Generation and extraction of microsecond intense relativistic electron beams

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Abstract
The Physics International Pulserad 1140 has been modified so that a pulse length of 1.7 μsec can be obtained with a beam energy of 50 kJ. This modification involves substituting a pulse-forming network for the conventional Blumlein. This long-pulse generator has been used to study diode behavior on 1-μsec time scales. The dependence of impedance on voltage and anode–cathode spacing is discussed here. A semiempirical model has been developed. The diode time history and closure velocity are discussed in terms of this model.

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