Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Fumio SUMIYOSHI"'
Autor:
Toshinari ANDO, Shinichi NOSE, Toshikazu KANBAYASHI, Yuichiro ODA, Yoshikazu TAKAHASHI, Teruo MATSUSHITA, Fumio SUMIYOSHI, Susumu SHIMAMOTO, Teruo NOGUCHI, Yoshitane AKIYAMA
Publikováno v:
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan). 55:203-208
Autor:
Shuma Kawabata, Kazuhide Tanaka, Edmund Soji Otabe, M Kuichi, K Matsushima, Nagato Yanagi, Akifumi Kawagoe, Teruo Matsushita, Fumio Sumiyoshi, Tsuyoshi Wakuda, Y Yoshidome, Toshiyuki Mito
Publikováno v:
IEEE Transactions on Applied Superconductivity. 21:1612-1615
The MgB2 coil wound with a parallel conductor composed of two MgB2 tapes with insulation has been developed. The tape is obtained by the rolling process from the round wire which is fabricated by in-situ method. The performances of tapes, such as cri
Publikováno v:
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan). 46:481-488
Publikováno v:
Physica C: Superconductivity and its Applications. 470:1860-1864
We have developed a new monitoring system to detect an unusual event in the superconducting coils without direct contact on the coils, using Poynting’s vector method. In this system, the potential leads and pickup coils are set around the supercond
Autor:
Edmund Soji Otabe, Shuma Kawabata, K Matsushima, Y. Wakabayashi, Nagato Yanagi, Akifumi Kawagoe, Y Yoshidome, Teruo Matsushita, Tsuyoshi Wakuda, Miyoshi Takahashi, Fumio Sumiyoshi, Toshiyuki Mito, Masaru Kiuchi
Publikováno v:
IEEE Transactions on Applied Superconductivity. 20:1601-1604
We have proposed MgB2 multifilamentary tapes with high critical current densities and low ac losses under external magnetic fields which is parallel to the tape face. The purpose of this proposal is to develop the MgB2 new conductors composed of plur
Autor:
Y. Wakabayashi, Akifumi Kawagoe, Miyoshi Takahashi, Nagato Yanagi, Y. Fukushima, M. Okada, Toshiyuki Mito, Fumio Sumiyoshi
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:2686-2689
MgB2 multifilamentary tapes with 6 twisted filaments were fabricated and it was experimentally proven that both an increase in critical currents and a decrease in ac losses in the tapes due to deformation of the tapes with high aspect ratio can be si
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:2341-2344
A new quench monitoring system by using the Poynting vector method was proposed. This new system can indirectly detect normal transitions which are suddenly induced during an operation of superconducting coils. In this system, the superconducting coi
Publikováno v:
Physica C: Superconductivity. 468:1734-1738
It is important to evaluate the characteristics of the current distributions in the HTS tapes and conductors in order to realize HTS power devices. In this study, we have developed a simple measurement method to evaluate the current distributions in
Publikováno v:
IEEE Transactions on Applied Superconductivity. 18:1147-1150
In order to realize HTS power devices with high performances, it is important to evaluate the characteristics of HTS conductors theoretically and experimentally. In the experimental evaluation, an ac power supply with a large current capacity and few
Autor:
Hirotaka Chikaraishi, Toshiyuki Mito, Masataka Iwakuma, Tsutomu Hemmi, A. Nakamura, R. Abe, H. Ogawa, S. Tsukuda, T. Baba, Akifumi Kawagoe, K. Okumura, A. Kuge, Mitsuhiro Yokota, Fumio Sumiyoshi
Publikováno v:
IEEE Transactions on Applied Superconductivity. 18:783-786
AC losses in the conduction-cooled low temperature superconducting (LTS) pulse coil with stored energy of 1 MJ are estimated. The 1 MJ coil is a superconducting pulse coil for 1 MW, 1 sec UPS-SMES. UPS-SMES is an uninterruptible power supply (UPS) wi