Laboratory Characterization of an Imaging Reflectometer System

Munsat, T. ; Mazzucato, E. ; Park, H. ; Domier, C.W. ; Jr., N.C. Luhmann ; Donne, A.J.H. ; Pol, M. van de

Princeton University. Plasma Physics Laboratory.

关键词: Reflection;    70 Plasma Physics And Fusion Technology;    Electron Density;    Microwaves;    Viability Microwaves;   

DOI  :  10.2172/809962
RP-ID  :  PPPL-3767
RP-ID  :  AC02-76CH03073
RP-ID  :  809962

美国|英语

来源: UNT Digital Library

【 摘 要 】

While microwave reflectometry has proven to be a sensitive tool for measuring electron density fluctuations in many circumstances, it has also been shown to have limited viability for core measurements and/or conditions of strong turbulence. To this end, a new instrument based on 2-D imaging reflectometry has been developed to measure density fluctuations over an extended plasma region in the TEXTOR tokamak. Laboratory characterization of this instrument has been performed using corrugated reflecting targets as an approximation to plasma reflections including 2-D turbulent fluctuations of various magnitude and poloidal wavenumber. Within this approximation, the imaging reflectometer can recover the spectral and spatial characteristics of the reflection layer lost to or otherwise inaccessible to conventional techniques.