Measurement of plug potential bounce ion in the tandem mirror GAMMA 10

Abstract

The bounced ion by the plug potential is quite essential in the tandem mirror experiment. In order to directly measure the plug potential (PP) bounce ion, we have constructed the charge exchange bounce ion analyzer located near the inner mirror throat of the plug/barrier cell, by which both energy and pitch angle of the charge exchanged neutral particle caused by the PP bounce ion were simultaneously measured. The PP bounce ion was successfully assigned by selection of the pitch angle and the energy of the bounce ions during plugging. These data are useful for study of the radial diffusion of the bounce ion.