Development of multichannel intermediate frequency system for electron cyclotron emission radiometer on KSTAR Tokamak

被引：12
|
作者：
Kogi, Yuichiro [1 ]
Sakoda, Takuya [1 ]
Mase, Atsushi [1 ]
Ito, Naoki [1 ]
Yokota, Yuya [1 ]
Yamaguchi, Soichiro
Nagayama, Yoshio
Jeong, Seung H. [2 ]
Kwon, Myeun [3 ]
Kawahata, Kazuo
机构：
[1] Kyushu Univ, Art Sci & Technol Ctr Cooperat Res, Fukuoka 8168580, Japan
[2] Korea Atom Energy Res Inst, Taejon, South Korea
[3] Natl Fus Res Inst, Taejon, South Korea
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2008年 / 79卷 / 10期
关键词：
plasma diagnostics; plasma temperature; plasma toroidal confinement; radiometry; Tokamak devices;
D O I：
10.1063/1.2966380
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Plasma experiments on KSTAR are scheduled to start up this year (2008). We have developed an electron cyclotron emission (ECE) radiometer to measure the radial electron temperature profiles in KSTAR experiments. The radiometer system consists, briefly, of two downconversion stages, amplifiers, bandpass filter banks, and video detectors. These components are made commercially or developed in house. The system detects ECE power in the frequency range from 110 to 196 GHz, the detected signal being resolved by means of 48 frequency windows. Before installation of this system on KSTAR, we installed a part of this system on large helical device (LHD) to study the system under similar plasma conditions. In this experiment, the signal amplitude, considered to be proportional to the electron temperature, is measured. The time-dependent traces of the electron temperature measured by this radiometer are in good agreement with those provided by the LHD Michelson spectrometer. The system noise level which limits the minimum measurable temperature (converted to the electron temperature) is about 30 eV.
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页数：3
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