H MODE CONFINEMENT IN ALCATOR C-MOD

摘要

A series of experiments, examining the confinement properties of ion cyclotron range of frequencies (ICRF) heated H mode plasmas, has been carried out on the Alcator C-Mod tokamak. Alcator C-Mod is a compact tokamak that operates at high particle, power and current densities at toroidal fields up to 8 T. Under these conditions the plasma is essentially thermal with very little contribution to the stored energy from energetic ions (typically no more than 5/100) and with T_i ～ T_e. Most of the data were taken with the machine in a single null 'closed' divertor configuration with the plasma facing components clad in molybdenum tiles.