Abstract
Spectral distributions are calculated for bremsstrahlung generated at 10, 15, 20, 25, 30, 40 and 50kv in a tungsten target tube having a 1 mm beryllium window, and allowance is made by two methods for attenuation within the target. Differential filtration by the target is shown to give rise to sharp peaks in the distributions which simulate characteristic radiation. The emission of true L-characteristic radiation is also calculated and is found to be about one-third of the total emission for generating potentials between 15 and 30 kv. The total emission derived by calculation agrees well that determined experimentally.