Analysis of Eddy Current Distributions in the CMS Magnet Yoke During the Solenoid Discharge

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 online during the entire discharge and integrated offline 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 the calculations are reported.

4 pages, 5 figures, 8 references

References in corpus (2)

• 3D Magnetic Analysis of the CMS Magnet
• Developing the Technique of Measurements of Magnetic Field in the CMS Steel Yoke Elements With Flux-Loops and Hall Probes

Cited by in corpus (8)

• Measurement of the CMS Magnetic Field
• The CMS Magnetic Field Map Performance
• Measuring the Magnetic Flux Density in the CMS Steel Yoke
• Using the Standard Linear Ramps of the CMS Superconducting Magnet for Measuring the Magnetic Flux Density in the Steel Flux Return Yoke
• Validation of the CMS Magnetic Field Map
• The CMS Magnetic Field Measuring and Monitoring Systems
• Flux Loop Measurements of the Magnetic Flux Density in the CMS Magnet Yoke
• Measuring the Magnetic Flux Density with Flux Loops and Hall Probes in the CMS Magnet Flux Return Yoke