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13 results on '"Mangiarotti, Franco J."'

1. Fabrication and Test of the Fourth Prototype of the D2 Orbit Corrector Dipole for HL-LHC

Author

Ilardi, Veronica, Felice, Helene, Feuvrier, Jerome, Fiscarelli, Lucio, Foussat, Arnaud P., Kirby, Glyn, Kosowski, Filip, Mangiarotti, Franco J., Pincot, Francois-Olivier, Rogacki, Piotr T., Todesco, Ezio, Tommasini, Davide, Urscheler, Cedric, and Willering, Gerard

Abstract

As part of the High-Luminosity upgrade project (HL-LHC) for the Large Hadron Collider (LHC) at CERN, new double-aperture beam orbit corrector magnets will be installed near the recombination dipole (D2). These magnets are 2.2 m long Nb–Ti dipoles based on the Canted Cosine-Theta (CCT) design. They provide an in bore magnetic field of 2.60 T at 394 A in a 105 mm aperture with an integrated field of 5 Tm. The fourth full-length prototype was built and tested at CERN. Its design is based on the best engineering practices from previous prototypes. In this paper we first report on recent improvements in the manufacturing process, focusing on the feedback from winding and on the optimization of the impregnation phase. The magnetic measurements carried out at warm and cold temperatures are then reported. Finally, the results of powering tests at 1.9 K and 4.5 K are presented. The magnet meets the dimensional, electrical and magnetic requirements, and is a valid reference for the HL-LHC series production that is currently being carried out in collaboration between CERN and Institute of High Energy Physics (IHEP).

Published
2024
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2. Curved-Canted-Cosine-Theta (CCCT) Dipole Prototype Development at CERN

Author

Haziot, Ariel, Kirby, Glyn, Dallocchio, Alessandro, Devred, Arnaud, Foussat, Arnaud, Gentini, Luca, Mangiarotti, Franco J., Pentella, Mariano, Petrone, Carlo, Pincot, Francois-Olivier, Rigaud, Jean-Sebastien, and Guardia-Valenzuela, Jorge

Abstract

Due to its flexibility in generating advanced field harmonic corrections and potential for low cost compared to traditional designs, the Canted Cosine Theta (CCT) configuration is particularly interesting for compact particle accelerators and gantries for medical applications. This article presents the design of a curved demonstrator named Fusillo, a Canted Cosine Theta Nb-Ti dipole magnet that is being developed at CERN, featuring a large aperture of 236 mm, a small bending radius of 1 m, a bending angle of 90$^{\circ }$, and multi-harmonic field correction, with a 3.61 T conductor peak field. We detail the magnetic coil design, incorporating high-order magnetic field correction of the errors produced by the heavily curved coil, peak field reduction at the coil ends, the development of a new rope type cable, and the mechanical design and the development of the former that supports the coil and provides the curved shape. We also present the first results of a subscale model used to qualify the coil's former manufacturing process, the rope cable, the coil winding optimization, and the coil impregnation system.

Published
2024
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3. Powering Performance and Endurance Beyond Design Limits of HL-LHC Low-Beta Quadrupole Model Magnets

Author

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

Published
2021
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4. Assessment of MQXF Quench Heater Insulation Strength and Test of Modified Design

Author

Baldini, Maria, primary, Ambrosio, Giorgio, additional, Anerella, Michael D., additional, Bermudez, Susana I., additional, Bossert, Rodger C., additional, Ferracin, Paolo, additional, Krave, Steven, additional, Mangiarotti, Franco J., additional, Marinozzi, Vittorio, additional, Nobrega, Alfred, additional, Orozco, Charles, additional, Schmalzle, Jesse, additional, Stoynev, Stoyan, additional, Todesco, Ezio, additional, and Yu, Miao, additional

Published
2021
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5. Test of the First Full-Length Prototype of the HL-LHC D2 Orbit Corrector Based on Canted Cosine Theta Technology

Author

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

Published
2020
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6. Power Tests of the First Nested Orbit Corrector Prototype for HL-LHC

Author

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

Published
2020
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7. Test of the First Full-Length Prototype of the HL-LHC D2 Orbit Corrector Based on Canted Cosine Theta Technology

Author

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

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

Author

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

Published
2019
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9. Test of Short Model and Prototype of the HL-LHC D2 Orbit Corrector Based on CCT Technology

Author

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

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
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11. Quench propagation in Nb$_{3}$Sn cos-theta 11 T dipole model magnets in high stress areas

Author

Mangiarotti, Franco J, Willering, Gerard P, Bajas, Hugues, Bajko, Marta, Bordini, Bernardo, Bottura, Luca, Izquierdo Bermudez, Susana, Löffler, Christian H, Gomez, Jose V Lorenzo, Savary, Frederic, and Probst, Matthias

Subjects
Quantitative Biology::Biomolecules, High Energy Physics::Lattice, Accelerators and Storage Rings
Abstract

A large number of training quenches at various currents, temperatures, and ramp rates, have been performed on six 11 T dipole model magnets. Quenches in the midplane of these magnets were of special interest, since the quench current in the last three models measured in 2016 was limited to between 84% and 92% of the magnets short sample limit. Measurements of quench propagation velocity, based on both voltage taps and quench antennas, yield a high propagation velocity of 50 to 80 m/s. Due to the high magnetic field gradient over the width of the midplane turn such a high propagation speed cannot be explained by propagation in longitudinal direction of the strand following the twist pitch. In these cases, current and heat sharing at the thin cable edge (where the field, stress, and cable compaction are high) are likely to provoke strand-to-strand quench propagation at higher velocities than along the strands. This investigation is focused on analyzing the quench propagation along the strands and strand-to-strand of various measured cases.

Published
2018

12. Quench Propagation in Nb $_\text{3}$ Sn Cos-Theta 11 T Dipole Model Magnets in High Stress Areas

Author

Mangiarotti, Franco J., primary, Willering, Gerard P., additional, Bajas, Hugues, additional, Bajko, Marta, additional, Bordini, Bernardo, additional, Bottura, Luca, additional, Bermudez, Susana Izquierdo, additional, Loffler, Christian H., additional, Gomez, Jose V. Lorenzo, additional, Savary, Frederic, additional, and Probst, Matthias, additional

Published
2018
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