Five-channel tunable W-band Doppler backscattering system in the experimental advanced superconducting tokamak

Autor:	C. Zhou, Z. Y. Liu, Xuefei Feng, Ge Zhuang, Z. X. Liu, Tao Lan, J. X. Ji, Song Zhang, Weihao Liu, Mengyu Wang, H. Li, Liqun Hu, J. Zhang, H.R. Fan, Weixing Ding, J. L. Xie, Tianfu Zhou, Wenzhe Mao, A. D. Liu, Defeng Kong, Yong Liu
Rok vydání:	2019
Předmět:	010302 applied physics Physics Sideband business.industry Scattering Frequency multiplier Bandwidth (signal processing) 01 natural sciences 010305 fluids & plasmas symbols.namesake Optics W band 0103 physical sciences symbols Wavenumber Ray tracing (graphics) business Instrumentation Doppler effect
Zdroj:	Review of Scientific Instruments. 90:024704
ISSN:	1089-7623 0034-6748
Popis:	A 5-channel Doppler backscattering system has been designed and installed in the Experimental Advanced Superconducting Tokamak (EAST). Through an I/Q-type double sideband modulator and a frequency multiplier, an array of finely spaced (Δf = 400 MHz) frequencies that span 1.6 GHz has been created. The center of the array bandwidth is tunable within the range of 75-97.8 GHz, which covers most of the W band (75-110 GHz). The incident angle can be adjusted from -4° to 12°, and the wavenumber range is 4-15 cm-1 with a wavenumber resolution of Δk/k ≤ 0.35. Ray tracing is used to calculate the scattering location and the scattering wavenumber. This article details the hardware design, the ray tracing, and the preliminary experimental results from EAST plasmas.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10af913d1c40ad87c3e2b5a0bc776dd9 https://doi.org/10.1063/1.5075615 Zobrazit plný text záznamu