We have developed a solid state probe for an absolute irradiance calibration of the Thomson scattering system on the Large Plasma Device (LAPD), based on Raman scattering off silica. Measurements performed with a triple-grating spectrometer have investigated the intensities of a pulsed laser beam Raman scattered off crystalline and amorphous silica over a range of temperatures of relevance to the LAPD (299–498 K). The data were compared with Rayleigh and Raman scattering intensities in gaseous nitrogen. The measurements show that Raman scattering off quartz allows rapid and accurate alignment and calibration of Thomson scattering systems in plasma physics experiments that cannot be calibrated using conventional methods.

我们开发了一种固态探针，用于基于二氧化硅的拉曼散射对大等离子体设备 (LAPD) 上的汤姆森散射系统进行绝对辐照度校准。使用三光栅光谱仪进行的测量研究了在与 LAPD 相关的温度范围 (299–498 K) 内从结晶和非晶二氧化硅散射的脉冲激光束拉曼的强度。将数据与气态氮中的瑞利和拉曼散射强度进行比较。测量结果表明，石英的拉曼散射可以在等离子体物理实验中快速准确地对准和校准汤姆森散射系统，而这些系统无法使用传统方法进行校准。