Test operations of the VENUS superconducting magnet at KEK

R. Arai, O. Araoka, Y. Doi, T. Haruyama, N. Ishihara, M. Kawai, Y. Kondo, T. Matsui, T. Mito, M. Sakuda, S. Suzuki, M. Tadano, M. Wake, M. Kuramoto, K. Ishibashi, K. Maehata

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Abstract

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.

Original languageEnglish
Pages (from-to)317-326
Number of pages10
JournalNuclear Inst. and Methods in Physics Research, A
Volume254
Issue number2
DOIs
Publication statusPublished - Feb 15 1987

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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    Arai, R., Araoka, O., Doi, Y., Haruyama, T., Ishihara, N., Kawai, M., Kondo, Y., Matsui, T., Mito, T., Sakuda, M., Suzuki, S., Tadano, M., Wake, M., Kuramoto, M., Ishibashi, K., & Maehata, K. (1987). Test operations of the VENUS superconducting magnet at KEK. Nuclear Inst. and Methods in Physics Research, A, 254(2), 317-326. https://doi.org/10.1016/0168-9002(87)90679-6