Угловое распределение когерентного оптического переходного излучения в ближней зоне

Abstract

The influence of the near field zone condition on the angular distribution pattern of coherent optical transition radiation was studied. The correlation between the form of mentioned distribution and transverse size of the electron beam was defined. The comparison of calculation results for the coherent optical transition radiation for two different formula one of which takes into account the near field zone condition and the other doesn't was carried out. It is shown that the difference between two of them is sufficient only when the certain conditions are met (when the transverse size of the beam approaches to [gamma][lambda]/2[pi] ).