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144 results on '"Hafalia, A. R."'

1. Test Results for a Superconducting 28-GHz Ion Source Magnet for FRIB

Author

Arbelaez, Diego, Pan, Heng, Myers, Scott, Hafalia, Aurelio R, Wang, Xiaorong, Turqueti, Marcos, Taylor, Jordan, Prestemon, Soren O, Felice, Helene, Rochepault, Etienne, Pozdeyev, Eduard, Machicoane, Guillaume, Omelayenko, Mykola, and Rao, Xing

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, ECR source, superconducting magnet, quench protection, training, Condensed Matter Physics, Electrical and Electronic Engineering, Materials Engineering, General Physics, Electrical engineering, Condensed matter physics
Abstract

The superconducting ECR source magnet for the Facility for Rare Isotope Beams at Michigan State University was designed and built by the Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL). The 28-GHz NbTi ion source magnet features a sextupole-in-solenoids configuration, which is comparable to the VENUS ECR magnet operated at LBNL. A shell-based support structure using bladders and keys has been incorporated into the design to allow for adjustments of the preload and reversibility of the magnet assembly process. The magnet has been assembled and successfully tested to operational currents at LBNL. This paper describes the basic design of the magnet and the passive quench protection system. The test results are also presented, including the quench behavior of the magnet, the training performance, and the magnetic measurement results.

Published
2019

2. Mechanical Study of a Superconducting 28-GHz Ion Source Magnet for FRIB

Author

Pan, Heng, Arbelaez, Diego, Felice, Helene, Hafalia, Aurelio R, Lipton, Thomas, Myers, Scott, Machicoane, Guillaume, Omelayenko, Mykola, Prestemon, Soren, Pozdeyev, Eduard, Rochepault, Etienne, and Rao, Xing

Subjects
Synchrotrons and Accelerators, Physical Sciences, Mechanical, ECR superconducting magnet, strain, sextupole, Condensed Matter Physics, Electrical and Electronic Engineering, Materials Engineering, General Physics, Electrical engineering, Condensed matter physics
Abstract

The superconducting electron cyclotron resonance (ECR) source magnet for the facility for rare isotope beams at Michigan State University was designed and built by the Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL) in 2017. The 28 GHz NbTi ion source magnet features a sextupole-in-solenoids configuration which is comparable to the VENUS ECR magnet operated at LBNL. However, the mechanical design of this magnet utilizes a shell-based support structure which allows fine adjustments to the sextupole preload and reversibility of the magnet assembly process. The magnet has been assembled and tested to operational currents at LBNL. This paper describes the mechanical analyses performed to estimate the sextupole's and solenoids' preloads. We will report on the 3-D finite element analysis during room temperature assembly, cool-down, and magnet excitation, and then describe the magnet preload operations. Finally, we will describe the performance of the support structure during the quench training.

Published
2019

3. Axial-Field Magnetic Quench Antenna for the Superconducting Accelerator Magnets

Author

Marchevsky, Maxim, Hafalia, Aurelio R, Cheng, Daniel, Prestemon, Soren, Sabbi, Gianluca, Bajas, Hugo, and Chlachidze, Guram

Subjects
Magnetic probes, superconducting accelerator magnets, Condensed Matter Physics, Electrical and Electronic Engineering, Materials Engineering, General Physics
Abstract

We have developed and tested a novel magnetic inductive antenna for detecting and localizing quenches and flux jumps in superconducting accelerator magnets during ramping and steady-state operations. The antenna principle is based upon sensing temporal variation of the axial field gradient in the magnet bore that is specific to propagating quench. Two antenna configurations were developed and built, optimized respectively for sensing disturbances of the off-axis (for the dipole magnet) and axial (for the quadrupole magnet) gradient of the axial field. The antennas were qualified during tests of LBNL's high-field dipole, HD3b, and LARP's Nb3Sn quadrupole HQ02b. A reliable and accurate localization of quenches and flux jumps was demonstrated. Upon ramping up the magnet current, we observed peculiar dynamics of the magnetic disturbances travelling along the cable at velocities of ∼800 m/s. Also, details of slow quench propagation in the HQ02 quadrupole at a small fraction of operational current were detected and recorded.

Published
2015

4. Test Results of a Nb3Sn Wind/React "Stress-Managed" Block Dipole

Author

McInturff, A., Bish, P., Blackburn, R., Diaczenko, N., Elliott, T., Hafalia Jr., R., Henchel, W., Jaisle, A., Lau, W., Lietzke, A., McIntyre, P., Noyes, P., Nyman, M., and Sattarov, A.

Subjects
Particle accelerators, Particle accelerators, Particle accelerators, superconducting accelerator magnets Nb3Sn stress controlwind/react
Abstract

A second phase of a high field dipole technology development has been tested. A Nb3Sn block-coil model dipole was fabricated, using magnetic mirror geometry and wind/react coil technology. The primary objective of this phase was to make a first experimental test of the stress-management strategy pioneered at Texas A&M. In this strategy a high-strength support matrix is integrated with the windings to intercept Lorentz stress from the inner winding so that it does not accumulate in the outer winding. The magnet attained a field that was consistent with short sample limit on the first quench; there was no training. The decoupling of Lorentz stress between inner and outer windings was validated. In ramp rate studies the magnet exhibited a remarkable robustness in rapid ramping operation. It reached 85 percent of short sample(ss) current even while ramping 2-3 T/s. This robustness is attributed to the orientation of the Rutherford cables parallel to the field in the windings, instead of the transverse orientation that characterizes common dipole designs. Test results are presented and the next development phase plans are discussed.

Published
2006

5. Development of a large aperture Nb3Sn racetrack quadrupole magnet

Author

Ferracin, Paolo, Bartlett, Scott E., Caspi, Shlomo, Dietderich, Daniel R., Gourlay, Steven A., Hannaford, Charles R., Hafalia, Aurelio R., Lietzke, Alan F., Mattafirri, Sara, McInturff, Alfred D., Nyman, Mark, and Sabbi, Gianluca

Subjects
Particle accelerators
Published
2005

6. Mechanical analysis of the Nb3Sn dipole magnet HD1

Author

Ferracin, Paolo, Bartlett, Scott E., Caspi, Shlomo, Dietderich, Daniel R., Gourlay, Steve A., Hannaford, Carles R., Hafalia, Aurelio R., Lietzke, Alan F., Mattafirri, Sara, and Sabbi, Gianluca

Subjects
Particle accelerators
Published
2005

7. Design and test of a [Nb.sub.3]Sn subscale dipole magnet for training studies

Author

Felice, Helene, Caspi, Shloma, Dietderich, Daniel R., Ferracin, Paolo, Gourlay, Steve A., Hafalia, Aurelio R., Lietzke, Alan F., Mailfert, Alain, Sabbi, GianLuca, and Vedrine, Pierre

Subjects
Superconducting magnets -- Usage, Niobium -- Electric properties, Niobium -- Magnetic properties, Magnetic fields -- Measurement, Business, Electronics, Electronics and electrical industries
Abstract

The design and fabrication of a [Nb.sub.3]Sn subscale dipole magnet (SD01) is presented. Findings reveal that the magnet has a first quench at 98 percent of the expected short sample and 96 percent of the maximum current reached.

Published
2007

8. Summary of Test Results of MQXFS1—The First Short Model 150 mm Aperture Nb3Sn Quadrupole for the High-Luminosity LHC Upgrade

Author

Stoynev, Stoyan, primary, Ambrosio, Giorgio, additional, Anerella, Michael, additional, Bossert, Rodger, additional, Cavanna, Eugenio, additional, Cheng, Daniel, additional, Dietderich, Daniel, additional, DiMarco, Joseph, additional, Felice, Helene, additional, Ferracin, Paolo, additional, Chlachidze, Guram, additional, Ghosh, Arup, additional, Grosclaude, Philippe, additional, Guinchard, Michael, additional, Hafalia, A. R., additional, Holik, Eddie Frank, additional, Bermudez, Susana Izquierdo, additional, Krave, Steven, additional, Marchevsky, Maxim, additional, Nobrega, Alfred, additional, Orris, Darryl, additional, Pan, Heng, additional, Perez, Juan Carlos, additional, Prestemon, Soren, additional, Ravaioli, Emmanuele, additional, Sabbi, GianLuca, additional, Salmi, Tiina, additional, Schmalzle, Jesse, additional, Strauss, Thomas, additional, Sylvester, Cosmore, additional, Tartaglia, Michael, additional, Todesco, Ezio, additional, Vallone, Giorgio, additional, Velev, Gueorgui, additional, Wanderer, Peter, additional, Wang, Xiaorong, additional, and Yu, Miao, additional

Published
2018
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9. Performance of the First Short Model 150-mm-Aperture Nb3Sn Quadrupole MQXFS for the High-Luminosity LHC Upgrade

Author

Chlachidze, Guram, primary, Ambrosio, Giorgio, additional, Anerella, Michael, additional, Bossert, Rodger, additional, Cavanna, Eugenio, additional, Cheng, Daniel W., additional, Dietderich, Daniel R., additional, DiMarco, Joseph, additional, Felice, Helene, additional, Ferracin, Paolo, additional, Ghosh, Arup K., additional, Grosclaude, Philippe, additional, Guinchard, Michael, additional, Hafalia, A. R., additional, Holik, Eddie Frank, additional, Bermudez, Susana Izquierdo, additional, Krave, Steven T., additional, Marchevsky, Maxim, additional, Nobrega, Alfred, additional, Orris, Darryl, additional, Pan, Heng, additional, Perez, Juan Carlos, additional, Prestemon, Soren, additional, Ravaioli, Emmanuele, additional, Sabbi, GianLuca, additional, Salmi, Tiina, additional, Schmalzle, Jesse, additional, Stoynev, Stoyan Emilove, additional, Strauss, Thomas, additional, Sylvester, Cosmore, additional, Tartaglia, Michael, additional, Todesco, Ezio, additional, Vallone, Giorgio, additional, Velev, Gueorgui, additional, Wanderer, Peter, additional, Wang, Xiaorong, additional, and Yu, Miao, additional

Published
2017
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10. Performance of HQ02, an optimized version of the 120 mm $Nb_3Sn$ LARP quadrupole

Author

Chlachidze, G, Ambrosio, G, Anerella, M, Borgnolutti, F, Bossert, R, Caspi, S, Cheng, D W, Dietderich, D, Felice, H, Ferracin, P, Ghosh, A, Godeke, A, Hafalia A R, Marchevsky, M, Orris, D, Roy, P K, Sabbi, G L, Salmi, T, Schmalzle, J, Sylvester, C, Tartaglia, M, Tompkins, J, Wanderer, P, Wang, X R, and Zlobin, A V

Subjects
Physics::Accelerator Physics, Accelerators and Storage Rings
Abstract

In preparation for the high luminosity upgrade of the Large Hadron Collider (LHC), the LHC Accelerator Research Program (LARP) is developing a new generation of large aperture high-field quadrupoles based on Nb$_{3}$Sn technology. One meter long and 120 mm diameter HQ quadrupoles are currently produced as a step toward the eventual aperture of 150 mm. Tests of the first series of HQ coils revealed the necessity for further optimization of the coil design and fabrication process. A new model (HQ02) has been fabricated with several design modifications, including a reduction of the cable size and an improved insulation scheme. Coils in this magnet are made of a cored cable using 0.778 mm diameter Nb$_{3}$Sn strands of RRP 108/127 sub-element design. The HQ02 magnet has been fabricated at LBNL and BNL, and then tested at Fermilab. This paper summarizes the performance of HQ02 at 4.5 K and 1.9 K temperatures. In preparation for the high luminosity upgrade of the Large Hadron Collider (LHC), the LHC Accelerator Research Program (LARP) is developing a new generation of large aperture high-field quadrupoles based on Nb_3Sn technology. One meter long and 120 mm diameter HQ quadrupoles are currently produced as a step toward the eventual aperture of 150 mm. Tests of the first series of HQ coils revealed the necessity for further optimization of the coil design and fabrication process. A new model (HQ02) has been fabricated with several design modifications, including a reduction of the cable size and an improved insulation scheme. Coils in this magnet are made of a cored cable using 0.778 mm diameter Nb_3Sn strands of RRP 108/127 subelement design. The HQ02 magnet has been fabricated at LBNL and BNL, and then tested at Fermilab. This paper summarizes the performance of HQ02 at 4.5 K and 1.9 K temperatures.

Published
2014

11. Test of Optimized 120-mm LARP $Nb_{3}S_n$ Quadrupole Coil Using Magnetic Mirror Structure

Author

Chlachidze, G, Ambrosio, G, Andreev, N, Anerella, M, Barzi, E, Bossert, R, Caspi, S, Cheng, D, Dietderich, D, Felice, H, Ferracin, P, Ghosh, A, Godeke, A, Hafalia, A R, Kashikhin, V V, Lamm, M, Marchevsky, M, Nobrega, A, Novitski, I, Orris, D, Sabbi, G L, Schmalzle, J, Wanderer, P, and Zlobin, A V

Subjects
Quantitative Biology::Biomolecules, Accelerators and Storage Rings
Abstract

The US LHC accelerator research program (LARP) is developing a new generation of large - aperture high - field quadrupoles based on Nb 3 Sn conductor for the High luminosity upgrade of Large Hadron Collider (HiLumi - LHC). Tests of the first series of 120 - mm aperture HQ coils revealed the necessity for further optimization of the coil design and fabrication process. Modifications in coil design were gradually implemented in two HQ coils previously tested at Fermi National Accelerato r Laboratory (Fermilab) using a magnetic mirror structure (HQM01 and HQM02). This paper describes the construction and test of an HQ mirror model with a coil of optimized design and with an interlayer resistive core in the conductor. The cable for this co il was made of a smaller diameter strand, providing more room for coil expansion during reaction. The 0.8 - mm strand, used in all previous HQ coils was replaced with a 0.778 - mm Nb 3 Sn strand of RRP 108/127 sub - element design. The coil was instrumented with voltage taps, heaters, and strain gauges to monitor mechanical and thermal properties and quench performance of the coil.

Published
2013

12. Progress in the long $Nb_3Sn$ quadrupole R&D by LARP

Author

Ambrosio, G, Andreev, N, Anerella, M, Barzi, E, Bocian, D, Bossert, r, Buehler, M, Caspi, S, Chlachidze, G, Dietderich, D, DiMarco, J, Escallier, J, Felice, H, Ferracin, P, Ghosh, A, Godeke, A, Hafalia, A R, Hannaford, R, Jochen, G, Kim, M J, Kovach, P, Lamm, M, Marchevsky, M, McInturff, A, Nobrega, A, Orris, D, Prebys, E, Prestemon, G I, Sabbi, G L, Schmalzle, J, Sylvester, C, Tartaglia, M, Turroni, D, Velev, G, Wanderer, P, Whitson, G, and Zlobin, A V

Subjects
Accelerators and Storage Rings
Abstract

After the successful test of the first long quadrupole (LQS01) the US LHC Accelerator Research Program (LARP, a collaboration of BNL, FNAL, LBNL and SLAC) is assessing training memory, reproducibility, and other accelerator quality features of long quadrupole magnets. LQS01b (a reassembly of LQS01 with more uniform and higher pre-stress) was subjected to a full thermal cycle and reached the previous plateau of 222 T/m at 4.5 K in two quenches. A new set of four coils, made of the same type of conductor used in LQS01 (RRP 54/61 by Oxford Superconducting Technology), was assembled in the LQS01 structure and tested at 4.5 K and lower temperatures. The new magnet (LQS02) reached the target gradient (200 T/m) only at 2.6 K and lower temperatures, at inter- mediate ramp rates. The preliminary test analysis, here reported, showed a higher instability in the limiting coil than in the other coils of LQS01 and LQS02.

Published
2012

13. Test Results of the LARP HQ02b Magnet at 1.9 K

Author

Bajas, H., primary, Ambrosio, G., additional, Anerella, M., additional, Bajko, M., additional, Bossert, R., additional, Bottura, L., additional, Caspi, S., additional, Cheng, D., additional, Chiuchiolo, A., additional, Chlachidze, G., additional, Dietderich, D., additional, Felice, H., additional, Ferracin, P., additional, Feuvrier, J., additional, Ghosh, A., additional, Giloux, C., additional, Godeke, A., additional, Hafalia, A. R., additional, Marchevsky, M., additional, Ravaioli, E., additional, Sabbi, G. L., additional, Salmi, T., additional, Schmalzle, J., additional, Todesco, E., additional, Wanderer, P., additional, Wang, X., additional, and Yu, M., additional

Published
2015
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14. Fabrication of a Third Generation of$\hbox{Nb}_{3}\hbox{Sn}$ Coils for the LARP HQ03 Quadrupole Magnet

Author

Borgnolutti, F., primary, Ambrosio, G., additional, Bossert, R., additional, Chlachidze, G., additional, Cheng, D. W., additional, Dietderich, D. R., additional, Felice, H., additional, Godeke, A., additional, Hafalia, A. R., additional, Marchevsky, M., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P., additional, and Yu, M., additional

Published
2015
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16. Development of TQC01, a 90-mm Nb$_3$Sn model quadrupole for LHC upgrade based on SS collar

Author

Bossert, R C, Ambrosio, G, Andreev, N, Barzi, E, Caspi, S, Dietderich, D R, Ferracin, P, Ghosh, A, Gourlay, S A, Hafalia, A R, Hannaford, C R, Kashikhin, V S, Kashikhin, V V, Lietzke, A F, Mattafirri, S, McInturff, A D, Novitsky, I, Sabbi, G L, Turrioni, D, Whitson, G, Yamada, R, and Zlobin, A V

Subjects
Physics::Instrumentation and Detectors, Physics::Accelerator Physics, High Energy Physics::Experiment, Accelerators and Storage Rings
Abstract

As a first step toward the development of a large-aperture Nb$_3$Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer technological quadrupole models (TQS01 at LBNL and TQC01 at Fermilab) are being constructed within the framework of the US LHC Accelerator Research Program (LARP). Both models use the same coil design, but have different coil support structures. This paper describes the TQC01 design, fabrication technology and summarizes its main parameters.

Published
2006

17. Measured Strain in $rm Nb_3rm Sn$ Coils During Excitation and Quench

Author

Caspi, S., Bartlett, S. E., Dietderich, D. R., Ferracin, P., Gourlay, S. A., Hannaford, C. R., Hafalia, A. R., Lietzke, A. F., Mattafirri, S., Nyman, M., and Sabbi, G.

Abstract

The strain in a high field Nb3Sn coil was measured during magnet assembly, cool-down, excitation and spot heater quenches. Strain was measured with a full bridge strain gauge mounted directly over the turns and impregnated with the coil. Two such coils were placed in a "common coil" fashion capable of reaching 11 T at 4.2 K. The measured steady state strain in the coil is compared with results obtained using the FEM code ANSYS. During quenches, the transient strain (due to temperature rise) was also measured and compared with the calculated mechanical time response to a quench.

Published
2005

18. Design of HD2: A 14-Tesla Nb$_3$Sn dipole with a 35-mm bore

Author

Bartlett, S E, Caspi, S, Dietderich, D R, Ferracin, P, Gourlay, S A, Hafalia, A R, Hannaford, C R, Lietzke, A F, Mattafirri, S, McInturff, A D, and Sabbi, G L

Subjects
Accelerators and Storage Rings
Abstract

The Nb$_3$Sn dipole HD1, recently fabricated and tested at LBNL, pushes the limits of accelerator magnet technology into the 16 T field range, and opens the way to a new generation of HEP colliders. HD1 is based on a flat racetrack coil configuration and has a 10 mm bore. These features are consistent with the HD1 goals: exploring the Nb/sub 3/Sn conductor performance limits at the maximum fields and under high stress. However, in order to further develop the block-coil geometry for future high-field accelerators, the bore size has to be increased to 30-50 mm. With respect to HD1, the main R&D; challenges are: (a) design of the coil ends, to allow a magnetically efficient cross-section without obstructing the beam path; (b) design of the bore, to support the coil against the pre-load force; (c) correction of the geometric field errors. HD2 represents a first step in addressing these issues, with a central dipole field above 15 T, a 35 mm bore, and nominal field harmonics within a fraction of one unit. This paper describes the HD2 magnet design concept and its main features, as well as further steps required to develop a cost-effective block-coil design for future high-field, accelerator-quality dipoles.

Published
2005

19. Fabrication and performance of Nb$_{3}$Sn Rutherford-type cable with Cu added as a separate component

Author

Coccoli, M, Scanlan, R M, Calvi, M, Caspi, S, Chiesa, L, Hafalia, R R, Higley, H C, Dietderich, D R, Gourlay, S A, Lietzke, A F, McInturff, A D, and Sabbi, G L

Subjects
Quantitative Biology::Biomolecules, Quantitative Biology::Neurons and Cognition, Accelerators and Storage Rings
Abstract

From the standpoint of overall conductor cost, it is desirable to minimize the amount of Cu that is co-processed with the superconductor during strand fabrication. We are investigating several approaches for fabricating multistrand cables in which the Cu is added at the final, i.e. cabling, stage of manufacture. These include mixed strand Rutherford-type cables with pure Cu strands cabled together with superconductor strands that have a low volume fraction of Cu, Cu added as a core to a Rutherford-type cable, and Cu strip added to the surface of the cable. Results on fabrication of several alternate types of Nb$_{3}$Sn cables are presented. The more promising types of mixed strand and cored cables are being evaluated in short sample and small magnet tests. These results will be presented and the performance will be compared with conventional Rutherford cables where the Cu is an integral component of the superconductor strand.

Published
2004

20. Test of the High-Field $\hbox{Nb}_{3}\hbox{Sn}$ Dipole Magnet HD3b

Author

Marchevsky, M., primary, Joseph, J., additional, Lizarazo, J., additional, Roy, P. K., additional, Sabbi, G., additional, Salmi, T., additional, Turqueti, M., additional, Wang, X., additional, Prestemon, S., additional, Caspi, S., additional, Cheng, D. W., additional, Dietderich, D. R., additional, DiMarco, J., additional, Felice, H., additional, Ferracin, P., additional, Godeke, A., additional, and Hafalia, A. R., additional

Published
2014
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21. Performance of HQ02, an Optimized Version of the 120 mm$\hbox{Nb}_{3}\hbox{Sn}$ LARP Quadrupole

Author

Chlachidze, G., primary, Ambrosio, G., additional, Anerella, M., additional, Borgnolutti, F., additional, Bossert, R., additional, Caspi, S., additional, Cheng, D. W., additional, Dietderich, D., additional, Felice, H., additional, Ferracin, P., additional, Ghosh, A., additional, Godeke, A., additional, Hafalia, A. R., additional, Marchevsky, M., additional, Orris, D., additional, Roy, P. K., additional, Sabbi, G. L., additional, Salmi, T., additional, Schmalzle, J., additional, Sylvester, C., additional, Tartaglia, M., additional, Tompkins, J., additional, Wanderer, P., additional, Wang, X. R., additional, and Zlobin, A. V., additional

Published
2014
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22. Fabrication of a Second-Generation of $\hbox{Nb}_{3} \hbox{Sn}$ Coils for the LARP HQ02 Quadrupole Magnet

Author

Borgnolutti, F., primary, Ambrosio, G., additional, Bossert, R., additional, Chlachidze, G., additional, Cheng, D. W., additional, Dietderich, D. R., additional, Felice, H., additional, Godeke, A., additional, Hafalia, A. R., additional, Marchevsky, M., additional, Roy, P. K., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P., additional, and Yu, M., additional

Published
2014
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24. Cold Test Results of the LARP HQ $\hbox{Nb}_{3} \hbox{Sn}$ Quadrupole Magnet at 1.9 K

Author

Bajas, H., primary, Ambrosio, G., additional, Anerella, M., additional, Bajko, M., additional, Bossert, R., additional, Caspi, S., additional, Chiuchiolo, A., additional, Chlachidze, G., additional, Dietderich, D., additional, Dunkel, O., additional, Felice, H., additional, Ferracin, P., additional, Feuvrier, J., additional, Fiscarelli, L., additional, Ghosh, A., additional, Giloux, C., additional, Godeke, A., additional, Hafalia, A. R., additional, Marchevsky, M., additional, Russenschuck, S., additional, Sabbi, G. L., additional, Salmi, T., additional, Schmalzle, J., additional, Todesco, E., additional, Wanderer, P., additional, Wang, X., additional, and Yu, M., additional

Published
2013
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25. Test of Optimized 120-mm LARP $\hbox{Nb}_{3}\hbox{Sn}$ Quadrupole Coil Using Magnetic Mirror Structure

Author

Chlachidze, G., primary, Ambrosio, G., additional, Andreev, N., additional, Anerella, M., additional, Barzi, E., additional, Bossert, R., additional, Caspi, S., additional, Cheng, D., additional, Dietderich, D., additional, Felice, H., additional, Ferracin, P., additional, Ghosh, A., additional, Godeke, A., additional, Hafalia, A. R., additional, Kashikhin, V. V., additional, Lamm, M., additional, Marchevsky, M., additional, Nobrega, A., additional, Novitski, I., additional, Orris, D., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P., additional, and Zlobin, A. V., additional

Published
2013
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26. Challenges in the Support Structure Design and Assembly of HD3, a $\hbox{Nb}_{3}\hbox{Sn}$ Block-Type Dipole Magnet

Author

Felice, H., primary, Borgnolutti, F., additional, Caspi, S., additional, Cheng, D. W., additional, Dietderich, D. R., additional, Ferracin, P., additional, Godeke, A., additional, Hafalia, A. R., additional, Joseph, J. M., additional, Lizarazo, J., additional, Marchevsky, M., additional, Prestemon, S., additional, Sabbi, G., additional, and Wang, X. R., additional

Published
2013
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30. Quench Performance of HQ01, a 120 mm Bore LARP Quadrupole for the LHC Upgrade

Author

Marchevsky, M., primary, Ambrosio, G., additional, Bingham, B., additional, Bossert, R., additional, Caspi, S., additional, Cheng, D. W., additional, Chlachidze, G., additional, Dietderich, D., additional, DiMarco, J., additional, Felice, H., additional, Ferracin, P., additional, Ghosh, A., additional, Hafalia, A. R., additional, Joseph, J., additional, Lizarazo, J., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P., additional, Wang, X., additional, and Zlobin, A. V., additional

Published
2012
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31. Optimization and Test of 120 mm LARP Nb$_{3}$Sn Quadrupole Coils Using Magnetic Mirror Structure

Author

Bossert, R., primary, Ambrosio, G., additional, Andreev, N., additional, Anerella, M., additional, Barzi, E., additional, Caspi, S., additional, Cheng, D., additional, Chlachidze, G., additional, Dietderich, D., additional, Felice, H., additional, Ferracin, P., additional, Ghosh, A., additional, Hafalia, A. R., additional, Kashikhin, V. V., additional, Lamm, M., additional, Nobrega, A., additional, Novitski, I., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P., additional, and Zlobin, A. V., additional

Published
2012
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32. Impact of Coil Compaction on ${\hbox {Nb}}_{3}{\hbox {Sn}}$ LARP HQ Magnet

Author

Felice, H., primary, Ambrosio, G., additional, Anerella, M. D., additional, Bocian, D., additional, Bossert, R., additional, Caspi, S., additional, Collins, B., additional, Cheng, D., additional, Chlachidze, G., additional, Dietderich, D. R., additional, Ferracin, P., additional, Godeke, A., additional, Ghosh, A., additional, Hafalia, A. R., additional, Joseph, J. M., additional, Krishnan, J., additional, Marchevsky, M., additional, Sabbi, G., additional, Schmalzle, J., additional, Wanderer, P., additional, Wang, X. R., additional, and Zlobin, A., additional

Published
2012
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33. Mechanical Behavior of HQ01, a ${\hbox{Nb}}_{3}\hbox{Sn}$ Accelerator-Quality Quadrupole Magnet for the LHC Luminosity Upgrade

Author

Ferracin, P., primary, Ambrosio, G., additional, Anerella, M., additional, Bossert, R., additional, Caspi, S., additional, Chlachidze, G., additional, Cheng, D. W., additional, Dietderich, D. R., additional, Felice, H., additional, Ghosh, A., additional, Hafalia, A. R., additional, Lizarazo, J., additional, Marchevsky, M., additional, Joseph, J., additional, Sabbi, G., additional, Schmalzle, J., additional, Wanderer, P., additional, Wang, X., additional, and Zlobin, A. V., additional

Published
2012
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34. Mechanical Performance of the LARP Nb$_{3}$Sn Quadrupole Magnet LQS01

Author

Ferracin, P., primary, Ambrosio, G., additional, Anerella, M., additional, Bingham, B., additional, Bossert, R., additional, Caspi, S., additional, Cheng, D. W., additional, Chlachidze, G., additional, Felice, H., additional, Hafalia, A. R., additional, Mumper, W., additional, Nobrega, F., additional, Prestemon, S., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Sylvester, C., additional, Tartaglia, M., additional, Wanderer, P., additional, and Zlobin, A. V., additional

Published
2011
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35. Test Results of 15 T ${\rm Nb}_{3}{\rm Sn}$ Quadrupole Magnet HQ01 with a 120 mm Bore for the LHC Luminosity Upgrade

Author

Caspi, S., primary, Ambrosio, G., additional, Anerella, M., additional, Barzi, E., additional, Bingham, B., additional, Bossert, R., additional, Cheng, D. W., additional, Chlachidze, G., additional, Dietderich, D. R., additional, Felice, H., additional, Ferracin, P., additional, Ghosh, A., additional, Hafalia, A. R., additional, Hannaford, C. R., additional, Joseph, J., additional, Kashikhin, V. V., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P., additional, Xiaorong, W., additional, and Zlobin, A. V., additional

Published
2011
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37. Assembly and Loading of LQS01, a Shell-Based 3.7 m Long ${\rm Nb}_{3}{\rm Sn}$ Quadrupole Magnet for LARP

Author

Ferracin, P, primary, Ambrosio, G, additional, Anerella, M, additional, Bingham, B, additional, Bossert, R, additional, Caspi, S, additional, Cheng, D W, additional, Chlachidze, G, additional, Felice, H, additional, Hafalia, A R, additional, Hannaford, C R, additional, Mumper, W, additional, Nobrega, F, additional, Prestemon, S, additional, Sabbi, G L, additional, Schmalzle, J, additional, Sylvester, C, additional, Tartaglia, M, additional, Wanderer, P, additional, and Zlobin, A V, additional

Published
2010
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38. Design and Fabrication of a Supporting Structure for 3.6 m Long Nb$_{3}$Sn Racetrack Coils

Author

Ferracin, P., primary, Ambrosio, G., additional, Anerella, M., additional, Barzi, E., additional, Caspi, S., additional, Cheng, D. W., additional, Dietderich, D. R., additional, Gourlay, S. A., additional, Hafalia, A. R., additional, Hannaford, C. R., additional, Lietzke, A. F., additional, Nobrega, A. R., additional, Sabbi, G. L., additional, Schmalzle, J., additional, Wanderer, P. J., additional, and Zlobin, A. V., additional

Published
2007
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39. Assembly and Tests of SQ02, a Nb$_{3}$Sn Racetrack Quadrupole Magnet for LARP

Author

Ferracin, P., primary, Ambrosio, G., additional, Barzi, E., additional, Caspi, S., additional, Dietderich, D. R., additional, Feher, S., additional, Gourlay, S. A., additional, Hafalia, A. R., additional, Hannaford, C. R., additional, Lizarazo, J., additional, Lietzke, A. F., additional, McInturff, A. D., additional, Sabbi, G. L., additional, and Zlobin, A. V., additional

Published
2007
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41. Fabrication and Test of TQS01—A 90 mm ${\rm Nb}_{3}{\rm Sn}$ Quadrupole Magnet for LARP

Author

Caspi, S., primary, Dietderich, D., additional, Ferracin, P., additional, Gourlay, S. A., additional, Hafalia, A. R., additional, Hannaford, R., additional, Lietzke, A. F., additional, McInturff, A. D., additional, Sabbi, G. L., additional, Ghosh, A., additional, Andreev, A. N., additional, Barzi, E., additional, Bossert, R., additional, Kashikhin, V. V., additional, Novitski, I., additional, Whitson, G., additional, and Zlobin, A. V., additional

Published
2007
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43. Test of the High-Field \Nb3\Sn Dipole Magnet HD3b.

Author

Marchevsky, M., Caspi, S., Cheng, D. W., Dietderich, D. R., DiMarco, J., Felice, H., Ferracin, P., Godeke, A., Hafalia, A. R., Joseph, J., Lizarazo, J., Roy, P. K., Sabbi, G., Salmi, T., Turqueti, M., Wang, X., and Prestemon, S.

Subjects
MAGNETIC dipoles, MAGNETS, ELECTRIC insulators & insulation, THERMOCYCLING, ACOUSTIC emission
Abstract

We report test results for the one meter long dipole HD3b, a block-type accelerator quality \Nb3\Sn magnet built at LBNL with operational bore fields in the range of 13–15 T. The magnet is an upgrade of the previously reported HD2 and HD3a versions, with several modifications implemented to improve conductor positioning, reduce cable “hard-way” bending radius, and strengthen electrical insulation between cables and coil parts. The magnet exhibited long training behavior, but showed a good “memory” of the trained state upon thermal cycling. Ramp-rate dependence of the quench current, field quality performance characteristics, and protection heater studies were conducted. Quench propagation velocity and quench locations were determined based on the voltage signals; quench localization was further improved using inductive quench antenna and acoustic emission sensors. Short- and long-term acoustic precursors to quenching were observed. [ABSTRACT FROM PUBLISHER]

Published
2014
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44. Fabrication of a Second-Generation of \Nb3 \Sn Coils for the LARP HQ02 Quadrupole Magnet.

Author

Borgnolutti, F., Ambrosio, G., Bossert, R., Chlachidze, G., Cheng, D. W., Dietderich, D. R., Felice, H., Godeke, A., Hafalia, A. R., Marchevsky, M., Roy, P. K., Sabbi, G. L., Schmalzle, J., Wanderer, P., and Yu, M.

Subjects
LUMINOSITY, MAGNETS, SUPERCONDUCTING magnets, MAGNETISM, BIOMAGNETISM
Abstract

In the framework of the Large Hadron Collider Luminosity upgrade (HiLumi-LHC) project, the US LHC accelerator research program is developing high-gradient, large-aperture \Nb3 \Sn quadrupole magnets for the LHC interaction regions. The fabrication and tests of a first series of 120-mm-aperture “HQ01” coils revealed design issues that resulted in limited performance. A second series of coils was fabricated in which a number of improved features were implemented (HQ02 coils). The improvements were partly validated with the successful test of an HQ02 coil in a mirror structure, which reached 97% of the short sample. Here, we review the modifications in the coil design and the coil fabrication process, report the issues met during the fabrication, give details of the few differences that exist within the set of HQ02 coils, and discuss a list of further improvements that will be implemented in a third series of HQ coils. [ABSTRACT FROM PUBLISHER]

Published
2014
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45. Impact of Coil Compaction on \ Nb3{\ {Sn}} LARP HQ Magnet.

Author

Felice, H., Ambrosio, G., Anerella, M. D., Bocian, D., Bossert, R., Caspi, S., Collins, B., Cheng, D., Chlachidze, G., Dietderich, D. R., Ferracin, P., Godeke, A., Ghosh, A., Hafalia, A. R., Joseph, J. M., Krishnan, J., Marchevsky, M., Sabbi, G., Schmalzle, J., and Wanderer, P.

Subjects
ELECTRIC coils, LARGE Hadron Collider, RESEARCH & development, LUMINOSITY, ALUMINUM alloys
Abstract

In the past two years the US LARP program carried out five tests on a quadrupole magnet aimed at the high luminosity upgrade of Large Hadron Collider (HiLumi-LHC). The 1-meter long, 120 mm bore \ Nb3{\ {Sn}} IR quadrupole magnet (HQ) with a short sample gradient of 219 T/m at 1.9 K and a conductor peak field of 15 T is part of the US LHC Accelerator Research Program (LARP). In a series of tests, carried out at 4.4 K, the magnet reached a maximum “short-sample” performance of 86%. The tests exposed several shortcomings that are now being addressed in a Research & Development program. This paper summarizes the magnet test results, reveals findings, R&D actions and future improvements. [ABSTRACT FROM PUBLISHER]

Published
2012
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46. Design of LD1, a Large-Aperture High-Field Nb3Sn Dipole Magnet.

Author

Ferracin, P., Cheng, D. W., Dietderich, D. R., Felice, H., Godeke, A., Hafalia, A. R., Marchevsky, M., Sabbi, G., and Wang, X.

Subjects
MAGNETIC dipoles, ACCELERATOR magnets, SUPERCONDUCTING magnets, HIGH temperature superconductors, HOMOGENEITY
Abstract

In order to continue supporting the development of accelerator magnets for the next generation of particle colliders, the LBNL Superconducting Magnet Program has started the design and fabrication of the Nb3Sn Large-aperture Dipole LD1. The goal of the magnet is to generate a dipole field of 13 T to 15 T in a clear aperture of 144 mm \times 94 mm, enabling high-field tests of Rutherford cables and insert coils made of Nb3Sn or high temperature superconductors (HTS), like Bi-2212, YBCO, and Bi-2223. The bore size will also accommodate large Cable-In-Conduit Conductors (CICC's), including ITER cables. We describe in this paper the design of LD1, in particular cable geometry, coil lay-out and support structure. Operational conditions based on strand measurements will be discussed, focusing on coil peak fields in straight section and end region, bore field homogeneity, and stress on the conductor during assembly, cool-down and excitation. [ABSTRACT FROM PUBLISHER]

Published
2012
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47. Mechanical Behavior of HQ01, a \Nb3\Sn Accelerator-Quality Quadrupole Magnet for the LHC Luminosity Upgrade.

Author

Ferracin, P., Ambrosio, G., Anerella, M., Bossert, R., Caspi, S., Chlachidze, G., Cheng, D. W., Dietderich, D. R., Felice, H., Ghosh, A., Hafalia, A. R., Lizarazo, J., Marchevsky, M., Joseph, J., Sabbi, G., Schmalzle, J., Wanderer, P., Wang, X., and Zlobin, A. V.

Subjects
MECHANICAL behavior of materials, QUADRUPOLES, LARGE Hadron Collider, LUMINOSITY, FIELD emission electron microscopy
Abstract

HQ01 is a superconducting quadrupole magnet under development by the LHC Accelerator Research Program (LARP) as a part of an R&D effort to demonstrate that Nb3Sn magnet technology is a viable option for a future luminosity upgrade of the LHC. The design is characterized by a 120 mm bore, a maximum gradient of 219 T/m at 1.9 K, and a support structure based on an aluminum shell pre-tensioned by water-pressurized bladders. The shell-based structure concept has already been successfully implemented in previous LARP quadrupole magnets. In HQ01, the structure incorporates additional features designed to provide full alignment between the support structure components and the coils. Specifically, the coil azimuthal alignment is achieved through outer layer pole keys which, by intercepting part of the force applied by bladders and shell, remain clamped to bolted aluminum collars from assembly to full excitation. A sequence of assemblies and cool-downs were executed with different keys sizes to characterize the alignment system and its impact on coil pre-load, at both room temperature and at 4.5 K. This paper reports on the mechanical behavior of the HQ01, by summarizing the strain gauge data and comparing them with FEM model predictions. [ABSTRACT FROM PUBLISHER]

Published
2012
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48. Test Results of 15 T Nb3Sn Quadrupole Magnet HQ01 with a 120 mm Bore for the LHC Luminosity Upgrade.

Author

Caspi, S., Ambrosio, G., Anerella, M., Barzi, E., Bingham, B., Bossert, R., Cheng, D. W., Chlachidze, G., Dietderich, D. R., Felice, H., Ferracin, P., Ghosh, A., Hafalia, A. R., Hannaford, C. R., Joseph, J., Kashikhin, V. V., Sabbi, G. L., Schmalzle, J., Wanderer, P., and Xiaorong, W.

Subjects
QUADRUPOLES, LARGE Hadron Collider, SUPERCONDUCTING magnets, MAGNETIC separation, ALUMINUM, MECHANICAL behavior of materials, ELECTRIC coils, ELECTRICAL conductors
Abstract

In support of the luminosity upgrade of the Large Hadron Collider (LHC), the US LHC Accelerator Research Program (LARP) has been developing a 1-meter long, 120 mm bore Nb3Sn IR quadrupole magnet (HQ). With a short sample gradient of 219 T/m at 1.9 K and a conductor peak field of 15 T, the magnet will operate under higher forces and stored-energy levels than that of any previous LARP magnet models. In addition, HQ has been designed to incorporate accelerator quality features such as precise coil alignment and adequate cooling. The first 6 coils (out of the 8 fabricated so far) have been assembled and used in two separate tests—HQ01a and HQ01b. This paper presents design parameters, summary of the assemblies, the mechanical behavior as well as the performance of HQ01a and HQ01b. [ABSTRACT FROM AUTHOR]

Published
2011
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49. Recent Test Results of the High Field Nb3Sn Dipole Magnet HD2.

Author

Ferracin, P., Bingham, B., Caspi, S., Cheng, D. W., Dietderich, D. R., Felice, H., Hafalia, A. R., Hannaford, C. R., Joseph, J., Lietzke, A. F., Lizarazo, J., Sabbi, G., and Wang, X.

Subjects
MAGNETIC dipoles, NIOBIUM compounds, TESTING laboratories, MAGNETIC circuits
Abstract

The 1 m long Nb3Sn dipole magnet HD2, fabricated and tested at Lawrence Berkeley National Laboratory, represents a step towards the development of block-type accelerator quality magnets operating in the range of 13-15 T. The magnet design features two coil modules composed of two layers wound around a titanium-alloy pole. The layer 1 pole includes a round cutout to provide room for a bore tube with a clear aperture of 36 mm. After a first series of tests where HD2 reached a maximum bore field of 13.8 T, corresponding to an estimated peak field on the conductor of 14.5 T, the magnet was disassembled and reloaded without the bore tube and with a clear aperture increased to 43 mm. We describe in this paper the magnet training observed in two consecutive tests after the removal of the bore tube, with a comparison of the quench performance with respect to the previous tests. An analysis of the voltage signals recorded before and after training quenches is then presented and discussed, and the results of coil visual inspections reported. [ABSTRACT FROM AUTHOR]

Published
2010
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50. Assembly and Loading of LQS01, a Shell-Based 3.7 m Long Nb3Sn Quadrupole Magnet for LARP.

Author

Ferracin, P., Ambrosio, G., Anerella, M., Bingham, B., Bossert, R., Caspi, S., Cheng, D. W., Chlachidze, G., Felice, H., Hafalia, A. R., Hannaford, C. R., Mumper, W., Nobrega, F., Prestemon, S., Sabbi, G. L., Schmalzle, J., Sylvester, C., Tartaglia, M., Wanderer, P., and Zlobin, A. V.

Subjects
QUADRUPOLES, MAGNETS, NIOBIUM compounds, MAGNETIC circuits, FINITE element method
Abstract

The LHC Accelerator Research Program (LARP) has been engaged in the fabrication of the 3.7 m long quadrupole magnet LQS01 in order to demonstrate that Nb3Sn magnets are a viable option for future LHC Luminosity upgrades. The LQS01 design, a scale-up of the 1 m long Technology Quadrupole TQS, includes four 3.4 m long cos(theta) coils contained in a support structure based on four 1 m long aluminum shells pre-tensioned with water-pressurized bladders (shell-type structure). In order to verify assembly procedures and loading operations, the structure was pre-stressed around solid aluminum "dummy coils" and cooled-down to 77 K. Mechanical behavior and stress variations were monitored with strain gauges mounted on the structure and on the dummy coils. The dummy coils were then replaced with Nb3Sn coils in a second assembly and loading procedure, in preparation for the cool-down and test. This paper reports on the cool-down test with dummy coils and on the assembly and loading of LQS01, with a comparison between 3D finite element model predictions and strain gauge data. [ABSTRACT FROM AUTHOR]

Published
2010
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