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

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 additio...

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Bibliographic Details
Published in:	Journal of nuclear materials Vol. 463; pp. 537 - 540
Main Authors:	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.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-08-2015
Subjects:	Cooling Density Detaching Devices Heating Reduction Simulation Tandem mirrors
Online Access:	Get full text
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Summary:	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 1023particles/sm2 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 <3eV) 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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0022-3115 1873-4820
DOI:	10.1016/j.jnucmat.2014.12.063