Abstract
This paper presents the design and development of a 75 kV, 55 A, 2 nanosecond duration, ⩽ 850 ps rise time, single shot,intense ( ⩾ 100 A/cm2) electron beam source and also themeasurement technique adopted in sub-nanosecond regime. A 200 kV (nanosecondpulse) coaxial pulse forming line (PFL) based pulser is designed to drive acold cathode explosive emission electron gun. The electron gun diodeconsists with a planer graphite cathode, which has the emission area of 8 mmdiameter and a SS 304L anode mesh. Vacuum is achieved of the order of 3.5e-5 mbar by using a diffusion pump, backed by rotary pump. At the diagnosticside for diode voltage measurement a fast response copper sulphate aqueoussolution resistive voltage divider is designed and implemented. For the beamcurrent diagnostic a graphite Faraday cup is designed with taking care ofresponse time in GHz (1.0–3.0 GHz) regime. The circuit diagram, voltage andcurrent waveforms and the experimental setup is presented.
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