2003/06/01 by M. Iwakuma, H. Miyazaki, Hiroshi Miyazaki +13 · 1 citation
Engineering · Physics and Astronomy · #Particle accelerators and beam dynamics #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications
paper · doi:10.1109/tasc.2003.812938
openalex publication_date 2003/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
We designed and fabricated a 4 kJ conduction-cooled superconducting pulse coil with a 6-strand interlayer-transposed parallel conductor composed of Bi2223 multifilamentary tapes. We adopted the helium gas forced-flow cooling system where the helium gas flowed inside a copper pipe soldered with the flanges of brass. We succeeded in the continuous pulse operation with an amplitude of 500 A-1.6 T at a sweep rate of 140 A/s at 30 K as designed. Even in the ac operation with an ac loss of 120 W, the difference in temperature inside the winding was only 5 K and it was possible to hold the coil temperature around 30 K. In this paper, we report the design and the test results of the coil system from the aspect of ac loss and thermal properties.