System for target irradiation in the Iskra-6 high-power laser facility

An analysis is made of various systems for direct irradiation of a target enabling achievement of a high degree of the irradiation uniformity. The required departure from uniformity of target irradiation, δI/I ≤ 1%  – 2%, may be attained when the number of laser beams is N ≥ 80, the diameter of the waist is approximately equal to the target diameter, and the intensity profile in the waist is Gaussian or super-Gaussian. Various methods of forming the necessary intensity distribution in a transverse cross section of a beam are considered.