OLE AGLIHM ANY AIT x=T IN. Zp = 0.0132 x=71N. Z,, = 0.0019 x= 9 IN. Z,, = 0.0015 CM’/SEC-VOLT x= 11 IN. Z, = 0.0012 Fig. 5—Sample electron micrographs (p = 0.1 atm, E = 240 volts/cm, and Nt = 6.85 * 108 ions/cm? per second).

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