Q-Band X-Mode Reflectometry and Density Profile Reconstruction  

作　　者：屈浩 张涛 张寿彪 文斐 王嵎民 孔德峰 韩翔 杨曜 高宇 黄灿斌 蔡剑青 高翔 the EAST team 

机构地区：[1]Institute of Plasma Physics,Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2015年第12期985-990,共6页等离子体科学和技术（英文版）

基　　金：supported by the National Magnetic Confinement Fusion Science Program of China(Nos.2014GB106000 and 2014GB106003);National Natural Science Foundation of China(Nos.11275234,11305215,11305208)

摘　　要：By installing an X-mode polarized Q-band（32-56 GHz） reflectometry at the low field side on EAST,the zero density cutoff layer was determined and the edge density profile was measured in normally operating plasmas.A Monte Carlo procedure has been developed to analyze the density profiles by considering the error of time delay measured by reflectometry.By combining this Q-band and previously developed V- and W-band reflectometries,the density profiles from edge to core can be measured in most EAST experiments.The line integrated densities deduced from density profiles measured by reflectometry are consistent with those directly measured by a horizontal interferometer.The density pedestal measured by reflectometry shows a clear crash during an ELM（edge localized mode） event,after which the pedestal gradually increases and recovers in 10 ms and then remains little changed up to the next ELM.By installing an X-mode polarized Q-band（32-56 GHz） reflectometry at the low field side on EAST,the zero density cutoff layer was determined and the edge density profile was measured in normally operating plasmas.A Monte Carlo procedure has been developed to analyze the density profiles by considering the error of time delay measured by reflectometry.By combining this Q-band and previously developed V- and W-band reflectometries,the density profiles from edge to core can be measured in most EAST experiments.The line integrated densities deduced from density profiles measured by reflectometry are consistent with those directly measured by a horizontal interferometer.The density pedestal measured by reflectometry shows a clear crash during an ELM（edge localized mode） event,after which the pedestal gradually increases and recovers in 10 ms and then remains little changed up to the next ELM.

关 键 词：Reconstruction interferometer fitting normally EAST deduced considering normalized cutoff localized 

分 类 号：O53[理学—等离子体物理]