TY - JOUR
T1 - Effect of neutron irradiation on high-temperature superconductors
AU - Aoki, Toru
AU - Ueda, Hiroshi
AU - Ishiyama, Atsushi
AU - Miyahara, Nobuyuki
AU - Kashima, Naoji
AU - Nagaya, Shigeo
N1 - Funding Information:
Manuscript received August 03, 2010; accepted December 15, 2010. Date of publication January 28, 2011; date of current version May 27, 2011. This work was supported by the Ministry of Education, Science, Sports and Culture by Grant-in-Aid for Scientific Research (B) 20360130. T. Aoki, H. Ueda, and A. Ishiyama are with Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan (e-mail: atsushi@waseda.jp). N. Miyahara is with the National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage-ku, Chiba-shi 263-8555, Japan. N. Kashima and S. Nagaya are with Chubu Electric Power Company, 20-1 Kitasekiyama, Ohtakacho, Midori-ku, Nagoya-shi 459-8522, Japan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2010.2101999
PY - 2011/6
Y1 - 2011/6
N2 - In recent years, rapid improvements have been made to the quality of high-temperature superconductors (HTSs). We carried out a feasibility study on the application of HTS coils in medical accelerators, which are used for particle cancer therapy. In this application, HTSs are exposed to radiation. As a result, the HTS conductors become radioactive, thereby making the operation and maintenance of the reactors or accelerators difficult. Further, radiation affects the superconducting characteristics and causes an increase in the amount of nuclear waste generated. Therefore, it is necessary to investigate the effect of radiation on HTSs. In this study, we carried out irradiation experiments on Bi-2223 and YBCO tapes at room temperature by using 14-MeV neutrons (dose: 77 kGy). We also performed radioactive analyses on HTS tapes and carried out current-voltage (I - V) measurements on the tapes immersed in a liquid-nitrogen (LN2) bath, before and after irradiation. The irradiation to YBCO had been conducted in the past[1]. We irradiated neutrons to YBCO and Bi-2223 tapes on the assumption that they will be applied by the medical accelerator.
AB - In recent years, rapid improvements have been made to the quality of high-temperature superconductors (HTSs). We carried out a feasibility study on the application of HTS coils in medical accelerators, which are used for particle cancer therapy. In this application, HTSs are exposed to radiation. As a result, the HTS conductors become radioactive, thereby making the operation and maintenance of the reactors or accelerators difficult. Further, radiation affects the superconducting characteristics and causes an increase in the amount of nuclear waste generated. Therefore, it is necessary to investigate the effect of radiation on HTSs. In this study, we carried out irradiation experiments on Bi-2223 and YBCO tapes at room temperature by using 14-MeV neutrons (dose: 77 kGy). We also performed radioactive analyses on HTS tapes and carried out current-voltage (I - V) measurements on the tapes immersed in a liquid-nitrogen (LN2) bath, before and after irradiation. The irradiation to YBCO had been conducted in the past[1]. We irradiated neutrons to YBCO and Bi-2223 tapes on the assumption that they will be applied by the medical accelerator.
KW - High-temperature superconductors
KW - Neutron radiation effects
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U2 - 10.1109/TASC.2010.2101999
DO - 10.1109/TASC.2010.2101999
M3 - Article
AN - SCOPUS:79957932139
SN - 1051-8223
VL - 21
SP - 3200
EP - 3202
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3 PART 3
M1 - 5704166
ER -
