Определение поперечного размера электронного пучка по сфокусированному когерентному переходному излучению

Abstract

The coherent optical transition radiation from electron beam was simulated. The dependence between parameters of the COTR beam image and beam transverse profile was determined. The possibility of using lens screening was examined. Mentioned technique allows one to simplify the image readout and increase the resolution of COTR imaging. It was found that the most optimal way of screening is a half-screening of the lens. In that regime it becomes possible to get rid of double-lobe structure of COTR image without further decrease in radiation intensity.