Hydrogen flux measurements with permeation probes in spherical tokamak QUEST

A. Kuzmin, H. Zushi, I. Takagi, S. K. Sharma, Y. Hirooka, M. Kobayashi, M. Sakamoto, K. Hanada, T. Onchi, Y. Oyama, N. Youshida, K. Nakamura, A. Fujisawa, H. Idei, Y. Nagashima, M. Hasegawa, K. Mishra

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Poloidal and radial distributions of the hydrogen flux, both atomic and ion, to the plasma facing materials (PFMs) are measured with four fixed and one movable PdCu membrane probes in the QUEST spherical tokamak. Direct information about hydrogen retention in the areas far from main plasma-wall interaction is essential because the significant part of the global retention is due to atomic hydrogen. Incident hydrogen flux Γinc is numerically reconstructed by fitting the experimentally measured hydrogen flux Γp, permeated through the membrane. The sensitivity of the probe is improved when compared with other work which allows dynamic changes of the retention flux to be monitored, allowing detection of 10% of the Γinc modulation, or ∼1017 H m−2s−1.

本文言語英語
ページ(範囲)178-182
ページ数5
ジャーナルVacuum
129
DOI
出版ステータス出版済み - 7 1 2016

All Science Journal Classification (ASJC) codes

  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜

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