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

Abstract r(/+- t  
Two-dimensional full-wave time-dependent simulations in full plasma g h&,U`  
geometry are presented, which show that conventional reflectometry (without a B3&`/{u  
lens) can be used to synthetically image density fluctuations in fusion plasmas +S}/6dg  
under conditions where the parallel correlation length greatly exceeds the ^y&sKO  
poloidal correlation length of the turbulence. The advantage of synthetic l=t$XWh!  
imaging is that the image can be produced without the need for a large lens of NT [~AK9M  
high optical quality, and each frequency that is launched can be independently A{QA0X!p  
imaged. A particularly simple arrangement, consisting of a single receiver =(>pv,  
located at the midpoint of a microwave beam propagating along the plasma AU^5N3%j  
midplane is shown to suffice for imaging purposes. However, as the ratio of the !5[5l!{x  
parallel to poloidal correlation length decreases, a poloidal array of receivers THDyb9_g  
needs to be used to synthesize the image with high accuracy. Simulations using [5Pin>]z  
.. p EbyQ[  
6 VuMx7W1  

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