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Development of Large-Current Indirectly Cooled Radiation-Resistant Magnets
- Source :
- IEEE Transactions on Applied Superconductivity. 26:1-4
- Publication Year :
- 2016
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2016.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- ISSN :
- 23787074 and 10518223
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Applied Superconductivity
- Accession number :
- edsair.doi...........bf94edc39445efc0ac495263bbe5c2e2