Collective Thomson Scattering of 77 GHz High-Power ECRH Beam in LHD
Collective Thomson Scattering of 77 GHz High-Power ECRH Beam in LHD
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LHD 中 77 GHz 高功率 ECRH 光束的集体汤姆逊散射
DOI：
10.1002/ctpp.200900042
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. Saito(他5名3番目)
中科院分区：
文献类型：
--
作者：
S. Kubo;M. Nishiura;K. Tanaka;N. Tamura;T. Shimozuma;Y. Tatematsu;T. Saito(他5名3番目)
在反应堆等离子体中，离子速度分布的测量尤为重要。集体汤姆逊散射（CTS）是目前研究离子速度分布函数最有前途的方法之一。尽管这种方法有潜力，但长期以来一直受到缺乏足够能源的困扰。近年来，回旋管的高功率、高频率范围和传输技术的发展，使离子速度分布函数的测量不仅能够实现体分量的测量，而且能够实现高能分量的测量。在LHD中新安装的77 GHz回旋管之一可以在5 s内产生超过1 MW的功率，并连接到高斯镜像波束发射天线组之一，用作CTS的探测波束。在传输线的上游安装了一个具有固定频率本振的基频混频器的外差接收系统。探测光束以50 Hz进行100%功率调制，以将散射分量与背景ECE分离。获得了可归因于CTS的信号，并开发了这些数据的分析方法（© 2010 WILEY-VCH Verlag GmbH & Co. KGaA，魏因海姆）。
The measurement of the ion velocity distribution is especially important in reactor relevant plasmas. The collective Thomson scattering (CTS) is one of the most promising methods for evaluating the ion velocity distribution function. In spite of its potential, this method had long been suffered from the absence of adequate power sources. Recent development in the higher power, and higher frequency range of the gyrotron and the transmission technique enabled to realize the measurement of not only the bulk but also high energy component of the ion velocity distribution function. One of the newly installed 77 GHz gyrotrons in LHD that can generate more than 1 MW over 5 s and is connected to one of the Gaussian mirror beam launching antenna sets is used as a probing beam for CTS. A heterodyne receiver system of a fundamental mixer with fixed frequency local oscillator was installed on the upstream of the transmission line. The probe beam is 100% power modulated at 50 Hz to separate the scattering component from background ECE. Signals that can be attributed to the CTS were obtained and the analysis method of these data are developed (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)