Commissioning Validation of CLAS-12 Torus Magnet Protection and Cryogenic Safety System

This paper provides an overview of a test to confirm how the electromagnetic loss and energy balance in the CLAS12 Torus magnet system affect the cryogenics system in the event of a fast dump or quench. The test was a part of the commissioning activities within Hall B for the 12 GeV Accelerator Upgr...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2018-09, Vol.28 (6), p.1-8
Main Authors: Ghoshal, Probir K., Biallas, George H., Fair, Ruben J., Kashy, David H., Matalevich, Joseph R., Luongo, Cesar A.
Format: Article
Language:English
Subjects:
Coils
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Conduction cooling
Cooling
energy balance
fast discharge
Helium
magnet
Magnetic noise
Magnetic shielding
quench
safety valve
Superconducting magnets
Toroidal magnetic fields
torus
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Summary:This paper provides an overview of a test to confirm how the electromagnetic loss and energy balance in the CLAS12 Torus magnet system affect the cryogenics system in the event of a fast dump or quench. The test was a part of the commissioning activities within Hall B for the 12 GeV Accelerator Upgrade project at Jefferson Laboratory in November 2016. The test, as carried out, validated the design of the torus magnet protection and cryogenic safety systems. This magnet is unique in that it comprises six superconducting coils that are individually conduction-cooled by helium, thereby providing an element of thermal and mechanical decoupling between the coils. As such, its behavior under a fast dump condition (and even a quench) is markedly different from that of more conventional bath-cooled superconducting magnets.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2018.2841928