The effects of the radial electric field on the ripple transport in the stellarator/heliotron are studied. The pitch angle dependence of the detrapping frequency is kept and the transport coefficient is calculated for the arbitrary values of Ω E /ν eff (Ω E : E r × B rotation frequency ν eff : effective collision frequency of ripple-trapped particles). A simple interpolation formula is derived and the electron energy confinement time is estimated.
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Itoh et al. (1986) studied this question.
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