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

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 discha...

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Bibliographic Details
Main Authors: Klyukhin, V.I., Campi, D., Cure, B., Gaddi, A., Gerwig, H., Grillet, J.P., Herve, A., Loveless, R., Smith, R.P.
Format: Conference Proceeding
Language:English
Subjects:
Collision mitigation
Detectors
Eddy currents
Magnetic analysis
Magnetic flux
Mesons
Solenoids
Superconducting coils
Superconducting magnets
Voltage
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Summary: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.
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2004.1462271