Journal of Plasma and Fusion Research
Print ISSN : 0918-7928
Rapid Communications
The Configuration Dependence of Ripple Transport in LHD
Masayuki YOKOYAMAKiyomasa WATANABENoriyoshi NAKAJIMA
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2005 Volume 81 Issue 2 Pages 83-84

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Abstract

The GIOTA code [1] has been applied to clarify the configuration dependence of ripple transport properties in LHD. The effective helical ripple (εeff), as a measure of the level of ripple transport, is calculated with a wide range scan of magnetic axis position, (Rax) and plasma beta value (β). Our results show that εeff takes a minimum value in a wide radial portion around the configuration with Rax = 3.53-3.55 m at vacuum. It is also revealed that εeff decreases as β is increased for configurations with Rax of less than the above mentioned range.

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© 2005 by The Japan Society of Plasma Science and Nuclear Fusion Research
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