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Title: The CLAS12 superconducting magnets

Abstract

As part of the Jefferson Lab 12 GeV upgrade, the Hall B CLAS12 system requires two superconducting iron-free magnets — a torus and a solenoid. The physics requirements to maximize space for the detectors guided engineers toward particular coil designs for each of the magnets which, in turn, led to the choice of using conduction cooling. The torus consists of 6 trapezoidal NbTi coils connected in series with an operating current of 3770 A. The solenoid is an actively shielded 5 T magnet consisting of 5 NbTi coils connected in series operating at 2416 A. Within the hall, the two magnets are located in close proximity to each other and are completely covered both inside and outside by particle detectors. Stringent size limitations were imposed for both magnets and introduced particular design and fabrication challenges. This paper describes the design, construction, installation, commissioning, and operation of the two magnets.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1603947
Alternate Identifier(s):
OSTI ID: 1602884
Report Number(s):
JLAB-PHY-20-2929; DOE-OR-23177-4857
Journal ID: ISSN 0168-9002; TRN: US2104166
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 962; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CLAS Collaboration; Superconducting; Magnets; Torus; Solenoid; Quench; Mapping; Toroid

Citation Formats

Fair, R., Baltzell, N., Bachimanchi, R., Biallas, G., Burkert, V. D., Campero-Rojas, P., Elementi, L., Elouadrhiri, L., Eng, B., Ghoshal, P. K., Hogan, J., Insley, D., Kashikhin, V., Kashy, D., Krave, S., Kumar, O., Laney, M., Legg, R., Lagerquist, V., Lester, M., Lemon, T., Lung, A., Luongo, C., Matalevich, J., Mestayer, M. D., Miller, R., Moore, W., Newton, J., Nobrega, F., Pastor, O., Philip, S., Rajput-Ghoshal, R., Rao Ganni, V., Rode, C., Sandoval, N., Spiegel, S., Tilles, D., Tremblay, K., Velev, G., Wilson, C., Wiseman, M., and Young, G. R. The CLAS12 superconducting magnets. United States: N. p., 2020. Web. doi:10.1016/j.nima.2020.163578.
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Fair, R., Baltzell, N., Bachimanchi, R., Biallas, G., Burkert, V. D., Campero-Rojas, P., Elementi, L., Elouadrhiri, L., Eng, B., Ghoshal, P. K., Hogan, J., Insley, D., Kashikhin, V., Kashy, D., Krave, S., Kumar, O., Laney, M., Legg, R., Lagerquist, V., Lester, M., Lemon, T., Lung, A., Luongo, C., Matalevich, J., Mestayer, M. D., Miller, R., Moore, W., Newton, J., Nobrega, F., Pastor, O., Philip, S., Rajput-Ghoshal, R., Rao Ganni, V., Rode, C., Sandoval, N., Spiegel, S., Tilles, D., Tremblay, K., Velev, G., Wilson, C., Wiseman, M., & Young, G. R. The CLAS12 superconducting magnets. United States. https://doi.org/10.1016/j.nima.2020.163578
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Fair, R., Baltzell, N., Bachimanchi, R., Biallas, G., Burkert, V. D., Campero-Rojas, P., Elementi, L., Elouadrhiri, L., Eng, B., Ghoshal, P. K., Hogan, J., Insley, D., Kashikhin, V., Kashy, D., Krave, S., Kumar, O., Laney, M., Legg, R., Lagerquist, V., Lester, M., Lemon, T., Lung, A., Luongo, C., Matalevich, J., Mestayer, M. D., Miller, R., Moore, W., Newton, J., Nobrega, F., Pastor, O., Philip, S., Rajput-Ghoshal, R., Rao Ganni, V., Rode, C., Sandoval, N., Spiegel, S., Tilles, D., Tremblay, K., Velev, G., Wilson, C., Wiseman, M., and Young, G. R. Fri . "The CLAS12 superconducting magnets". United States. https://doi.org/10.1016/j.nima.2020.163578. https://www.osti.gov/servlets/purl/1603947.
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@article{osti_1603947,
title = {The CLAS12 superconducting magnets},
author = {Fair, R. and Baltzell, N. and Bachimanchi, R. and Biallas, G. and Burkert, V. D. and Campero-Rojas, P. and Elementi, L. and Elouadrhiri, L. and Eng, B. and Ghoshal, P. K. and Hogan, J. and Insley, D. and Kashikhin, V. and Kashy, D. and Krave, S. and Kumar, O. and Laney, M. and Legg, R. and Lagerquist, V. and Lester, M. and Lemon, T. and Lung, A. and Luongo, C. and Matalevich, J. and Mestayer, M. D. and Miller, R. and Moore, W. and Newton, J. and Nobrega, F. and Pastor, O. and Philip, S. and Rajput-Ghoshal, R. and Rao Ganni, V. and Rode, C. and Sandoval, N. and Spiegel, S. and Tilles, D. and Tremblay, K. and Velev, G. and Wilson, C. and Wiseman, M. and Young, G. R.},
abstractNote = {As part of the Jefferson Lab 12 GeV upgrade, the Hall B CLAS12 system requires two superconducting iron-free magnets — a torus and a solenoid. The physics requirements to maximize space for the detectors guided engineers toward particular coil designs for each of the magnets which, in turn, led to the choice of using conduction cooling. The torus consists of 6 trapezoidal NbTi coils connected in series with an operating current of 3770 A. The solenoid is an actively shielded 5 T magnet consisting of 5 NbTi coils connected in series operating at 2416 A. Within the hall, the two magnets are located in close proximity to each other and are completely covered both inside and outside by particle detectors. Stringent size limitations were imposed for both magnets and introduced particular design and fabrication challenges. This paper describes the design, construction, installation, commissioning, and operation of the two magnets.},
doi = {10.1016/j.nima.2020.163578},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 962,
place = {United States},
year = {Fri May 01 00:00:00 EDT 2020},
month = {Fri May 01 00:00:00 EDT 2020}
}
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https://doi.org/10.1016/j.nima.2020.163578
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