Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling

被引：0
|
作者：
Kuzmin, A. [1 ]
Miura, K. [2 ]
Kobayashi, M. [2 ]
Hanada, K. [3 ]
Fujii, K. [1 ,4 ]
Shikama, T. [1 ]
Hasuo, M. [1 ]
Zushi, H. [3 ]
机构：
[1] Kyoto Univ, Kyotodaigaku Katsura Nishikyo ku, Kyoto, Kyoto 6158540, Japan
[2] Natl Inst Fus Sci, 322-6 Oroshi cho, Toki, Gifu 5095292, Japan
[3] Kyushu Univ, Res Inst Appl Mech, 6-1 Kasugakoen Kasuga, Fukuoka 8168580, Japan
[4] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
FUSION ENGINEERING AND DESIGN | 2023年 / 189卷
关键词：
Hydrogen; Atomic hydrogen; Steady state tokamak operation; PdCu; Permeation; MOLECULAR-HYDROGEN; DRIVEN PERMEATION; PLASMA; DIAGNOSTICS;
D O I：
10.1016/j.fusengdes.2023.113462
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
A new combination diagnostic as a hydrogen recycling monitor in harsh conditions is proposed. Combining permeation membrane probe with a Langmuir probe provides a possibility to measure both atomic and ionic hydrogen fluxes to plasma facing components. A brief overview of permeation probes is given. The range of measurable H fluxes is from 10(16) to more than 10(20) H m(-2)s(-1). Time response of the permeation probe is similar to 0.1-0.5 s. A method to address disadvantages of permeation probes is proposed. This includes an introduction of a preparation chamber for Ar-plasma cleaning of the membrane and absolute calibration with a visible spectroscopy. The hydrogen recombination coefficient, evaluated in such calibration, is k(u) = 5.9 x 10(-30) m(4)s(-1), which agrees well with previous research.
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页数：5
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