CRYOGENIC SYSTEM FOR J‐PARC NEUTRINO SUPERCONDUCTING MAGNET BEAM LINE—DESIGN, CONSTRUCTION AND PERFORMANCE TEST
CRYOGENIC SYSTEM FOR J‐PARC NEUTRINO SUPERCONDUCTING MAGNET BEAM LINE—DESIGN, CONSTRUCTION AND PERFORMANCE TEST
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J-PARC 中微子超导磁束线低温系统——设计、建造和性能测试
DOI：
10.1063/1.3422400
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Nakashima
中科院分区：
文献类型：
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作者：
Y. Makida;H. Ohhata;T. Okamura;S. Suzuki;O. Araoka;T. Ogitsu;N. Kimura;T. Nakamoto;K. Sasaki;S. Kaneda;Tadayuki Takahashi;A. Ito;M. Nagami;T. Kumaki;T. Nakashima
自2005年以来，质子加速器研究中心J - PARC建造了一个氦低温装置，用于冷却中微子束流线上的一串超导磁体。它由1.4 MPa 160g /s的螺杆压缩机、1.5 kW的制冷机、300g /s的离心SHE泵和外围设备组成。系统集成完成后，进行了性能测试。在无磁体的初步冷却试验中，在0.4 MPa和4.5 K条件下，循环超临界氦流量为300 g/s，低温系统的冷却能力为522 W。随后，对磁铁进行了全面的系统测试。磁铁被成功地充电到5000 A的极限电流，超过了4400 A的标称电流。本文介绍了该装置的设计和性能测试结果。
A helium cryogenic plant has been constructed in the proton accelerator research complex, J‐PARC, to cool a string of superconducting magnets in the neutrino beam line since 2005. It consists of a screw compressor with a capacity of 160 g/s at 1.4 MPa, a 1.5 kW refrigerator, a centrifugal SHE pump with a flow rate of 300 g/s and peripherals. After system integration, performance tests have been carried out. In a preliminary cooling test without magnets, the cryogenic system attained a cooling capacity of 522 W by circulating supercritical helium flow of 300 g/s at 0.4 MPa and at 4.5 K. Afterwards a full system test with the magnets was carried out. The magnets were successfully charged up to an ultimate current of 5000 A beyond a nominal current of 4400 A. This paper describes the plant design and the result of performance measurements.