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

Abstract TWA-.>c  
Two-dimensional full-wave time-dependent simulations in full plasma L*YynF  
geometry are presented, which show that conventional reflectometry (without a nih0
t^m'  
lens) can be used to synthetically image density fluctuations in fusion plasmas ;7}VBkH  
under conditions where the parallel correlation length greatly exceeds the ,P;Pm68V  
poloidal correlation length of the turbulence. The advantage of synthetic u6AA4(  
imaging is that the image can be produced without the need for a large lens of $<}$DH
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high optical quality, and each frequency that is launched can be independently IZpP[hov  
imaged. A particularly simple arrangement, consisting of a single receiver 8fl`r~bqZ  
located at the midpoint of a microwave beam propagating along the plasma n*2UnKaJ  
midplane is shown to suffice for imaging purposes. However, as the ratio of the #ZB~x6i6  
parallel to poloidal correlation length decreases, a poloidal array of receivers Lm%:K]X  
needs to be used to synthesize the image with high accuracy. Simulations using f|\onHI)>  
.. `@`CG[-9  
.yz}ROmN^  

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