Spatial distribution of atomic and ion hydrogen flux and its effect on hydrogen recycling in long duration confined and non-confined plasmas

A. Kuzmin; H. Zushi; I. Takagi; S.K. Sharma; M. Kobayashi; Y. Hirooka; T. Onchi; K. Hanada; N. Yoshida; K. Nakamura; A. Fujisawa; H. Idei; Y. Nagashima; M. Hasegawa; T. Mutoh; K. Mishra; H. Ohwada

Nuclear Materials and Energy (Aug 2017)

Spatial distribution of atomic and ion hydrogen flux and its effect on hydrogen recycling in long duration confined and non-confined plasmas

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

Affiliations

A. Kuzmin: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan; Corresponding author.
H. Zushi: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
I. Takagi: Department of Nuclear Engineering, Kyoto University, Kyoto, 615-8540, Japan
S.K. Sharma: Institute for Plasma Research, Ahmadabad, India
M. Kobayashi: National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
Y. Hirooka: National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
T. Onchi: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
K. Hanada: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
N. Yoshida: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
K. Nakamura: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
A. Fujisawa: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
H. Idei: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
Y. Nagashima: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
M. Hasegawa: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
T. Mutoh: National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
K. Mishra: RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
H. Ohwada: IGSES, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan

Journal volume & issue: Vol. 12
pp. 627 – 632

Abstract

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In order to understand the atomic hydrogen distribution in different kinds of plasma and its influence on the recycling, two kinds of plasmas were used: non-confined annular electron cyclotron resonance (ECR) and confined long duration plasmas. The permeation probes are used to measure directly the atomic hydrogen flux at several poloidal positions. The permeation through metals due to the ion and atom component of the hydrogen flux to the wall is indistinguishable. To estimate the contribution of the ions directly, Langmuir probes were used. The Гinc profile behind the plasma facing components (PFCs) is almost constant, ∼2 ×1018 H/s/m2.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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