Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device

Y. Nakashima; H. Takeda; K. Ichimura; K. Hosoi; K. Oki; M. Sakamoto; M. Hirata; M. Ichimura; R. Ikezoe; T. Imai; M. Iwamoto; Y. Hosoda; I. Katanuma; T. Kariya; S. Kigure; J. Kohagura; R. Minami; T. Numakura; S. Takahashi; M. Yoshikawa; N. Asakura; M. Fukumoto; A. Hatayama; Y. Hirooka; S. Kado; H. Kubo; S. Masuzaki; H. Matsuura; S. Nagata; N. Nishino; N. Ohno; A. Sagara; T. Shikama; M. Shoji; A. Tonegawa; Y. Ueda

doi:10.1016/j.jnucmat.2014.12.063

Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device

Y. Nakashima, H. Takeda, K. Ichimura, K. Hosoi, K. Oki, M. Sakamoto, M. Hirata, M. Ichimura, R. Ikezoe, T. Imai, M. Iwamoto, Y. Hosoda, I. Katanuma, T. Kariya, S. Kigure, J. Kohagura, R. Minami, T. Numakura, S. Takahashi, M. YoshikawaN. Asakura, M. Fukumoto, A. Hatayama, Y. Hirooka, S. Kado, H. Kubo, S. Masuzaki, H. Matsuura, S. Nagata, N. Nishino, N. Ohno, A. Sagara, T. Shikama, M. Shoji, A. Tonegawa, Y. Ueda

Department of Applied Physics and Physico-Informatics

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

18 Citations (Scopus)

Abstract

Abstract This paper describes the results of the experiments performed on Tandem Mirror device GAMMA 10/PDX mainly using a new "divertor simulation experimental module (D-module)" installed on one of the end mirror exits which is specially designed to investigate the physics of plasma detachment. The additional ICRF heating in the anchor-cells, connected to both ends of the central-cell, significantly increases the density in the both cells, which attained the generation of the highest particle flux up to 10²³ particles/s m² at the end-mirror exit. H₂ and noble gas injection to enhance the radiation cooling in D-module was performed and a remarkable reduction of the electron temperature (from few tens eV to <3 eV) on the target plate were successfully achieved associated with the strong reduction of particle and heat flux. A significant effect of simultaneous injection with hydrogen and noble gases for detached plasma formation was recognized for the first time.

Original language	English
Article number	48794
Pages (from-to)	537-540
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.12.063
Publication status	Published - 2015 Jul 22

ASJC Scopus subject areas

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

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10.1016/j.jnucmat.2014.12.063

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Nakashima, Y., Takeda, H., Ichimura, K., Hosoi, K., Oki, K., Sakamoto, M., Hirata, M., Ichimura, M., Ikezoe, R., Imai, T., Iwamoto, M., Hosoda, Y., Katanuma, I., Kariya, T., Kigure, S., Kohagura, J., Minami, R., Numakura, T., Takahashi, S., ... Ueda, Y. (2015). Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device. Journal of Nuclear Materials, 463, 537-540. [48794]. https://doi.org/10.1016/j.jnucmat.2014.12.063

Nakashima, Y, Takeda, H, Ichimura, K, Hosoi, K, Oki, K, Sakamoto, M, Hirata, M, Ichimura, M, Ikezoe, R, Imai, T, Iwamoto, M, Hosoda, Y, Katanuma, I, Kariya, T, Kigure, S, Kohagura, J, Minami, R, Numakura, T, Takahashi, S, Yoshikawa, M, Asakura, N, Fukumoto, M, Hatayama, A, Hirooka, Y, Kado, S, Kubo, H, Masuzaki, S, Matsuura, H, Nagata, S, Nishino, N, Ohno, N, Sagara, A, Shikama, T, Shoji, M, Tonegawa, A & Ueda, Y 2015, 'Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device', Journal of Nuclear Materials, vol. 463, 48794, pp. 537-540. https://doi.org/10.1016/j.jnucmat.2014.12.063

@article{b01627a8c2f94abca65617ef22f44a91,

title = "Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device",

abstract = "Abstract This paper describes the results of the experiments performed on Tandem Mirror device GAMMA 10/PDX mainly using a new {"}divertor simulation experimental module (D-module){"} installed on one of the end mirror exits which is specially designed to investigate the physics of plasma detachment. The additional ICRF heating in the anchor-cells, connected to both ends of the central-cell, significantly increases the density in the both cells, which attained the generation of the highest particle flux up to 1023 particles/s m2 at the end-mirror exit. H2 and noble gas injection to enhance the radiation cooling in D-module was performed and a remarkable reduction of the electron temperature (from few tens eV to <3 eV) on the target plate were successfully achieved associated with the strong reduction of particle and heat flux. A significant effect of simultaneous injection with hydrogen and noble gases for detached plasma formation was recognized for the first time.",

author = "Y. Nakashima and H. Takeda and K. Ichimura and K. Hosoi and K. Oki and M. Sakamoto and M. Hirata and M. Ichimura and R. Ikezoe and T. Imai and M. Iwamoto and Y. Hosoda and I. Katanuma and T. Kariya and S. Kigure and J. Kohagura and R. Minami and T. Numakura and S. Takahashi and M. Yoshikawa and N. Asakura and M. Fukumoto and A. Hatayama and Y. Hirooka and S. Kado and H. Kubo and S. Masuzaki and H. Matsuura and S. Nagata and N. Nishino and N. Ohno and A. Sagara and T. Shikama and M. Shoji and A. Tonegawa and Y. Ueda",

note = "Funding Information: The authors would like to acknowledge the members of the GAMMA 10 group, University of Tsukuba for their collaboration in the experiments. This work was performed with the support by the bi-directional Collaboration Research Programs (NIFS12KUGM037 and NIFS14KUGM086) and grant-in-aid for Scientific Research from Ministry of Education, Science, Sports and Culture of Japan (24360378). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.jnucmat.2014.12.063",

language = "English",

volume = "463",

pages = "537--540",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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TY - JOUR

T1 - Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device

AU - Nakashima, Y.

AU - Takeda, H.

AU - Ichimura, K.

AU - Hosoi, K.

AU - Oki, K.

AU - Sakamoto, M.

AU - Hirata, M.

AU - Ichimura, M.

AU - Ikezoe, R.

AU - Imai, T.

AU - Iwamoto, M.

AU - Hosoda, Y.

AU - Katanuma, I.

AU - Kariya, T.

AU - Kigure, S.

AU - Kohagura, J.

AU - Minami, R.

AU - Numakura, T.

AU - Takahashi, S.

AU - Yoshikawa, M.

AU - Asakura, N.

AU - Fukumoto, M.

AU - Hatayama, A.

AU - Hirooka, Y.

AU - Kado, S.

AU - Kubo, H.

AU - Masuzaki, S.

AU - Matsuura, H.

AU - Nagata, S.

AU - Nishino, N.

AU - Ohno, N.

AU - Sagara, A.

AU - Shikama, T.

AU - Shoji, M.

AU - Tonegawa, A.

AU - Ueda, Y.

N1 - Funding Information: The authors would like to acknowledge the members of the GAMMA 10 group, University of Tsukuba for their collaboration in the experiments. This work was performed with the support by the bi-directional Collaboration Research Programs (NIFS12KUGM037 and NIFS14KUGM086) and grant-in-aid for Scientific Research from Ministry of Education, Science, Sports and Culture of Japan (24360378). Publisher Copyright: © 2014 Elsevier B.V.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract This paper describes the results of the experiments performed on Tandem Mirror device GAMMA 10/PDX mainly using a new "divertor simulation experimental module (D-module)" installed on one of the end mirror exits which is specially designed to investigate the physics of plasma detachment. The additional ICRF heating in the anchor-cells, connected to both ends of the central-cell, significantly increases the density in the both cells, which attained the generation of the highest particle flux up to 1023 particles/s m2 at the end-mirror exit. H2 and noble gas injection to enhance the radiation cooling in D-module was performed and a remarkable reduction of the electron temperature (from few tens eV to <3 eV) on the target plate were successfully achieved associated with the strong reduction of particle and heat flux. A significant effect of simultaneous injection with hydrogen and noble gases for detached plasma formation was recognized for the first time.

AB - Abstract This paper describes the results of the experiments performed on Tandem Mirror device GAMMA 10/PDX mainly using a new "divertor simulation experimental module (D-module)" installed on one of the end mirror exits which is specially designed to investigate the physics of plasma detachment. The additional ICRF heating in the anchor-cells, connected to both ends of the central-cell, significantly increases the density in the both cells, which attained the generation of the highest particle flux up to 1023 particles/s m2 at the end-mirror exit. H2 and noble gas injection to enhance the radiation cooling in D-module was performed and a remarkable reduction of the electron temperature (from few tens eV to <3 eV) on the target plate were successfully achieved associated with the strong reduction of particle and heat flux. A significant effect of simultaneous injection with hydrogen and noble gases for detached plasma formation was recognized for the first time.

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U2 - 10.1016/j.jnucmat.2014.12.063

DO - 10.1016/j.jnucmat.2014.12.063

M3 - Article

AN - SCOPUS:84937735069

SN - 0022-3115

VL - 463

SP - 537

EP - 540

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48794

ER -

Progress of divertor simulation research toward the realization of detached plasma using a large tandem mirror device

Abstract

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