Den Hartog D J, Jiang N, Lempert W R
Department of Physics and Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Rev Sci Instrum. 2008 Oct;79(10):10E736. doi: 10.1063/1.2965733.
A "pulse-burst" laser system is being constructed for addition to the Thomson scattering diagnostic on the Madison Symmetric Torus (MST) reversed-field pinch. This laser is designed to produce a burst of up to 200 approximately 1 J Q-switched pulses at repetition frequencies 5-250 kHz. This laser system will operate at 1064 nm and is a master oscillator, power amplifier. The master oscillator is a compact diode-pumped Nd:YVO(4) laser, intermediate amplifier stages are flashlamp-pumped Nd:YAG, and final stages will be flashlamp-pumped Nd:glass (silicate). Variable pulse width drive (0.3-20 ms) of the flashlamps is accomplished by insulated-gate bipolar transistor switching of large electrolytic capacitor banks. The burst train of laser pulses will enable the study of electron temperature (T(e)) and electron density (n(e)) dynamics in a single MST shot, and with ensembling, will enable correlation of T(e) and n(e) fluctuations with other fluctuating quantities.
正在建造一个“脉冲串”激光系统，用于麦迪逊对称环面（MST）反向场箍缩装置的汤姆逊散射诊断。该激光器旨在以5 - 250 kHz的重复频率产生高达200个约1 J的调Q脉冲串。该激光系统将在1064 nm波长下运行，是一个主振荡器功率放大器。主振荡器是一个紧凑型二极管泵浦的Nd:YVO₄激光器，中间放大级是闪光灯泵浦的Nd:YAG，最后几级将是闪光灯泵浦的Nd:玻璃（硅酸盐）。通过大型电解电容器组的绝缘栅双极晶体管开关实现闪光灯的可变脉冲宽度驱动（0.3 - 20 ms）。激光脉冲串将能够在单个MST放电中研究电子温度（T(e)）和电子密度（n(e)）动力学，并且通过集合，将能够使T(e)和n(e)波动与其他波动量相关联。
