Formation of Low Aspect Ratio Torus Equilibria by ECH in the LATE Device

摘要

By ECH under a steady B_v field,a closed field equilibrium of a low aspect ratio aslow as R/a=1.4 is spontaneously formed in the LATE device.After the spontaneous formation,the plasma current has increased further up to I_P=7.2 kA by 2.45 GHz,30 kW and I_P=11 kA by 5 GHz,120 kW,by increasing the microwave power with a slow ramp of B_v for theequilibrium of the plasma loop at larger currents.Both amount to 12% of the total toroidal coilcurrent.ECH/ECCD at 2ud harmonic resonance of EBW supports the plasma.An outline of thetheoretical considerations for the formation process is presented.