THE IMPURITY TRANSPORT IN HT-6B TOKAMAK

Abstract

The quasi-stationary profiles of the impurity ionization stages in HT-6B toka-mak were determined by monitoring the VUV (vacuum ultraviolet) and visible line emissions from impurities. An impurity transport code was set up. The impurity transport coefficients and other parameters of impurities in that device were simulated and determined. From the measurement of impurity emission profiles and simulation analysis, it was concluded that the impurity confinement was improved and the impurity recycling was reduced by the slow magnetic compression. Some characteristics of impurity transport in that device were also discussed.