Magnetic field structure preferable to E × B shear flow generation in a quasi-axisymmetric stellarator CHS-qa

C. Suzuki, K. Ida, A. Fujisawa, A. Shimizu, S. Okamura, S. Nishimura, M. Isobe, I. Nomura, K. Matsuoka

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

Viscous damping and effective helical ripple have been quantitatively estimated for a proposed quasi-axisymmetric stellarator CHS-qa configuration. It is predicted that viscous damping against plasma flow in CHS-qa is low enough to sustain large E × B shear as observed in the H-modes and internal transport barriers in many tokamaks. Effective helical ripple in CHS-qa is adjusted to be on the order of 10-2 or lower, which is suitable to trigger transport barriers due to non-ambipolar neoclassical fluxes peculiar to conventional helical devices. For experimental flexibility, viscous damping and effective helical ripple in CHS-qa can be extensively controlled over a range of about one order by modifying modular coil currents.

Original languageEnglish
Pages (from-to)A225-A230
JournalPlasma Physics and Controlled Fusion
Volume44
Issue number5 A
DOIs
Publication statusPublished - May 2002
Externally publishedYes
Event8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers - Toki, Japan
Duration: Sep 5 2001Sep 7 2001

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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