STUDY OF DISCHARGE CHANNEL EROSION IN MULTI MODE ANODE LAYER THRUSTER

Accelerated erosion tests of multi-mode D-80 anode layer thruster were carried out in three different modes. Tested modes differed from each other by using of one- or two-stage scheme where low or high summary voltage applied. Experimental data of erosion rate relation to a variation of summary voltage applied and at approximately same input power were obtained. With the help of consideration of simplified theoretical model of ion flux distribution in discharge channel, the thruster operating parameters influence on erosion characteristics was analyzed.