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The paraxial diode is routinely fielded on a number of AWE pulsed-power accelerators to provide a flash X-ray source for use in radiography experiments. In these diodes, a relativistic 30-40 kA electron beam is created in a vacuum diode gap, passed through a thin anode foil, and then transported, in air at 1.1 Torr, to a high-Z metal target, producing Bremsstrahlung radiation. At present, this diode...
Summary form only given. The self magnetic pinch diode is routinely used at AWE as a radiographic source. This diode consists of a hollow cathode and a planar target separated by of order 10mm. The pinching of the electron beam relies on ions being drawn back from the anode thus reducing the self repulsion that the beam would otherwise experience and allowing the self magnetic field of the beam electrons...
Summary form only given. The self magnetic pinch (SMP) diode has been developed from a low voltage (<2 MV) to a high voltage (7-8 MV) radiographic source as part of a program to build a hydrodynamics research facility (Hydrus) at AWE Aldermaston. Development of the initial AWE diode design has used the facilities and assistance of a number of UK and US laboratories and companies to carry out both...
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