SOME DYNAMIC PROBLEMS IN STREAK IMAGE TUBES THEORY

Some problems regarding of theoretical and computer-aided studies of i ntegral characteristics of dynamic emission-imaging electron-optical s ystems (streak image tubes) are considered on the basis of perturbatio n theory. The first part of this work is devoted to the derivation of a spatial/temporal instrumental function by means of a tau-variations technique developed earlier. In the second part a general approach to computer simulations of Coulomb repulsion effects in streak image tube s is suggested. The approach is based on an approximation of the initi al quasistationary self-coordinate boundary-value problem for the elec tric field and charged particles trajectories through a sequence of Ca uchy problems for aberration expansion coefficients of electron beam i n the tau-representation.