Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak

the QUEST Experiment Group

doi:10.1016/j.nme.2020.100872

Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak

the QUEST Experiment Group

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

1 Citation (Scopus)

Abstract

To study radial distribution of hydrogen flux in peripheral plasma in long duration tokamak discharges, permeation and Langmuir reciprocate probes are used. The atomic hydrogen flux to the walls at several radial positions is deduced from the permeation flux. Contribution of the ions to the hydrogen flow is deduced from the Langmuir probe ion saturation current. It is found, that the atomic hydrogen has the most contribution to the hydrogen flow behind the plasma facing components (PFCs), while the ion flux there is negligible. The atomic flux behind the PFCs drops to the value of F~4.3×10¹⁵H/m²/s, which is ~6 % of that just in front of PFCs, F~7.7×10¹⁶H/m²/s.

Original language	English
Article number	100872
Journal	Nuclear Materials and Energy
Volume	26
DOIs	https://doi.org/10.1016/j.nme.2020.100872
Publication status	Published - Mar 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science (miscellaneous)
Nuclear and High Energy Physics
Nuclear Energy and Engineering

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10.1016/j.nme.2020.100872

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@article{dc33ae4206854e44b690ef8b09e3fe11,

title = "Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak",

abstract = "To study radial distribution of hydrogen flux in peripheral plasma in long duration tokamak discharges, permeation and Langmuir reciprocate probes are used. The atomic hydrogen flux to the walls at several radial positions is deduced from the permeation flux. Contribution of the ions to the hydrogen flow is deduced from the Langmuir probe ion saturation current. It is found, that the atomic hydrogen has the most contribution to the hydrogen flow behind the plasma facing components (PFCs), while the ion flux there is negligible. The atomic flux behind the PFCs drops to the value of F~4.3×1015H/m2/s, which is ~6 % of that just in front of PFCs, F~7.7×1016H/m2/s.",

author = "{the QUEST Experiment Group} and A. Kuzmin and M. Kobayashi and K. Hanada and H. Idei and T. Onchi and S. Mori and N. Yoneda and T. Shikama and M. Hasuo and T. Ido and Y. Nagashima and R. Ikezoe and M. Hasegawa and K. Kuroda and K. Kono and S. Matsuo and T. Nagata and S. Shimabukuro and A. Higashijima and I. Niiya and H. Zushi",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2021",

month = mar,

doi = "10.1016/j.nme.2020.100872",

language = "English",

volume = "26",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak

AU - the QUEST Experiment Group

AU - Kuzmin, A.

AU - Kobayashi, M.

AU - Hanada, K.

AU - Idei, H.

AU - Onchi, T.

AU - Mori, S.

AU - Yoneda, N.

AU - Shikama, T.

AU - Hasuo, M.

AU - Ido, T.

AU - Nagashima, Y.

AU - Ikezoe, R.

AU - Hasegawa, M.

AU - Kuroda, K.

AU - Kono, K.

AU - Matsuo, S.

AU - Nagata, T.

AU - Shimabukuro, S.

AU - Higashijima, A.

AU - Niiya, I.

AU - Zushi, H.

PY - 2021/3

Y1 - 2021/3

N2 - To study radial distribution of hydrogen flux in peripheral plasma in long duration tokamak discharges, permeation and Langmuir reciprocate probes are used. The atomic hydrogen flux to the walls at several radial positions is deduced from the permeation flux. Contribution of the ions to the hydrogen flow is deduced from the Langmuir probe ion saturation current. It is found, that the atomic hydrogen has the most contribution to the hydrogen flow behind the plasma facing components (PFCs), while the ion flux there is negligible. The atomic flux behind the PFCs drops to the value of F~4.3×1015H/m2/s, which is ~6 % of that just in front of PFCs, F~7.7×1016H/m2/s.

AB - To study radial distribution of hydrogen flux in peripheral plasma in long duration tokamak discharges, permeation and Langmuir reciprocate probes are used. The atomic hydrogen flux to the walls at several radial positions is deduced from the permeation flux. Contribution of the ions to the hydrogen flow is deduced from the Langmuir probe ion saturation current. It is found, that the atomic hydrogen has the most contribution to the hydrogen flow behind the plasma facing components (PFCs), while the ion flux there is negligible. The atomic flux behind the PFCs drops to the value of F~4.3×1015H/m2/s, which is ~6 % of that just in front of PFCs, F~7.7×1016H/m2/s.

UR - http://www.scopus.com/inward/record.url?scp=85098797823&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85098797823&partnerID=8YFLogxK

U2 - 10.1016/j.nme.2020.100872

DO - 10.1016/j.nme.2020.100872

M3 - Article

AN - SCOPUS:85098797823

SN - 2352-1791

VL - 26

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

M1 - 100872

ER -

Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak

Abstract

All Science Journal Classification (ASJC) codes

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