Radiation-induced thermoelectric sensitivity in the mineral-insulated cable of magnetic diagnostic coils for ITER

T. Nishitani, G. Vayakis, M. Yamauchi, T. Sugie, T. Kondoh, Tatsuo Shikama, E. Ishitsuka, H. Kawashima

研究成果: Conference article査読

15 被引用数 (Scopus)

抄録

Magnetic coils are indispensable for plasma position control in tokamaks. For ITER, non-inductive voltages generated under irradiation have to be reduced to well below 1 μV in order to support long pulse (3000 s) operation. In situ measurements of the differential voltage between the ends of two magnetic coils wound with mineral-insulated (MI) cable have been carried out at the JMTR fission reactor. The MI cables of the two magnetic coils had copper center conductor with diameter 0.5 and 0.8 mm, respectively, stainless steel outer sheath and MgO insulation. The measured differential voltage for the two MI cables increased with neutron fluence, reaching 4.5 and -0.7 μV in the two coils, at a fast neutron fluence of 1.26×1023 n/m2. The magnitude of the measured voltage can be explained by thermoelectric potentials, enabled mainly by non-uniform transmutation and displacement damages of the copper core of the cable.

本文言語English
ページ(範囲)1461-1465
ページ数5
ジャーナルJournal of Nuclear Materials
329-333
1-3 PART B
DOI
出版ステータスPublished - 2004 8月 1
イベントProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
継続期間: 2003 12月 72003 12月 12

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 材料科学(全般)

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