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(a) Typical front image of light emission from the VEL-BLACK carbon-fiber cathode. (b) Typical x-ray image of the electron beam , frame duration of 50 ns, time delay of 150 ns, and .
Waveforms of the diode voltage and diode current, , VEL-BLACK carbon-fiber cathode. Solid line represents the CsI coated cathode, while the dotted line represents the cathode without CsI coating.
Time dependence of the diode perveance for the case of the VEL-BLACK carbon-fiber cathode with and without CsI coating, , , and .
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