PLASMA EXPANDER Russian patent published in 1994 - IPC

FIELD: acceleration equipment. SUBSTANCE: plasma expander has chamber, diaphragm on side of plasma inlet, at least two insulated electrodes in the form of grids placed perpendicular to symmetry axis of chamber. Each electrode is coupled to chamber body through resistance R_i where i is serial number of electrode on side of plasma inlet. Adjacent electrodes are interconnected through resistance r_i and capacitances C_i linked in series. Values of R_i, r_i and C_i are interrelated by inequality C-i

¹<10⁴·r_i<10³R_i. Values of resistances R_i are chosen in agreement with dependence , where N is number of electrodes. EFFECT: improved homogeneity and stability of emission surface of expander. 2 cl, 1 dwg