Edge plasma modelling for HT-7 superconducting tokamak experiments

HT-7 is a medium-sized superconducting tokamak with limiter and circular cross section configuration and it has become an important target for modelling of experimental plasmas. SOLPS5.0(B2.5) edge plasma transport code is used for modelling the experimental shots in order to match the code results to the experimental temperature and density profiles by varying the perpendicular particle transport coefficient D and heat conductivities χe, χi in the code until good agreement between the code results and the measured data. For ohmic heated Deuterium plasma shot with toroidal magnetic field Bt = 1.98 T, plasma current Ip = 140 kA, ohmic heating power P = 180 kW, by matching the modelling results to the experimental profiles of electron density and temperature at the orthogonal plane, the perpendicular particle and heat transport coefficients D, χe and χi are obtained from the modelling results in the edge computation region with the assumption of χe = χi.