Measurement of thickness of film deposited on the plasma-facing wall in the QUEST tokamak by colorimetry

被引：8

作者：

Wang, Z. ^{[1
]}

Hanada, K. ^{[2
]}

Yoshida, N. ^{[2
]}

Shimoji, T. ^{[1
]}

Miyamoto, M. ^{[3
]}

Oya, Y. ^{[4
]}

Zushi, H. ^{[2
]}

Idei, H. ^{[2
]}

Nakamura, K. ^{[2
]}

Fujisawa, A. ^{[2
]}

Nagashima, Y. ^{[2
]}

Hasegawa, M. ^{[2
]}

Kawasaki, S. ^{[2
]}

Higashijima, A. ^{[2
]}

Nakashima, H. ^{[2
]}

Nagata, T. ^{[2
]}

Kawaguchi, A. ^{[2
]}

Fujiwara, T. ^{[2
]}

Araki, K. ^{[2
]}

Mitarai, O. ^{[5
]}

Fukuyama, A. ^{[6
]}

Takase, Y. ^{[7
]}

Matsumoto, K. ^{[8
]}

机构：

[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan

[2] Kyushu Univ, Res Inst Appl Mech, Kasuga, Fukuoka 8168580, Japan

[3] Shimane Univ, Dept Mat Sci, Matsue, Shimane 6908504, Japan

[4] Shizuoka Univ, Fac Sci, Ohya, Shizuoaka 4228529, Japan

[5] Tokai Univ, Inst Ind Sci & Technol Res, Kumamoto 8628652, Japan

[6] Kyoto Univ, Dept Nucl Engn, Kyoto 6068501, Japan

[7] Univ Tokyo, Grad Sch Frontier Sci, Kashiwa, Chiba 2778561, Japan

[8] Honda Res & Dev Co Ltd, Automobile R&D Ctr, Haga, Tochigi 3213393, Japan

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2017年 / 88卷 / 09期

关键词：

SPHERE;

D O I：

10.1063/1.5000739

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

After several experimental campaigns in the Kyushu University Experiment with Steady-state Spherical Tokamak (QUEST), the originally stainless steel plasma-facing wall (PFW)becomes completely covered with a deposited film composed of mixture materials, such as iron, chromium, carbon, and tungsten. In this work, an innovative colorimetry-based method was developed to measure the thickness of the deposited film on the actual QUEST wall. Because the optical constants of the deposited film on the PFW were position-dependent and the extinction coefficient k(1) was about 1.0-2.0, which made the probing light not penetrate through some thick deposited films, the colorimetry method developed can only provide a rough value range of thickness of the metal-containing film deposited on the actual PFW in QUEST. However, the use of colorimetry is of great benefit to large-area inspections and to radioactive materials in future fusion devices that will be strictly prohibited from being taken out of the limited area. Published by AIP Publishing.

引用

页数：8

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