The Study On Data Processing Algorithm Of MIR In Fusion Plasma

The development of Microwave Imaging Reflectometer is mainly based on the Microwave reflectometry and the large-aperture optial imaging theory,It has extensively used in plasmas for the detection 1-D、2-D、3-D turbulence and the perturbations of electron density.The principle of the MIR is that the space division of electron density is obtained through the cutoff surface of electron density in the plasma.The perturbations of electron density is obtained by the phase of the refection wave which is reflected by the virtual cutoff surface.The MIR is a innovative technology which diagnose the space division of electron density in plasma.However, The received signal processing in MIR is not clearly putted forward.I deeply and systematically make the research of the data processing of the MIR in this paper.This paper simply introduces the current situation and development of the MIR and expounds the basic principle of the MIR.This paper introduces the basic theory of the detection of plasma fluctuations through MIR and the doppler effect. A signal inversion algorithm and the data analysis algorithm of MIR base on these two theory are proposed and a signal processing software base on QT is written.This software mainly includes UI、the data acquisition、the data calculation、the data display and the data analysis.Finally, The software is tested by the experimental platform of the MIR in the fusion plasma. The signal inversion algorithm is correct by the experimental result.