Measurement of Turbulence Propagation Velocity Using Doppler Reflectometer on HL-2A Tokamak  

作　　者：肖维文 丁玄同 刘泽田 姚良骅 孙红娟 段旭如 严龙文 杨青巍 

机构地区：[1]Southwestern Institute of Physics,Chengdu 610041,China

出　　处：《Plasma Science and Technology》2008年第4期403-406,共4页等离子体科学和技术（英文版）

基　　金：National Natural Science Foundation of China(Nos.10335060,10235010)

摘　　要：O-mode Doppler reflectometer has been successfully developed as an important diagnostic system on HL-2A. It can be used to measure the turbulence propagation in both plasma edge and confinement zone. The Doppler reflectometer system consists of two fixed frequency homodyne receivers： 15 GHz （corresponding to cutoff density of 0.3×10^19 m^-3） and 33 GHz （corresponding to cutoff density of 1.35× 10^19 m^-3）. The Doppler reflectometry principle and the experimental arrangements on HL-2A are presented. Meanwhile, the experimental Doppler reflectometric spectra under different discharge conditions, with and without ECRH, were obtained. Furthermore, the turbulence propagation velocity change and the profile were also observed in different discharge conditions.O-mode Doppler reflectometer has been successfully developed as an important diagnostic system on HL-2A. It can be used to measure the turbulence propagation in both plasma edge and confinement zone. The Doppler reflectometer system consists of two fixed frequency homodyne receivers： 15 GHz （corresponding to cutoff density of 0.3×10^19 m^-3） and 33 GHz （corresponding to cutoff density of 1.35× 10^19 m^-3）. The Doppler reflectometry principle and the experimental arrangements on HL-2A are presented. Meanwhile, the experimental Doppler reflectometric spectra under different discharge conditions, with and without ECRH, were obtained. Furthermore, the turbulence propagation velocity change and the profile were also observed in different discharge conditions.

关 键 词：Doppler reflectometer turbulence propagation velocity cutoff density 

分 类 号：O532[理学—等离子体物理]