A 20-Channel Grating Polychromator for Electron Cyclotron Emission Measurements on EAST
A 20-Channel Grating Polychromator for Electron Cyclotron Emission Measurements on EAST
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DOI：
10.13182/fst11-a11730
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发表时间：
2011-05
影响因子：
0.9
通讯作者：
Yong Liu;E. Li;B. Ling;A. Ti;Gary Taylor
中科院分区：
文献类型：
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作者：
Yong Liu;E. Li;B. Ling;A. Ti;Gary Taylor
摘要对普林斯顿等离子体物理实验室的一台20通道光栅多色仪进行了改造，用于EAST上的电子回旋辐射测量。该仪器测量了频率为90 ~ 250 GHz的等离子体的二次谐波电子回旋辐射，对应于EAST上2 ~ 3.5 T的中心磁场（R0 = 1.7 m）。该仪器的径向分辨率[约]2.5 cm，准光学天线的极向光斑尺寸[约]3 cm。基于GPC-II在TFTR上的电子器件，制作并测试了新型前置放大器。这些放大器的增益约为520，具有400 khz， 3 db的滚降。2010年EAST实验活动的测量结果表明，当电子温度为850 eV时，该仪器的强度[约]200 mV，信噪比[约]20。
Abstract A 20-channel grating polychromator transferred from Princeton Plasma Physics Laboratory has been rebuilt for electron cyclotron emission measurements on EAST. This instrument measures the second-harmonic electron cyclotron emission from plasma with frequency range from 90 to 250 GHz, which corresponds to a central magnetic field (R0 = 1.7 m) of 2 to 3.5 T on EAST. The radial resolution of this instrument is [approximately]2.5 cm, and the poloidal spot size of the quasi-optic antenna is [approximately]3 cm. New preamplifiers are made and tested, based on the electronics of GPC-II on TFTR. These amplifiers have a gain of around 520, with a 400-kHz, 3-dB rolloff. Measurement results from the 2010 EAST experimental campaign show that the intensity of this instrument is [approximately]200 mV for electron temperature of 850 eV, and the signal-to-noise ratio is [approximately]20.