Development of Large-Current Indirectly Cooled Radiation-Resistant Magnets
| Autor: | S. Sawada, Akihiro Toyoda, Y. Katoh, Hiroyuki Noumi, Y. Saitoh, Erina Hirose, Hiroaki Watanabe, Yoshihisa Shirakabe, Yoshihiro Suzuki, Michifumi Minakawa, Yoichi Sato, Kazuhiro Tanaka, Minoru Takasaki, Keizo Agari, Ryotaro Muto, K. Yahata, Y. Satoh, Masaharu Ieiri, Hitoshi Takahashi, Megumi Naruki, Yutaka Yamanoi |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
010308 nuclear & particles physics Busbar Mechanical engineering Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Nuclear magnetic resonance Electromagnetic coil Electrical equipment Magnet 0103 physical sciences Water cooling Electrical and Electronic Engineering Current (fluid) 010306 general physics Electrical conductor Casing |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 26:1-4 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2016.2516591 |
| Popis: | This paper reports developments of indirectly cooled radiation-resistant magnet coils, which can be loaded with 2000-A dc. This current capacity is required for the most upstream magnets of a new high-momentum beam line to be constructed in the future extension of the J-PARC hadron experimental facility. Indirectly cooled coils using solid-conductor-type mineral insulation cables (MICs) and stainless-steel water pipes were adopted to achieve high radiation hardness. MICs were sandwiched by independent cooling water pipes and stacked in a casing, and the entire coil assembly was filled with solder. However, the maximum load applied to the indirectly cooled MIC coils was limited to 1000-A dc, mainly owing to a heat problem at the end parts of the coils. In pursuit of the required current capability, we have carried out load tests using a test sample of the end parts, which consists of MIC current leads and a copper bus bar connecting the MIC conductors, instead of a whole MIC coil. By improving the structure of the end parts, we have succeeded to operate the test piece stably with 2000-A dc in a vacuum. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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