Title :
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
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;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1462271
