Simulation Study for Divertor Geometry and Gas Puffng to Handle Huge Exhaust Power in HL-2M with SOLPS5.0

One of the critical issues to be solved for HL-2M is the power exhaust. Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern, which in turn has a strong effect on the symmetry and stability of the divertor plasma and finally on the whole edge region. The numerical simulation SOLPS5.0 package is used to design and explore the divertor target plates for HL-2M. We start with the choice of a proper target plate geometry, which has a smaller incidence angle in the permissible space, and then discuss the method of gas pu±ng to reduce the heat °ux density on the target and the effects of gas pu±ng on the divertor plasma performance.