Reduced divertor heat loads, plasma shape effects, and radial electric field structures in JFT-2M HRS H-mode plasmas

K. Kamiya, H. Kawashima, T. Ido, N. Oyama, M. Bakhtiari, S. Kasai, Y. Kusama, Y. Miura, H. Ogawa, K. Tsuzuki, K. Uehara

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A key feature of the 'high recycling steady' (HRS) H-mode regimes is the reduction of the transient heat load to the divertor target due to large ELMs. The heat flux to the divertor targets measured by means of a Langmuir probe in the scrape-off layer on the target plate is about ∼0.3 MW m-2 in the typical HRS plasmas, which is very small in comparison with the transient heat load in the ELMy H-mode discharge. In addition, the effects of the plasma shaping on the access to and improved plasma performance of HRS H-mode regimes have been investigated. Furthermore, simultaneous measurements of both density fluctuations and potential profiles at the plasma edge region using a heavy ion beam probe are also presented.

Original languageEnglish
Pages (from-to)272-276
Number of pages5
JournalNuclear Fusion
Volume46
Issue number2
DOIs
Publication statusPublished - Feb 1 2006
Externally publishedYes

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recycling
heat
electric fields
electrostatic probes
heat flux
heavy ions
ion beams
probes
profiles

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Reduced divertor heat loads, plasma shape effects, and radial electric field structures in JFT-2M HRS H-mode plasmas. / Kamiya, K.; Kawashima, H.; Ido, T.; Oyama, N.; Bakhtiari, M.; Kasai, S.; Kusama, Y.; Miura, Y.; Ogawa, H.; Tsuzuki, K.; Uehara, K.

In: Nuclear Fusion, Vol. 46, No. 2, 01.02.2006, p. 272-276.

Research output: Contribution to journalArticle

Kamiya, K, Kawashima, H, Ido, T, Oyama, N, Bakhtiari, M, Kasai, S, Kusama, Y, Miura, Y, Ogawa, H, Tsuzuki, K & Uehara, K 2006, 'Reduced divertor heat loads, plasma shape effects, and radial electric field structures in JFT-2M HRS H-mode plasmas', Nuclear Fusion, vol. 46, no. 2, pp. 272-276. https://doi.org/10.1088/0029-5515/46/2/010
Kamiya, K. ; Kawashima, H. ; Ido, T. ; Oyama, N. ; Bakhtiari, M. ; Kasai, S. ; Kusama, Y. ; Miura, Y. ; Ogawa, H. ; Tsuzuki, K. ; Uehara, K. / Reduced divertor heat loads, plasma shape effects, and radial electric field structures in JFT-2M HRS H-mode plasmas. In: Nuclear Fusion. 2006 ; Vol. 46, No. 2. pp. 272-276.
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AU - Kawashima, H.

AU - Ido, T.

AU - Oyama, N.

AU - Bakhtiari, M.

AU - Kasai, S.

AU - Kusama, Y.

AU - Miura, Y.

AU - Ogawa, H.

AU - Tsuzuki, K.

AU - Uehara, K.

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