We have simulated the spectra of x-ray lines and continumm
arising from electron impact on solid targets, using simple model
to describe electron transport, x-ray line and continuum emissivities, and
radiative transport through the target. We have found that this
relatively simple model can produce surprisingly good fidelity (within
factors of 
) with the models of Pella et al.
[2] and
and with observed x-ray spectra from electron-impact sources. Work is
currently underway to include additional physics ( e.g.,\
more realistic
electron transport via a Boltzmann-equation description and nonisotropic
bremsstrahlung) to provide reliable tool to predict x-ray source spectra.