“…Cathode erosion raves may be adequately correlated with discharge current level and cathode orifice diameter. (10,12) It was desired to obtain a cathode that exhibited the following: case of starting, low thermal loading due to die.. charge self heating, stability during a high voltage 4ecycle and an acceptable V-I characteristic for discharge currents from 10 to 25 A. Figure 8 illustrates the variation of discharge voltage with discharge chamber magnetic field strength for cathodes with orifice diameters' of 0.75 and 1.52 mm.…”