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Test Results of Superconducting Combined Function Magnets for the J-PARC Neutrino Beam Line

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21 Author(s)
Sasaki, K.-i. ; High Energy Accel. Res. Organ. (KEK), Tsukuba ; Nakamoto, T. ; Kimura, N. ; Tomaru, T.
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Superconducting combined function magnets for the J-PARC (Japan Proton Accelerator Research Complex) neutrino experiment have been successfully developed at High Energy Accelerator Research Organization, KEK. The first prototype magnet reassembled for the quench protection studies, and the cold test result indicated that the eight quench protection heaters are effective for the safe protection of the magnet. Three production magnets have been fabricated and tested at 4.5 K, 1 atm, in a vertical cryostat, and the excellent excitation and quench performances are observed. In the field measurement during cold tests, all the magnets indicated the field qualities good enough to fulfill the specification. The field measurement at room temperature has been also performed with the three production magnets for checking the dipole field component. The results are consistent with the computation.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:17 ,  Issue: 2 )

Date of Publication:

June 2007

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