Test operations of the VENUS superconducting magnet at KEK

Details Test operations of the VENUS superconducting magnet at KEK Test operations of the VENUS superconducting magnet at KEK

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nimpa.254..317a&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 254, Issue 2, p. 317-326.

Physics

10

Scientific paper

The superconducting magnet of the VENUS detector was successfully operated with a central field of 0.75 T. A cryogenic system kept the coil temperature to below 4.5 K. When a coil quench was induced by built-in heaters, the stored energy of 11.7 MJ was safely extracted from the magnet to the outside dump resistor. The iron structure of the magnet yoke supported the magnetic force of about 230 t with a maximum elastic deformation of 0.4 mm. The maximum leakage field at the location of the barrel electromagnetic calorimeter was 33 G. The magnetic field was mapped in the solenoid bore by an NMR probe and by three-dimensional Hall probes with an accuracy of order 10-4. The field was confirmed to be uniform within 0.3% deviation in the spatial region of a central drift chamber.
Present address: National Laboratory for High Energy Physics, Tsukuba, Ibaraki, 305, Japan.

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