Analysis of eddy current distributions in the CMS magnet yoke during the solenoid discharge

Author

Klyukhin, V.I. ; Campi, D. ; Curé, B. ; Gaddi, A. ; Gerwig, H. ; Grillet, J.P. ; Hervé, A. ; Loveless, R. ; Smith, R.P.

Author_Institution

Skobeltsyn Inst. of Nucl. Phys., Moscow State Univ., Russia

Volume

1

fYear

2004

fDate

16-22 Oct. 2004

Firstpage

624

Abstract

Flux loops have been installed on selected segments of the magnetic flux return yoke of the 4 T superconducting coil of the Compact Muon Solenoid (CMS) detector under construction at CERN. Voltages induced in the loops during discharge of the solenoid will be sampled on-line during the entire discharge and integrated off-line to provide a measurement of the initial magnetic flux density in steel at the maximum field to an accuracy of a few percent. Although the discharge of the solenoid is rather slow (190 s time constant), the influence of eddy currents induced in the yoke elements should be estimated. The calculation of eddy currents is performed with Vector Fields program ELEKTRA. The results of calculations are reported.

Keywords

discharges (electric); eddy currents; position sensitive particle detectors; solenoids; superconducting coils; superconducting magnets; superconducting particle detectors; 190 s; 4 T; CMS magnet yoke; Compact Muon Solenoid detector; ELEKTRA program; Vector Fields program; eddy current distributions; flux loops; magnetic flux density; magnetic flux return yoke; maximum field; solenoid discharge; superconducting coil; yoke elements; Collision mitigation; Detectors; Eddy currents; Magnetic analysis; Magnetic flux; Mesons; Solenoids; Superconducting coils; Superconducting magnets; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2004 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-8700-7

Electronic_ISBN

1082-3654

Type

conf

DOI

10.1109/NSSMIC.2004.1462271

Filename

1462271