W-band Doppler reflectometer

Resolves core turbulence suppression

Separating launch and receive circuits reduces broadband background noise, and the 1 GHz channel spacing enhances high-frequency performance over the previous version.

Liutian, Gao · Feng, Xi · Liu, Ahdi · Zhou, Chu · Weixing, Ding · Liu, Zhaoyang · Ge, Zhuang · Xie, Jinglin · Zhong, Xiaoming · Liu, Haiqing · Wang, Shouxin · Zhang, Bin · Yang, Zhang · Zhang, Junjie · Wang S.F. · Wenxiang, Shi · Qiu S.C. · Liuxin, Li · Chen X.Y. · Yanyi, Zhang · Li, Hong · Lan, Tao · Mao, Wenzhe · Liu, Zixi · WanDong, Liu · Song, Yuntao · Baonian, Wan · Li, Jian'gang · Wan, Yuanxi · Wu, Xinchao · Liu, Fukun · Chen, Junling · Hu, Jiansheng · Xu, Guosheng · Lu, Kun · Zhang, Xiaodong · Fu, Peng · Guo, Houyang · Liang, Yunfeng · Gong X. · Xiao, Bingjia · Yu, Wu · Gao, Xiang · Yao, Damao · Xiang, Nong · Hu, Liqun · Shan, Jiafang · Zhao, Yangping · Luo, Guangnan · Hu, Chundong · Wu, Jiefeng · Shen, Biao · Ji, Zhenshan · Gao, Ge · Huang, Yiyun · Xu, Liuwei · Zhang, Qiyong · Zhuang, Ming · Zhao, Junyu · Cao, Bin

Plasma Physics and Controlled Fusion 2025

Specifications

Available bandwidth
{'zh': '75–100.4', 'en': '75–100.4'} GHz
Core measurable region
{'zh': '0.2', 'en': '0.2'}
Doppler shift fluctuation amplitude
{'zh': '1', 'en': '1'} MHz

Advantages

Lower broadband noise

Separating the launch and receive circuits circumvents the reflection of the W-band filter on the launching microwave.

Broader core coverage

The frequency interval between adjacent channels has been increased from 400 MHz to 1 GHz to broaden the diagnostic range in the core.

Enhanced high-frequency performance

Following upgrades and careful optimization of power distribution, the performance in the high frequency range has been significantly enhanced, with available bandwidth of 75–100.4 GHz.

Applications