Upgrade of reflectometry profile and fluctuation measurements in Alcator C-Mod
Upgrade of reflectometry profile and fluctuation measurements in Alcator C-Mod
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DOI：
10.1063/1.1149370
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发表时间：
1999-01
影响因子：
1.6
通讯作者：
Yi-bing Lin;J. Irby;P. Stek;I. Hutchinson;J. Snipes;R. Nazikian;M. Mccarthy
中科院分区：
文献类型：
--
作者：
Yi-bing Lin;J. Irby;P. Stek;I. Hutchinson;J. Snipes;R. Nazikian;M. Mccarthy
本文报道了Alcator C-Mod反射仪剖面和波动测量的升级。反射仪由五个调幅O模式毫米波通道组成，工作频率在50和110 GHz之间。该系统提供密度高达1.5×1020 m−3的电子密度分布。为了提高系统的可靠性，消除群时延测量中的2π模糊度，提高系统的波动测量能力，对系统进行了改进。已安装了88 GHz信道的升级版，可独立测量上边带和下边带信号的波动，分辨率高。一些初步的波动和密度分布的结果进行了讨论。
This article reports on the upgrade of the reflectometry profile and fluctuation measurements in Alcator C-Mod. The reflectometer consists of five amplitude modulated O-mode millimeter-wave channels operating between 50 and 110 GHz. The system provides the electron density profile for densities up to 1.5×1020 m−3. An upgrade has been implemented to improve the reliability of the system, eliminate 2π ambiguities in the group delay measurement, and enhance the fluctuation measurements. An upgrade of the 88 GHz channel has been installed, which allows fluctuations on both the upper and lower sideband signals to be measured independently with high resolution. Some preliminary fluctuation and density profile results are discussed.