An Outlook into a Possible Intensified Camera Based Thomson Scattering System for High Temperature Plasmas

Abstract

A possible intensified camera based Thomson scattering (TS) system for high temperature plasma measurement of over 100 eV is investigated. The TS system is not specific to a certain device, but can be applicable to any plasma source capable of producing high temperatures with densities of over 1 × 1019/m−3 range. A code has been developed to estimate the number of collectable scattered photons and its corresponding photoelectrons. The system uses an sCMOS intensified camera, which comes with many convenient features in terms of precise timing, digitization, and its compactness. Due to the broad wavelength range of the scattering spectrum, to increase detection of photons per pixel, the optical setup have to compromise of the most efficient element that uses volume phase holographic (VPH) grating and a wire grid polarizer. Off-the-shelf components have been chosen for the VPH spectrometer, intensified camera, and the 532 nm Nd:YAG laser that is available up to 5 J/pulse without custom request. Two separate magnification ratio 1:2 and 1:3 of the collection lens are considered for estimating the TS signal during a single laser shot.