. Wanderer, Joseph DiMarco, Gueorgui Velev, M. Yu, Lucio Rossi, Alfred Nobrega, Gijs de Rijk, and Friedrich Lackner

Subjects
Physics, Large Hadron Collider, Interaction point, 020208 electrical & electronic engineering, Mechanical engineering, 02 engineering and technology, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Dipole, Upgrade, chemistry, Electromagnetic coil, Magnet, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Physics::Accelerator Physics, Electrical and Electronic Engineering, Niobium-tin, 010306 general physics
Abstract

The high-luminosity Large Hadron Collider (HL-LHC) project aims at allowing to increase the collisions in the LHC by a factor of ten in the decade 2025-2035. One essential element is the superconducting magnet around the interaction region points, where the large aperture magnets will be installed to allow to further reduce the beam size in the interaction point. The core of this upgrade is the Nb3Sn triplet, made up of 150-mm aperture quadrupoles in the range of 7-8 m. The project is being shared between the European Organization for Nuclear Research and the US Accelerator Upgrade Program, based on the same design, and on the two strand technologies. The project is ending the short model phase, and entering the prototype construction. We will report on the main results of the short model program, including the quench performance and field quality. A second important element is the 11 T dipole that replaces a standard dipole making space for additional collimators. The magnet is also ending the model development and entering the prototype phase. A critical point in the design of this magnet is the large current density, allowing increase of the field from 8 to 11 T with the same coil cross section as in the LHC dipoles. This is also the first two-in-one Nb3Sn magnet developed so far. We will report the main results on the test and the critical aspects.

Published
2018

43. Status of the Activity for the Construction of the HL-LHC Superconducting High Order Corrector Magnets at LASA-Milan

Author

D. Pedrini, Augusto Leone, Maurizio Todero, Marco Statera, Giovanni Bellomo, Carlo Uva, Andrea Musso, Samuele Mariotto, Massimo Sorbi, Antonio Paccalini, F. Alessandria, Mauro Quadrio, Ezio Todesco, F. Broggi, and Vittorio Marinozzi

Subjects
010302 applied physics, Large Hadron Collider, Physics::Instrumentation and Detectors, business.industry, Computer science, Skew, Electrical engineering, Superconducting magnet, Modular design, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Magnet, 0103 physical sciences, Physics::Accelerator Physics, Electrical and Electronic Engineering, High order, 010306 general physics, business
Abstract

INFN is developing at LASA Laboratory (Milano, Italy) the prototypes of five corrector magnets, from skew quadrupole to dodecapole, which will equip the high-luminosity interaction regions (IRs) of the High Luminosity-LHC (HL-LHC). These magnets are based on a superferric design, to allow a relatively simple, modular, and easy to construct magnet. This program takes place within the framework of a collaboration agreement between CERN and INFN. In this paper, we present an overview of the activity, from the design, to the construction and test at the operation condition.

Published
2018

44. Geometric Field Errors of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the High Luminosity LHC

Author

Stoyan Stoynev, Eddie Frank Holik, Lucio Fiscarelli, GianLuca Sabbi, Joseph Di Marco, Per Espen Hagen, Ezio Todesco, Hugues Bajas, Susana Izquierdo Bermudez, Paolo Ferracin, Jose Ferradas Troitino, Xiaorong Wang, Guram Chlachidze, Giorgio Vallone, and Giorgio Ambrosio

Subjects
Physics, General Physics, Large Hadron Collider, Field (physics), High luminosity large hadron collider, 010308 nuclear & particles physics, Aperture, field quality, Materials Engineering, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Nuclear physics, Electromagnetic coil, magnetic measurements, Harmonics, Magnet, 0103 physical sciences, Quadrupole, Electrical and Electronic Engineering, 010306 general physics, high field Nb3Sn magnet
Abstract

In the framework of the high-luminosity upgrade of the large hadron collider, the U.S. LARP collaboration and CERN are jointly developing a 150-mm aperture Nb3Sn quadrupole for the Large Hadron Collider (LHC) interaction regions. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging targets for field quality at nominal operation conditions. Three short model magnets have been tested and around 30 coils have been built, allowing a first analysis of the reproducibility of the coil size and turns positioning. The impact of the coil shimming on field quality is evaluated, with special emphasis on the warm magnetic measurements and the correlation to field measurements at cold and nominal field. The variability of the field harmonics along the magnet axis is studied by means of a Monte-Carlo analysis and the effects of the corrective actions implemented to suppress the low-order unallowed multipoles are discussed.

Published
2018

45. Training Performance With Increased Coil Prestress of the 2 m Model Magnet of Beam Separation Dipole for the HL-LHC Upgrade

Author

Ryutaro Okada, Nobuhiro Kimura, Naoki Okada, Hiroshi Kawamata, Kazuhide Tanaka, Kento Suzuki, M. Iida, Ezio Todesco, Naoya Takahashi, Y. Ikemoto, Michinaka Sugano, Tatsushi Nakamoto, Shun Enomoto, Andrea Musso, Norio Higashi, K. Sasaki, Toru Ogitsu, and Hirokatsu Ohata

Subjects
010302 applied physics, Physics, Beam diameter, Large Hadron Collider, Nuclear engineering, Magnetic separation, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Dipole, Nuclear magnetic resonance, Electromagnetic coil, Dipole magnet, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics
Abstract

A large aperture beam separation dipole (D1 magnet) is required to generate a field integral of 35 Tm at 12 kA and 1.9 K for the high luminosity upgrade of the large hadron collider (HL-LHC). High-energy accelerator Research Organization (KEK) fabricated the first 2 m model (MBXFS1) and a magnet test was performed in 2015–2016. Although the quench current reached the nominal operating current, training performance was not satisfactory. The measured azimuthal coil pre-stress was completely released below the nominal current, and this was suggested to be the main reason for the insufficient training performance. After the magnet test, MBXFS1 was disassembled and reassembled as MBXFS1b after increasing the coil pre-stress. In this paper, we report the reassembly of the magnet and test results focusing on the training performance.

Published
2018

46. A Statistical Analysis of Electrical Faults in the LHC Superconducting Magnets and Circuits

Author

F. Rodriguez-Mateos, M. Bednarek, Christian Scheuerlein, Mirko Pojer, Iván Romera, Bernard Auchmann, Matthias Mentink, Ezio Todesco, A. Perin, Z. Charifoulline, Attilio Milanese, V. Montabonnet, Andrzej Siemko, Sandrine Le Naour, Daniel Wollmann, Jens Steckert, Arjan Verweij, Gerard Willering, Per Espen Hagen, Daniel Calcoen, G. J. Coelingh, Markus Zerlauth, Luca Bottura, Michele Modena, Matteo Solfaroli, R. Schmidt, G. D'Angelo, and J. P. Tock

Subjects
Superconductivity, Large Hadron Collider, Computer science, business.industry, Electrical engineering, Integrated circuit, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, Electronic, Optical and Magnetic Materials, law.invention, Magnetic circuit, law, Magnet, 0103 physical sciences, Instrumentation (computer programming), Electrical and Electronic Engineering, 010306 general physics, business, Electronic circuit
Abstract

The large hadron collider (LHC) at CERN has been operating and generating physics experimental data since September 2008, and following its first long shut down, it has entered a second, 4-year-long physics run. It is to date the largest superconducting installation ever built, counting over 9000 magnets along its 27-km long circumference. A significant operational experience has been accumulated, including the occurrence and consequences of electrical faults at the level of the superconducting magnets, as well as their protection and instrumentation circuits. The purpose of this paper is to provide a first overview of the most common electrical faults and their frequency of occurrence in the first years of operation, and to perform a statistical analysis that can provide reference values for future productions of similar dimensions and nature.

Published
2018

47. Training of the Main Dipoles Magnets in the Large Hadron Collider Toward 7 TeV Operation

Author

Ezio Todesco, G. de Rijk, Marta Bajko, Per Espen Hagen, Gerard Willering, L. Bottura, Davide Tommasini, S. Le Naour, D. Mapelli, R. Schmidt, Oliver Brüning, Juan Carlos Perez, Paolo Fessia, Arjan Verweij, Bernhard Auchmann, J. Ph. Tock, Lucio Rossi, Michele Modena, and Andrzej Siemko

Subjects
Physics, Particle physics, Large Hadron Collider, Field (physics), 010308 nuclear & particles physics, Gaussian, Training (meteorology), Extrapolation, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, symbols.namesake, Magnet, 0103 physical sciences, Thermal, symbols, Electrical and Electronic Engineering, 010306 general physics
Abstract

During 2016, one-quarter of the LHC main dipoles have has been powered above the 7.7 T operational field, to reach a field of 8.1 T. These tests were done to confirm the extrapolation of the training behavior based on a Gaussian tail of the quench distribution. In this paper, it is shown that a modified Gaussian distribution can be used to better model the quench distributions. We then present the data above 6.5 TeV, showing that they are compatible with the previous expectations. We present the data of retraining of sector 12, which was warmed up in 2016 to replace a magnet, and training of individual magnets that went through several thermal cycles: there is an indication that training campaigns during successive warm-ups and cool-downs could become shorter. We finally show that a significant correlation is found between the training of the installed magnet and individual test after a thermal cycle (second cool-down). On the other hand, no correlation is found with individual test under virgin conditions (first cool-down).

Published
2018

48. Quench Protection Heater Study With the 2-m Model Magnet of Beam Separation Dipole for the HL-LHC Upgrade

Author

Toru Ogitsu, Ryutaro Okada, Hiroshi Kawamata, Kento Suzuki, Shun Enomoto, Andrea Musso, Tatsushi Nakamoto, Hirokatsu Ohata, Ezio Todesco, Norio Higashi, Nobuhiro Kimura, M. Iida, Naoki Okada, Michinaka Sugano, and Y. Ikemoto

Subjects
010302 applied physics, Materials science, Large Hadron Collider, Nuclear engineering, Magnetic separation, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Computer Science::Other, Electronic, Optical and Magnetic Materials, Upgrade, Nuclear magnetic resonance, Dipole magnet, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, Beam (structure), Electronic circuit
Abstract

The beam separation dipole magnet (D1), which is being operated in the large hadron collider (LHC), has to be replaced in accordance with upgrade to the high-luminosity LHC. The new D1 will be equipped with several circuits of heaters by which most of the stored energy is dissipated in the whole of the magnet during its quench, thereby avoiding localization of hot spots. Prior to construction of the production magnet, the 2-m mechanical short model is fabricated, and performance of this quench protection heater is evaluated through a series of the cold tests. As a result, we confirm that the maximum hot spot temperature obtained in the measurement reaches the practical limit of 300 K, and determine to design a new heater circuit. In this paper, we report the heater studies together with the prospect for future design of the quench protection heater.

Published
2018

49. Hi-Lumi LHC Twin Aperture Orbit Correctors 0.5-m Model Magnet Development and Cold Test

Author

J. Rysti, Per Espen Hagen, Matthias Mentink, Francois Olivier Pincot, Ezio Todesco, Nicolas Bourcey, Gijs de Rijk, J. Mazet, Jeroen van Nugteren, Glyn Kirby, Jaakko Samuel Murtomaki, Luca Gentini, Juan Carlos Perez, and Franco Mangiarotti

Subjects
010302 applied physics, Physics, Large Hadron Collider, Aperture, business.industry, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Optics, Electromagnetic coil, Magnet, 0103 physical sciences, Orbit (dynamics), Electrical and Electronic Engineering, 010306 general physics, business, Yoke, Beam (structure)
Abstract

The large hadron collider (LHC) upgrade, called high-luminosity LHC is planned for the next decade. A wide range of magnets and new technologies are currently under development. One of these systems will be a set of twin aperture beam orbit correctors positioned on the approaches to the ATLAS and CMS experiments. This twin aperture magnet system comprising 16 magnets, approximately 2 m long, with large 105-mm clear aperture coils. Each aperture will independently deliver 5-T⋅m integral field, between apertures the field vectors are rotated by 90° from each other, and individually powered. This paper presents the sequence of component developments to produce a cost-effective canted cosine theta model magnet. We describe the challenges encountered during the manufacture of the coil formers with their helical canted coil winding process which places a number of insulated wires into the 2-mm-wide 5-mm-deep slot. We describe the: pressurized impregnation process, multiple jointing to connect inner and outer sets of wires within the confines of the coil assembly, and magnet assembly into support structure and yoke. Finally, we present the quench performance and initial test results of this novel coil configuration.

Published
2018

50. Detailed Magnetic and Mechanical Design of the Nested Orbit Correctors for HL-LHC

Author

Pablo Gomez, Luis Garcia-Tabares, Nicolas Bourcey, Paolo Fessia, Susana Izquierdo Bermudez, Ezio Todesco, Javier Munilla, J. Calero, J.L. Gutierrez, D. López, Juan Carlos Perez, P. Abramian, Fernando Toral, and Jesus A. Garcia-Matos

Subjects
010302 applied physics, Large Hadron Collider, Computer science, Mechanical engineering, Superconducting magnet, Condensed Matter Physics, 01 natural sciences, Clamping, Electronic, Optical and Magnetic Materials, Dipole, Conceptual design, Magnet, 0103 physical sciences, Orbit (dynamics), Torque, Electrical and Electronic Engineering, 010306 general physics
Abstract

The high luminosity upgrade will enhance the discovery potential of the LHC in the next decade. Among other magnets and technologies currently under development, the MCBXF orbit correctors will be required to this end. In order to save space, they consist in two perpendicularly and coaxially arranged dipole coils under a large torque. Coils cannot be glued due to the high radiation dose expected, and mechanical clamping is mandatory. With the goal of turning the conceptual design into a tangible reality, this paper depicts the final magnetic design, with special attention to 3-D electromagnetic calculations and the different operation scenarios. It also includes more accurate mechanical FE models results, achieved by measuring the Young's modulus of impregnated cable stacks. Besides assembly spring-back, cool-down, and energization, simulations have been also carried out for the pressing process of both dipoles, analysing stress distribution, and displacements. Finally, a short mechanical model has been designed, fabricated, and tested. Its main purpose is to assess the feasibility of the proposed clamping structure, the reliability of the FE mechanical models and the design of an important part of the tooling required for the magnet fabrication.

Published
2018

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