Abstract
Features of design of the Doppler reflectometry diagnostics at the L-2M stellarator are discussed. This contact-free diagnostics is intended for experiments carried out under conditions of high-power microwave plasma heating at a frequency of electron cyclotron resonance. Resources of the proposed Doppler reflectometry scheme were studied with allowance for the installation of a new system of rejection microwave filters involving the Fabry–Perot resonance filter and pin-shaped waveguide filters. The simulation results of the resonator-filter operation as well as the results of test measurements using the MVNA-8-350 millimeter vector network analyzer are presented.
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