Design of a new Nd:YAG Thomson scattering system for MAST.
Design of a new Nd:YAG Thomson scattering system for MAST.
复制标题
用于 MAST 的新型 Nd:YAG 汤姆森散射系统的设计。
DOI：
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发表时间：
2008
影响因子：
1.6
通讯作者：
H. Wilson
中科院分区：
文献类型：
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作者：
R. Scannell;M. Walsh;P. Carolan;A. Darke;M. Dunstan;R. Huxford;G. McArdle;D. Morgan;G. Naylor;T. O’Gorman;S. Shibaev;N. Barratt;K. Gibson;G. Tallents;H. Wilson
为MAST托卡马克设计了一种新的红外汤姆逊散射系统。该系统将在等离子体上以大约10毫米的分辨率测量120个空间点。8个30 Hz 1.6 J Nd:YAG激光器将组合在一起，产生240 Hz的采样率。激光将沿着单独的平行光束路径到达MAST容器。散射光将以大约f/6收集，散射角范围从80度到120度。相对于现有的1.2 J f/12系统，激光能量和透镜尺寸大大增加了每单位长度激光束收集的散射光子数量。这是该多色仪的第三代，并进行了一些修改，以促进大规模生产和提高性能。检测到的散射信号将通过8位模拟数字转换器（adc）以1 GS/s的速率进行数字化。数据可以从激光脉冲之间的adc中读出，以便进行实时分析。
A new infrared Thomson scattering system has been designed for the MAST tokamak. The system will measure at 120 spatial points with approximately 10 mm resolution across the plasma. Eight 30 Hz 1.6 J Nd:YAG lasers will be combined to produce a sampling rate of 240 Hz. The lasers will follow separate parallel beam paths to the MAST vessel. Scattered light will be collected at approximately f/6 over scattering angles ranging from 80 degrees to 120 degrees. The laser energy and lens size, relative to an existing 1.2 J f/12 system, greatly increases the number of scattered photons collected per unit length of laser beam. This is the third generation of this polychromator to be built and a number of modifications have been made to facilitate mass production and to improve performance. Detected scattered signals will be digitized at a rate of 1 GS/s by 8 bit analog to digital converters (ADCs.) Data may be read out from the ADCs between laser pulses to allow for real-time analysis.