T.-S.F. Wang

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The Cygnus radiographic machine is a relatively compact low-energy (<3 MV) X-ray source with some extremely desirable features for radiographic applications. These features include small spot size, which is critical for high-spatial resolution, and high dose in a low-energy range. The X-ray source is based on bremsstrahlung production in a small-diameter(More)
A method is presented for calculating the wake potential of a bunched beam of arbitrary charge distribution, directly from the wake potential of a shorter bunch, by using orthogonal polynomial expansions. Combined with the table-look-up technique, this method leads to an effective computation scheme for repetitive evaluation of wake potentials of different(More)
Radiographic chain model is used to self-consistently model the diode with a two-dimensional particle-in-cell code (Merlin) which links to an electron-photon Monte Carlo transport code (MCNP) and obtain the spectrum under three different situations. These are: steady state spectrum using a voltage pulse of 2.5 MV; time integrated spectrum using an(More)
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