Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST

Sanjeev K. Sharma; Hideki Zushi; Ikuji Takagi; Yuki Hisano; Mizuki Sakamoto; Yuta Higashizono; Taichi Shikama; Sigeru Morita; Tetsuo Tanabe; Naoaki Yoshida; Kazuaki Hanada; Makoto Hasegawa; Osamu Mitarai; Kazuo Nakamura; Hiroshi Idei; Kohnosuke N. Sato; Shoji Kawasaki; Hisatoshi Nakashima; Aki Higashijima; Yousuke Nakashima; Nobuyuki Nishino; Yuji Hatano; Akira Sagara; Yukio Nakamura; Naoko Ashikawa; Takashi Maekawa; Yasuaki Kishimoto; Yuichi Takase

doi:10.1016/j.fusengdes.2010.08.032

Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST

Sanjeev K. Sharma, Hideki Zushi, Ikuji Takagi, Yuki Hisano, Mizuki Sakamoto, Yuta Higashizono, Taichi Shikama, Sigeru Morita, Tetsuo Tanabe, Naoaki Yoshida, Kazuaki Hanada, Makoto Hasegawa, Osamu Mitarai, Kazuo Nakamura, Hiroshi Idei, Kohnosuke N. Sato, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima, Yousuke NakashimaNobuyuki Nishino, Yuji Hatano, Akira Sagara, Yukio Nakamura, Naoko Ashikawa, Takashi Maekawa, Yasuaki Kishimoto, Yuichi Takase

Hydrogen Isotope Research Center, Organization for Promotion of Research

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Particle retention and recycling in plasma fusion devices are generally associated with the diffusion of atomic hydrogen into the materials. The resulted permeation of atomic hydrogen is known as plasma driven permeation (PDP). This permeation may also be significant, even in the walls, which are not directly exposed to the plasma. Under similar conditions, the permeation flux (Γ_perm) of hydrogen through a 30 μm thick Ni membrane heated at 412-575 K has been measured in the spherical tokamak QUEST. Γ_perm is being measured during the scans of different operating parameters like RF power (P_RF), chamber pressure (P _chamber), discharge widths (τ_dis) and vertical magnetic field (B_Z). Simultaneously edge plasma density and spectral intensities of atomic (Balmer) lines and molecular (Fulcher) bands have been compared with the permeation measurements. A linear relationship has been established between the time integrated Γ_perm i.e. permeation fluence (Q_perm) and the time integrated H_α intensity i.e. H_α fluence (Q_α). Q_perm also shows a strong relationship with the edge plasma density and various spectral fluences. The obtained results are discussed for exploring the applicability of the permeation probes in measuring the atomic flux near the first walls.

Original language	English
Pages (from-to)	950-955
Number of pages	6
Journal	Fusion Engineering and Design
Volume	85
Issue number	6
DOIs	https://doi.org/10.1016/j.fusengdes.2010.08.032
State	Published - 2010/11

Keywords

Atomic diffusion
PWI
Plasma driven permeation
Recycling
Retention

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
General Materials Science
Mechanical Engineering

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10.1016/j.fusengdes.2010.08.032

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Sharma, S. K., Zushi, H., Takagi, I., Hisano, Y., Sakamoto, M., Higashizono, Y., Shikama, T., Morita, S., Tanabe, T., Yoshida, N., Hanada, K., Hasegawa, M., Mitarai, O., Nakamura, K., Idei, H., Sato, K. N., Kawasaki, S., Nakashima, H., Higashijima, A., ... Takase, Y. (2010). Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST. Fusion Engineering and Design, 85(6), 950-955. https://doi.org/10.1016/j.fusengdes.2010.08.032

@article{33fc2570b2024f35bb2a198d42062b94,

title = "Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST",

abstract = "Particle retention and recycling in plasma fusion devices are generally associated with the diffusion of atomic hydrogen into the materials. The resulted permeation of atomic hydrogen is known as plasma driven permeation (PDP). This permeation may also be significant, even in the walls, which are not directly exposed to the plasma. Under similar conditions, the permeation flux (Γperm) of hydrogen through a 30 μm thick Ni membrane heated at 412-575 K has been measured in the spherical tokamak QUEST. Γperm is being measured during the scans of different operating parameters like RF power (PRF), chamber pressure (P chamber), discharge widths (τdis) and vertical magnetic field (BZ). Simultaneously edge plasma density and spectral intensities of atomic (Balmer) lines and molecular (Fulcher) bands have been compared with the permeation measurements. A linear relationship has been established between the time integrated Γperm i.e. permeation fluence (Qperm) and the time integrated Hα intensity i.e. Hα fluence (Qα). Qperm also shows a strong relationship with the edge plasma density and various spectral fluences. The obtained results are discussed for exploring the applicability of the permeation probes in measuring the atomic flux near the first walls.",

keywords = "Atomic diffusion, PWI, Plasma driven permeation, Recycling, Retention",

author = "Sharma, {Sanjeev K.} and Hideki Zushi and Ikuji Takagi and Yuki Hisano and Mizuki Sakamoto and Yuta Higashizono and Taichi Shikama and Sigeru Morita and Tetsuo Tanabe and Naoaki Yoshida and Kazuaki Hanada and Makoto Hasegawa and Osamu Mitarai and Kazuo Nakamura and Hiroshi Idei and Sato, {Kohnosuke N.} and Shoji Kawasaki and Hisatoshi Nakashima and Aki Higashijima and Yousuke Nakashima and Nobuyuki Nishino and Yuji Hatano and Akira Sagara and Yukio Nakamura and Naoko Ashikawa and Takashi Maekawa and Yasuaki Kishimoto and Yuichi Takase",

year = "2010",

month = nov,

doi = "10.1016/j.fusengdes.2010.08.032",

language = "英語",

volume = "85",

pages = "950--955",

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Sharma, SK, Zushi, H, Takagi, I, Hisano, Y, Sakamoto, M, Higashizono, Y, Shikama, T, Morita, S, Tanabe, T, Yoshida, N, Hanada, K, Hasegawa, M, Mitarai, O, Nakamura, K, Idei, H, Sato, KN, Kawasaki, S, Nakashima, H, Higashijima, A, Nakashima, Y, Nishino, N, Hatano, Y, Sagara, A, Nakamura, Y, Ashikawa, N, Maekawa, T, Kishimoto, Y & Takase, Y 2010, 'Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST', Fusion Engineering and Design, vol. 85, no. 6, pp. 950-955. https://doi.org/10.1016/j.fusengdes.2010.08.032

TY - JOUR

T1 - Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST

AU - Sharma, Sanjeev K.

AU - Zushi, Hideki

AU - Takagi, Ikuji

AU - Hisano, Yuki

AU - Sakamoto, Mizuki

AU - Higashizono, Yuta

AU - Shikama, Taichi

AU - Morita, Sigeru

AU - Tanabe, Tetsuo

AU - Yoshida, Naoaki

AU - Hanada, Kazuaki

AU - Hasegawa, Makoto

AU - Mitarai, Osamu

AU - Nakamura, Kazuo

AU - Idei, Hiroshi

AU - Sato, Kohnosuke N.

AU - Kawasaki, Shoji

AU - Nakashima, Hisatoshi

AU - Higashijima, Aki

AU - Nakashima, Yousuke

AU - Nishino, Nobuyuki

AU - Hatano, Yuji

AU - Sagara, Akira

AU - Nakamura, Yukio

AU - Ashikawa, Naoko

AU - Maekawa, Takashi

AU - Kishimoto, Yasuaki

AU - Takase, Yuichi

PY - 2010/11

Y1 - 2010/11

N2 - Particle retention and recycling in plasma fusion devices are generally associated with the diffusion of atomic hydrogen into the materials. The resulted permeation of atomic hydrogen is known as plasma driven permeation (PDP). This permeation may also be significant, even in the walls, which are not directly exposed to the plasma. Under similar conditions, the permeation flux (Γperm) of hydrogen through a 30 μm thick Ni membrane heated at 412-575 K has been measured in the spherical tokamak QUEST. Γperm is being measured during the scans of different operating parameters like RF power (PRF), chamber pressure (P chamber), discharge widths (τdis) and vertical magnetic field (BZ). Simultaneously edge plasma density and spectral intensities of atomic (Balmer) lines and molecular (Fulcher) bands have been compared with the permeation measurements. A linear relationship has been established between the time integrated Γperm i.e. permeation fluence (Qperm) and the time integrated Hα intensity i.e. Hα fluence (Qα). Qperm also shows a strong relationship with the edge plasma density and various spectral fluences. The obtained results are discussed for exploring the applicability of the permeation probes in measuring the atomic flux near the first walls.

AB - Particle retention and recycling in plasma fusion devices are generally associated with the diffusion of atomic hydrogen into the materials. The resulted permeation of atomic hydrogen is known as plasma driven permeation (PDP). This permeation may also be significant, even in the walls, which are not directly exposed to the plasma. Under similar conditions, the permeation flux (Γperm) of hydrogen through a 30 μm thick Ni membrane heated at 412-575 K has been measured in the spherical tokamak QUEST. Γperm is being measured during the scans of different operating parameters like RF power (PRF), chamber pressure (P chamber), discharge widths (τdis) and vertical magnetic field (BZ). Simultaneously edge plasma density and spectral intensities of atomic (Balmer) lines and molecular (Fulcher) bands have been compared with the permeation measurements. A linear relationship has been established between the time integrated Γperm i.e. permeation fluence (Qperm) and the time integrated Hα intensity i.e. Hα fluence (Qα). Qperm also shows a strong relationship with the edge plasma density and various spectral fluences. The obtained results are discussed for exploring the applicability of the permeation probes in measuring the atomic flux near the first walls.

KW - Atomic diffusion

KW - PWI

KW - Plasma driven permeation

KW - Recycling

KW - Retention

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U2 - 10.1016/j.fusengdes.2010.08.032

DO - 10.1016/j.fusengdes.2010.08.032

M3 - 学術論文

AN - SCOPUS:78649514868

SN - 0920-3796

VL - 85

SP - 950

EP - 955

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

IS - 6

ER -

Measurement of hydrogen permeation due to atomic flux using permeation probe in the spherical tokamak QUEST

Abstract

Keywords

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