A position-sensitive photodetector for studying the spatial - time radiation intensity distribution in a laser beam

摘要

A position-sensitive nine-sectional photodetector for studying the spatial-time distribution of the radiation intensity in a laser beam is described. The photodetector was developed according to the technology used in the production of silicon surface-barrier detectors of nuclei fission fragments. Its sensitivity at a wavelength of 1.06 μm is 0.1 A/W, and the mutual interference of its sections is within 10%. The device was used in studies of the spatial-time evolution of the optical characteristics of an active medium based on an uraniumcontaining liquid during nuclear pumping on a pulsed reactor.