An analytical erosion model for divertor plates and limiter experiments in CHS

A. Sagara, N. Noda, R. Akiyama, H. Arimoto, H. Idei, H. Iguchi, O. Kaneko, T. Kohmoto, S. Kubo, N. Matsunami, K. Matsuoka, S. Morita, O. Motojima, K. Nishimura, S. Okamura, J. Rice, T. Shoji, C. Takahasi, Y. Takita, M. UedaH. Yamada, I. Yamada

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A self-consistent analytical solution for net erosion of a divertor plate which is set perpendicular to magnetic field lines is presented. The primary flux profile of hydrogen and impurities except redepositing particles is externally given as well as the return ratio of sputtered atoms to the plate. In the direction along the divertor trace, all conditions are uniform. The ionization mean free path is assumed constant to simplify equations. The analytical solution is compared with net erosion experiments carried out in compact helical system (CHS) by exposing a graphite target to a neutral beam heated plasma column introduced perpendicularly to the target along the magnetic field lines through a 2 cm slit opened on a graphite limiter. After exposure to 98 discharges, the target surface is analyzed with Rutherford backscattering method. Deposition profiles of Ti and O impurities are very well explained with the analytical predictions.

Original languageEnglish
Pages (from-to)271-275
Number of pages5
JournalJournal of Nuclear Materials
Volume196-198
Issue numberC
DOIs
Publication statusPublished - Dec 1 1992
Externally publishedYes

Fingerprint

Graphite
Limiters
erosion
Fusion reactor divertors
Erosion
Impurities
Magnetic fields
Rutherford backscattering spectroscopy
graphite
Ionization
Hydrogen
impurities
Experiments
neutral beams
Fluxes
profiles
Plasmas
magnetic fields
mean free path
Atoms

All Science Journal Classification (ASJC) codes

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

Cite this

Sagara, A., Noda, N., Akiyama, R., Arimoto, H., Idei, H., Iguchi, H., ... Yamada, I. (1992). An analytical erosion model for divertor plates and limiter experiments in CHS. Journal of Nuclear Materials, 196-198(C), 271-275. https://doi.org/10.1016/S0022-3115(06)80044-9

An analytical erosion model for divertor plates and limiter experiments in CHS. / Sagara, A.; Noda, N.; Akiyama, R.; Arimoto, H.; Idei, H.; Iguchi, H.; Kaneko, O.; Kohmoto, T.; Kubo, S.; Matsunami, N.; Matsuoka, K.; Morita, S.; Motojima, O.; Nishimura, K.; Okamura, S.; Rice, J.; Shoji, T.; Takahasi, C.; Takita, Y.; Ueda, M.; Yamada, H.; Yamada, I.

In: Journal of Nuclear Materials, Vol. 196-198, No. C, 01.12.1992, p. 271-275.

Research output: Contribution to journalArticle

Sagara, A, Noda, N, Akiyama, R, Arimoto, H, Idei, H, Iguchi, H, Kaneko, O, Kohmoto, T, Kubo, S, Matsunami, N, Matsuoka, K, Morita, S, Motojima, O, Nishimura, K, Okamura, S, Rice, J, Shoji, T, Takahasi, C, Takita, Y, Ueda, M, Yamada, H & Yamada, I 1992, 'An analytical erosion model for divertor plates and limiter experiments in CHS', Journal of Nuclear Materials, vol. 196-198, no. C, pp. 271-275. https://doi.org/10.1016/S0022-3115(06)80044-9
Sagara, A. ; Noda, N. ; Akiyama, R. ; Arimoto, H. ; Idei, H. ; Iguchi, H. ; Kaneko, O. ; Kohmoto, T. ; Kubo, S. ; Matsunami, N. ; Matsuoka, K. ; Morita, S. ; Motojima, O. ; Nishimura, K. ; Okamura, S. ; Rice, J. ; Shoji, T. ; Takahasi, C. ; Takita, Y. ; Ueda, M. ; Yamada, H. ; Yamada, I. / An analytical erosion model for divertor plates and limiter experiments in CHS. In: Journal of Nuclear Materials. 1992 ; Vol. 196-198, No. C. pp. 271-275.
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AU - Sagara, A.

AU - Noda, N.

AU - Akiyama, R.

AU - Arimoto, H.

AU - Idei, H.

AU - Iguchi, H.

AU - Kaneko, O.

AU - Kohmoto, T.

AU - Kubo, S.

AU - Matsunami, N.

AU - Matsuoka, K.

AU - Morita, S.

AU - Motojima, O.

AU - Nishimura, K.

AU - Okamura, S.

AU - Rice, J.

AU - Shoji, T.

AU - Takahasi, C.

AU - Takita, Y.

AU - Ueda, M.

AU - Yamada, H.

AU - Yamada, I.

PY - 1992/12/1

Y1 - 1992/12/1

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