Particle balance in long duration RF driven plasmas on QUEST

Kazuaki Hanada, H. Zushi, N. Yoshida, N. Yugami, T. Honda, Makoto Hasegawa, K. Mishra, A. Kuzmin, K. Nakamura, akihide fujisawa, Hiroshi Idei, Yoshihiko Nagashima, O. Watanabe, Takumi Onchi, Hideo Watanabe, Kazutoshi Tokunaga, A. Higashijima, S. Kawasaki, H. Nakashima, Y. Takase & 3 others A. Fukuyama, O. Mitarai, Y. K.M. Peng

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Abstract Global particle balance in non-inductive long-duration plasma on QUEST has been investigated. Approximately 70% of the fuel hydrogen (H) was retained in the wall and then was almost exhausted just after the discharge. The global recycling ratio (Rg), defined as the ratio of the evacuated H2 flux to that injected, was found to gradually increase during discharges and subsequently rose rapidly. To study the growth of Rg, the thermal desorption spectra after deuterium implantation in a specimen exposed to QUEST plasma was analyzed with a model which includes reflection, diffusion, solution, recombination, trapping, and plasma-induced desorption in the re-deposition layer. The model reconstructs the growth of Rg during a long-duration plasma and indicates solution plays a dominant role in the growth.

Original languageEnglish
Article number48871
Pages (from-to)1084-1086
Number of pages3
JournalJournal of Nuclear Materials
Volume463
DOIs
Publication statusPublished - Jul 22 2015

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Plasmas
desorption
hydrogen fuels
Thermal desorption
Hydrogen fuels
Deuterium
recycling
Recycling
deuterium
Desorption
implantation
trapping
Fluxes
Hydrogen

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Hanada, K., Zushi, H., Yoshida, N., Yugami, N., Honda, T., Hasegawa, M., ... Peng, Y. K. M. (2015). Particle balance in long duration RF driven plasmas on QUEST. Journal of Nuclear Materials, 463, 1084-1086. [48871]. https://doi.org/10.1016/j.jnucmat.2015.01.013

Particle balance in long duration RF driven plasmas on QUEST. / Hanada, Kazuaki; Zushi, H.; Yoshida, N.; Yugami, N.; Honda, T.; Hasegawa, Makoto; Mishra, K.; Kuzmin, A.; Nakamura, K.; fujisawa, akihide; Idei, Hiroshi; Nagashima, Yoshihiko; Watanabe, O.; Onchi, Takumi; Watanabe, Hideo; Tokunaga, Kazutoshi; Higashijima, A.; Kawasaki, S.; Nakashima, H.; Takase, Y.; Fukuyama, A.; Mitarai, O.; Peng, Y. K.M.

In: Journal of Nuclear Materials, Vol. 463, 48871, 22.07.2015, p. 1084-1086.

Research output: Contribution to journalArticle

Hanada, K, Zushi, H, Yoshida, N, Yugami, N, Honda, T, Hasegawa, M, Mishra, K, Kuzmin, A, Nakamura, K, fujisawa, A, Idei, H, Nagashima, Y, Watanabe, O, Onchi, T, Watanabe, H, Tokunaga, K, Higashijima, A, Kawasaki, S, Nakashima, H, Takase, Y, Fukuyama, A, Mitarai, O & Peng, YKM 2015, 'Particle balance in long duration RF driven plasmas on QUEST', Journal of Nuclear Materials, vol. 463, 48871, pp. 1084-1086. https://doi.org/10.1016/j.jnucmat.2015.01.013
Hanada, Kazuaki ; Zushi, H. ; Yoshida, N. ; Yugami, N. ; Honda, T. ; Hasegawa, Makoto ; Mishra, K. ; Kuzmin, A. ; Nakamura, K. ; fujisawa, akihide ; Idei, Hiroshi ; Nagashima, Yoshihiko ; Watanabe, O. ; Onchi, Takumi ; Watanabe, Hideo ; Tokunaga, Kazutoshi ; Higashijima, A. ; Kawasaki, S. ; Nakashima, H. ; Takase, Y. ; Fukuyama, A. ; Mitarai, O. ; Peng, Y. K.M. / Particle balance in long duration RF driven plasmas on QUEST. In: Journal of Nuclear Materials. 2015 ; Vol. 463. pp. 1084-1086.
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abstract = "Abstract Global particle balance in non-inductive long-duration plasma on QUEST has been investigated. Approximately 70{\%} of the fuel hydrogen (H) was retained in the wall and then was almost exhausted just after the discharge. The global recycling ratio (Rg), defined as the ratio of the evacuated H2 flux to that injected, was found to gradually increase during discharges and subsequently rose rapidly. To study the growth of Rg, the thermal desorption spectra after deuterium implantation in a specimen exposed to QUEST plasma was analyzed with a model which includes reflection, diffusion, solution, recombination, trapping, and plasma-induced desorption in the re-deposition layer. The model reconstructs the growth of Rg during a long-duration plasma and indicates solution plays a dominant role in the growth.",
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AU - Hanada, Kazuaki

AU - Zushi, H.

AU - Yoshida, N.

AU - Yugami, N.

AU - Honda, T.

AU - Hasegawa, Makoto

AU - Mishra, K.

AU - Kuzmin, A.

AU - Nakamura, K.

AU - fujisawa, akihide

AU - Idei, Hiroshi

AU - Nagashima, Yoshihiko

AU - Watanabe, O.

AU - Onchi, Takumi

AU - Watanabe, Hideo

AU - Tokunaga, Kazutoshi

AU - Higashijima, A.

AU - Kawasaki, S.

AU - Nakashima, H.

AU - Takase, Y.

AU - Fukuyama, A.

AU - Mitarai, O.

AU - Peng, Y. K.M.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract Global particle balance in non-inductive long-duration plasma on QUEST has been investigated. Approximately 70% of the fuel hydrogen (H) was retained in the wall and then was almost exhausted just after the discharge. The global recycling ratio (Rg), defined as the ratio of the evacuated H2 flux to that injected, was found to gradually increase during discharges and subsequently rose rapidly. To study the growth of Rg, the thermal desorption spectra after deuterium implantation in a specimen exposed to QUEST plasma was analyzed with a model which includes reflection, diffusion, solution, recombination, trapping, and plasma-induced desorption in the re-deposition layer. The model reconstructs the growth of Rg during a long-duration plasma and indicates solution plays a dominant role in the growth.

AB - Abstract Global particle balance in non-inductive long-duration plasma on QUEST has been investigated. Approximately 70% of the fuel hydrogen (H) was retained in the wall and then was almost exhausted just after the discharge. The global recycling ratio (Rg), defined as the ratio of the evacuated H2 flux to that injected, was found to gradually increase during discharges and subsequently rose rapidly. To study the growth of Rg, the thermal desorption spectra after deuterium implantation in a specimen exposed to QUEST plasma was analyzed with a model which includes reflection, diffusion, solution, recombination, trapping, and plasma-induced desorption in the re-deposition layer. The model reconstructs the growth of Rg during a long-duration plasma and indicates solution plays a dominant role in the growth.

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