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

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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

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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    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, 46(2), 272-276. https://doi.org/10.1088/0029-5515/46/2/010