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Prototype of superferric quadrupole magnets for the BigRIPS separator at RIKEN
被引:38
|作者:
Kusaka, K
Kubo, T
Mizoi, Y
Yoshida, K
Yoshida, A
Tominaka, T
Yano, Y
Tsuchihashi, T
Kakutani, N
Sato, K
机构:
[1] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[2] Toshiba Co Ltd, Yokohama, Kanagawa 2300045, Japan
关键词:
accelerator magnets;
particle beam focusing;
superconducting magnets;
D O I:
10.1109/TASC.2004.829102
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
Three superferric quadrupoles with a pole-tip radius of 170 mm and a design field gradient of 14.1 T/m have been constructed for use as spectrometer elements. All three quadrupoles are assembled into a single cryostat and cooled by liquid-He bath cooling method. A small Gifford-McMahon/Joule-Thomson (GM/JT) cooler, mounted on the cryostat, liquefies He gas that evaporates in the He vessel. The high-T-c superconducting current leads and radiation shield surrounding the He-vessel, cooled by a small GM cooler, reduce the heat load of the He vessel. Both cryocoolers operate using separate water-cooled compressors and allow us a stand-alone operation of the quadrupole magnets without big cryogenic plant. Results of quench protection tests, measured heat loads and field-maps are presented.
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页码:310 / 315
页数:6
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