Collective Thomson scattering using a pulsed CO2 laser in JT-60U
Collective Thomson scattering using a pulsed CO2 laser in JT-60U
复制标题
JT-60U 中使用脉冲 CO2 激光器进行集体汤姆逊散射
DOI：
10.1063/1.1322616
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发表时间：
2001
影响因子：
1.6
通讯作者：
R. Richards
中科院分区：
文献类型：
--
作者：
T. Kondoh;S. Lee;D. Hutchinson;R. Richards
为了建立聚变反应等离子体中离子温度和快α粒子的测量技术，研制了一套基于CO2激光器的集体汤姆逊散射（CTS）诊断系统。成功地安装了脉冲CO_2激光器（15J，1 μ s，10.6 μ m）和带杂散光陷波滤波器的外差接收机。外差接收机的噪声等效功率低于9 × 10 − 19 W/Hz，最高频率为8 GHz。 用六通道滤波器组分析0.4~4.5GHz频率范围内的散射光光谱，测量离子温度，探测JT-60U（日本原子能研究所托卡马克60-Upgrade）等离子体负离子源中性束注入产生的快离子[S. Ishida，JT-60U Team，Nucl.Fusion 39，1211（1999）]。通过将CO_2激光注入JT-60U的真空室，对CTS系统进行了测试。对JT-60U真空室周围的杂散光信号进行了检测，并对检测系统的光学参数进行了优化。
A collective Thomson scattering (CTS) diagnostic system using a carbon dioxide (CO2) laser has been developed for the purpose of establishing measurement technique of ion temperature and fast alpha particle in a fusion reaction plasma. A pulsed CO2 laser (15 J, 1 μs at 10.6 μm) and a heterodyne receiver with a stray light notch filter has been successfully installed. The noise equivalent power of the heterodyne receiver is below 9×10−19 W/Hz up to a frequency of 8 GHz. A six-channel filter bank analyzes the spectrum of the scattered light in the frequency range from 0.4 to 4.5 GHz to measure ion temperature and to detect fast ions generated by negative-ion source neutral beam injection of the JT-60U (Japan Atomic Energy Research Institute Tokamak 60-Upgrade) plasmas [S. Ishida, JT-60U Team, Nucl. Fusion 39, 1211 (1999)]. Test of the CTS system by injecting the CO2 laser into the vacuum vessel of JT-60U has started. Stray light signal around the JT-60U vacuum vessel was detected and optimization of the opt...