[仿真]Simulation of optical and synthetic imaging using microwave reflectometry

Abstract lD# yXLaC\  
Two-dimensional full-wave time-dependent simulations in full plasma E=,fdyj.  
geometry are presented, which show that conventional reflectometry (without a P/k#([:2  
lens) can be used to synthetically image density fluctuations in fusion plasmas ,Vz-w;oDn  
under conditions where the parallel correlation length greatly exceeds the *W 04$N  
poloidal correlation length of the turbulence. The advantage of synthetic R-4#y%k<  
imaging is that the image can be produced without the need for a large lens of ^0(D2:E  
high optical quality, and each frequency that is launched can be independently fX1Ib$v  
imaged. A particularly simple arrangement, consisting of a single receiver U:PtRSdn!b  
located at the midpoint of a microwave beam propagating along the plasma e%9zY{ABR%  
midplane is shown to suffice for imaging purposes. However, as the ratio of the "0z4mQ}>N  
parallel to poloidal correlation length decreases, a poloidal array of receivers .+lx}#-#  
needs to be used to synthesize the image with high accuracy. Simulations using 2@N-#x'  
.. &*Kk> 4  
z'gJy  

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