Torus CLAS12-Superconducting Magnet Quench Analysis

Author

Kashikhin, V.S. ; Elouadhiri, L. ; Ghoshal, P.K. ; Kashy, D. ; Makarov, A. ; Pastor, O. ; Quettier, Lionel ; Velev, Genadi ; Wiseman, M.

Author_Institution

Fermi Nat. Accel. Lab., Batavia, IL, USA

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

The JLAB Torus magnet system consists of six superconducting trapezoidal racetrack-type coils assembled in a toroidal configuration. These coils are wound with SSC-36 Nb-Ti superconductor and have the peak magnetic field of 3.6 T. The first coil manufacturing based on the JLAB design began at FNAL. The large magnet system dimensions (8 m diameter and 14 MJ of stored energy) dictate the need for quench protection. Each coil is placed in an aluminum case mounted inside a cryostat and cooled by 4.6 K supercritical helium gas flowing through a copper tube attached to the coil ID. The large coil dimensions and small cryostat thickness drove the design to challenging technical solutions, suggesting that Lorentz forces due to transport currents and eddy currents during quench and various failure scenarios are analyzed. The paper covers the magnet system quench analysis using the OPERA3d Quench code.

Keywords

cryostats; eddy currents; magnetic cooling; superconducting coils; superconducting magnets; JLAB Torus magnet system; Lorentz forces; OPERA3d quench code; Torus CLAS12-superconducting magnet quench analysis; cryostat; eddy currents; failure; quench protection; superconducting trapezoidal racetrack-type coils; supercritical helium gas; temperature 4.6 K; transport currents; Coils; Eddy currents; Magnetic noise; Magnetic shielding; Superconducting magnets; Toroidal magnetic fields; 3-D simulations; Eddy currents; Lorentz forces; failure analysis; magnetic field; quench; superconducting magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2299531

Filename

6712065