Abstract
Powerful ECR heating of a mirror-trapped plasma leads to formation of an anisotropic electron velocity distribution function (EDF): the average energy of the transverse, with respect to the magnetic field, electron motion is much greater than the energy of longitudinal motion. Theoretical studies of a mirror magnetic confinement of a multicomponent plasma with anisotropic EDF in a simple mirror trap reveals an essential augmentation in multicharged ion confinement time due to the EDF anisotropy. Consequently, the EDF anisotropy improves the ion charge state distribution (CSD). In this paper we discuss results of experimental investigation of an ECR discharge sustained by powerful pulse microwave radiation of a gyrotron in a mirror magnetic trap. In particular, data on plasma X-ray emission spectrum and on ion CSD are presented. Formation of the ion CSD has been explored both experimentally and numerically.
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