TY - JOUR
T1 - Magnetic field structure preferable to E × B shear flow generation in a quasi-axisymmetric stellarator CHS-qa
AU - Suzuki, C.
AU - Ida, K.
AU - Fujisawa, A.
AU - Shimizu, A.
AU - Okamura, S.
AU - Nishimura, S.
AU - Isobe, M.
AU - Nomura, I.
AU - Matsuoka, K.
PY - 2002/5
Y1 - 2002/5
N2 - 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.
AB - 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.
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U2 - 10.1088/0741-3335/44/5A/321
DO - 10.1088/0741-3335/44/5A/321
M3 - Conference article
AN - SCOPUS:0036573408
SN - 0741-3335
VL - 44
SP - A225-A230
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
IS - 5 A
M1 - 321
T2 - 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers
Y2 - 5 September 2001 through 7 September 2001
ER -