用于高重复率汤姆逊散射的脉冲串激光系统的首次运行。

Initial operation of a pulse-burst laser system for high-repetition-rate Thomson scattering.

作者信息

Harris W S, Den Hartog D J, Hurst N C

机构信息

Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.

出版信息

Rev Sci Instrum. 2010 Oct;81(10):10D505. doi: 10.1063/1.3466901.

DOI:10.1063/1.3466901

PMID:21033860

Abstract

A pulse-burst laser has been installed for Thomson scattering measurements on the Madison Symmetric Torus reversed-field pinch. The laser design is a master-oscillator power-amplifier. The master oscillator is a commercial Nd:YVO(4) laser (1064 nm) which is capable of Q-switching at frequencies between 5 and 250 kHz. Four Nd:YAG (yttrium aluminum garnet) amplifier stages are in place to amplify the Nd:YVO(4) emission. Single pulses through the Nd:YAG amplifier stages gives energies up to 1.5 J and the gain for each stage has been measured. Repetitive pulsing at 10 kHz has also been performed for 2 ms bursts, giving average pulse energies of 0.53 J with ΔE/E of 4.6%, where ΔE is the standard deviation between pulses. The next step will be to add one of two Nd:glass (silicate) amplifier stages to produce final pulse energies of 1-2 J for bursts up to 250 kHz.

摘要

一台脉冲串激光器已安装在麦迪逊对称环面反向场箍缩装置上，用于汤姆逊散射测量。该激光器采用主振荡功率放大设计。主振荡器是一台商用钕:钒酸钇激光器（1064纳米），能够在5至250千赫的频率下进行调Q。有四个钕:钇铝石榴石放大器级用于放大钕:钒酸钇的发射光。单个脉冲通过钕:钇铝石榴石放大器级可产生高达1.5焦耳的能量，并且已测量了每个级的增益。还以10千赫的频率进行了2毫秒脉冲串的重复脉冲操作，平均脉冲能量为0.53焦耳，能量分散ΔE/E为4.6%，其中ΔE是脉冲之间的标准偏差。下一步将添加两个钕:玻璃（硅酸盐）放大器级中的一个，以产生高达250千赫的脉冲串的最终脉冲能量为1至2焦耳。