Rapid Communications
The Configuration Dependence of Ripple Transport in LHD
2005 年 81 巻 2 号 p. 83-84
詳細
2005 年 81 巻 2 号 p. 83-84
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.
