Method of improving cathode surface
2008
The method of operated processing of cathode surface in vacuum has been offered. The control has been realized in steady-state conditions by electric intensity amplification factor beta at cathode micro heterogeneities. High-voltage pulses of nanosecond range at amplitudes providing the breakdown delay time equal to the duration of appurtenant pulse t d = t p have been used as an effect. The method permits to up-grade appreciably the cathode surface with low pulse number. As a result of influence of five pulses with t p = 10 ns at amplitudes providing the equality of t d = t p upon stainless steel electrodes with area of S ap 1 cm 2 the amplification factor has been reduced more than in five times from beta = 136 to beta = 26.
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