Neoclassical transport in KOLER trap (Yamator)

Abstract

The new stellarator type magnetic system having a high magnetic well value was proposed in paper [1]. In the present work neoclassical transport for magnetic configuration of l = 2 variant of similar system is investigated by numerical methods. A so-called 1/ ν transport regime, in which the transport coefficients are increased with reduction of particle collision frequency ν is considered. For calculating of transport coefficients a technique [2], based on integration along magnetic field lines in given stellarator magnetic field with taking into account particles trapped not only within one magnetic field period but also within several magnetic field periods is used. The obtained transport coefficients are presented in a standard form containing a factor depending on the magnetic field geometry. The dependence of transport coefficients from value of a resulting vertical magnetic field is analysed.