X-mode heterodyne reflectometer for edge density profile measurements on Tore Supra
X-mode heterodyne reflectometer for edge density profile measurements on Tore Supra
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DOI：
10.1063/1.1319865
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发表时间：
2001-01
影响因子：
1.6
通讯作者：
F. Clairet;R. Sabot;C. Bottereau;J. Chareau;M. Paume;S. Heuraux;M. Colin;S. Hacquin;G. Leclert
中科院分区：
文献类型：
--
作者：
F. Clairet;R. Sabot;C. Bottereau;J. Chareau;M. Paume;S. Heuraux;M. Colin;S. Hacquin;G. Leclert
一个新的宽带反射计工作在50-75 GHz的频率范围内，在非常模式偏振已被开发和测试Tore Supra测量边缘密度分布。它采用固态源和有源倍频器，在20 μs内完成常规测量。源频率的调制是外差检测的线索，以确保高动态灵敏度，而无需任何锁相系统。反射计可以在扫描之间实现5 μs的重复率，因此可以跟踪快速等离子体事件的动态行为。该配置文件是完全自动重建的原始数据和初始化是通过检测的第一个截止。这些简介是Tore Supra公共数据库的一部分。对各种等离子体条件的高可靠性的测量使得该诊断成为研究等离子体-表面相互作用物理和射频天线耦合过程的理想工具。
A new broadband reflectometer operating in the frequency range 50–75 GHz in extraordinary mode polarization has been developed and tested on Tore Supra to measure edge density profiles. Using solid state source and active frequency multipliers, it performs routine measurements in 20 μs. Modulation of the source frequency is the clue to heterodyne detection in order to ensure a high dynamic sensitivity without any phase locking system. The reflectometer can achieve a repetition rate of 5 μs between sweeps, so the dynamic behavior of fast plasma events can be followed. The profile is reconstructed fully automatically from raw data and initialization is given by detection of the first cutoff. The profiles are part of the public database of Tore Supra. High reliability of the measurements for various plasma conditions makes this diagnostic an ideal tool to study the plasma–surface interaction physics and rf antenna coupling processes.