Developments Of Optical Fast-Gated Imaging Systems

Abstract

Several fast -gated imaging systems to measure ultra -fast single-transient data have been developed for time -resolved imaging of pulsed radiation sources. These systems were designed to achieve image recording times of 1 -3 ms and dynamic ranges of >200:1 to produce large two -dimensional images (>104 spatial points) of 1 -2 ns exposure and small two -dimensional images (>200 spatial points) of <0.5 ns exposure. Both MCP intensified solid -state two -dimensional framing cameras and streak camera /solid -state camera systems were used; the framing camera system provides snap shots with high spatial resolution whereas the streak camera system provides for limited spatial points each with high temporal resolution. Applications of these systems include electron -beam, x -ray, gamma -ray, and neutron diagnostics. This report reviews the characteristics of the major components of fast -gated imaging systems developed at Lawrence Livermore National Laboratory. System performances are described in view of major experiments, and the diagnostic requirements of new experiments in atomic physics (x -ray lasers) and nuclear physics (fusion) are indicated.