Development of the HCN heterodyne collective scattering system on J-TEXT
Development of the HCN heterodyne collective scattering system on J-TEXT
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J-TEXT 上 HCN 外差集体散射系统的开发
DOI：
10.1088/2058-6272/ac5d08
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发表时间：
2022-03
影响因子：
1.7
通讯作者：
The J-Text Team
中科院分区：
文献类型：
--
作者：
Tao Qinlin;Shi Peng;Gao Li;Wang Lu;Chen Zhongyong;Jiang Zhonghe;Zhou Yinan;Yang Chengyu;Wang Yuhan;Chen Zhipeng;Wang Nengchao;Yang Zhoujun;Ding Yonghua;Pan Yuan;The J-Text Team
设计并开发了一种外差集体散射系统，用于研究J-TEXT上核心等离子体的湍流输运。散射系统的激光源是由两个独立泵浦的337 μm HCN气体激光器组成的双HCN激光器。当腔长差为4 μm时，中频（IF）约为1 MHz，无需手动操作即可保持稳定超过5 h。三个不同角度（2 ≤ k_⊥）的检测通道≤12 cm~(-1))安装了893 GHz的肖特基势垒二极管混频器。采集系统的采样频率为;;6 MHz，用于观察低频密度波动。初步的实验结果已经检测到，在未来的实验中可以期待更多的结果。
A heterodyne collective scattering system has been designed and developed to investigate the turbulent transport of core plasma on J-TEXT.A dual-HCN laser which consists of two separately pumped HCN gas lasers at 337 μm has been developed as the laser source of the scattering system.The intermediate frequency (IF) is ~1 MHz when there is a 4 μm cavity length difference and capable to maintain stability more than 5 h without manual operation.Detection channels at three different angles (2 ≤ k_⊥ ≤ 12 cm~(-1)) have been installed with Schottky barrier diode mixers of 893 GHz.The sampling frequency of the acquisition system is;;6 MHz to observe low-frequency density fluctuations.Initial experimental results have been detected and more results can be expected in future experiments.