ANISOTROPIC HOT PLASMA IN THE GAMMA-10 TANDEM MIRROR WITH MINIMUM-B INBOARD ANCHORS

Physics issues relevant to minimum B mirror configuration that are stu died on the GAMMA 10 tandem mirror are examined. The ion beta created in minimum B mirror cells (anchors) by heating at ICRF (Ion Cyclotron Range of Frequency) provides the interchange-stability of the whole pl asma. The anisotropic velocity distribution created by RF heating bear s an advantage in terms of the macrostability while it can be a source of microscopic instabilities. The anisotropy also affects the fusion reaction rate as evaluated absolutely in terms of deuterium-deuterium (D-D) neutron yield, The 3-dimensional distribution of the hot-ion anc hor plasma is determined with a soft ii-ray pinhole camera. The anchor beta has been increased to 30% with hot electrons that show different spatial distribution depending on heating configurations. Relevance o f the high beta hot electrons is discussed with reference to previous experiments and theories.