Geometric dependence of the energy confinement time scaling for H-mode discharges

Miura Y. Miura, Takizuka T. Takizuka, Tamai H. Tamai, Matsuda T. Matsuda, Suzuki N. Suzuki, Mori M. Mori, Maeda H. Maeda, Itoh K. Itoh, Itoh S.i. Itoh, Kardaun O.j.w.f. Kardaun

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Abstract

The dependence of the H-mode energy confinement time τE on the plasma elongation and the divertor configuration is studied. A regression analysis of the H-mode database is presented in which the dependence on the closed/open divertor configuration, estimated from the ASDEX experiments, is included. The dependence of τE on the elongation factor k is found to be positive (approximately k0.6) for ELM-free H-mode discharges, in accordance with experimental results for ELM-free limiter H-mode plasmas in JFT-2M. In addition, the influence of the X-point configuration (single null or double null) on the confinement time is briefly addressed.

Original languageEnglish
Article numberI15
Pages (from-to)1473-1479
Number of pages7
JournalNuclear Fusion
Volume32
Issue number8
DOIs
Publication statusPublished - 1992

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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    Y. Miura, M., T. Takizuka, T., H. Tamai, T., T. Matsuda, M., N. Suzuki, S., M. Mori, M., H. Maeda, M., K. Itoh, I., S.i. Itoh, I., & O.j.w.f. Kardaun, K. (1992). Geometric dependence of the energy confinement time scaling for H-mode discharges. Nuclear Fusion, 32(8), 1473-1479. [I15]. https://doi.org/10.1088/0029-5515/32/8/I15