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. Ueda; H. Yamada; I. Yamada

doi:10.1016/S0022-3115(06)80044-9

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 journal › Article › peer-review

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 language	English
Pages (from-to)	271-275
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	196-198
Issue number	C
DOIs	https://doi.org/10.1016/S0022-3115(06)80044-9
Publication status	Published - Dec 1 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/S0022-3115(06)80044-9

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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., ... 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

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

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title = "An analytical erosion model for divertor plates and limiter experiments in CHS",

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.",

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

year = "1992",

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doi = "10.1016/S0022-3115(06)80044-9",

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pages = "271--275",

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T1 - An analytical erosion model for divertor plates and limiter experiments in CHS

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

N2 - 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.

AB - 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.

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M3 - Article

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SN - 0022-3115

VL - 196-198

SP - 271

EP - 275

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - C

ER -

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

Abstract

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