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Characterization and calibration of 8-channel E-band heterodyne radiometer system for SST-1 tokamak
Varsha Siju1, Dharmendra Kumar1, Praveena Shukla1
1Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428, India.
Abstract:
An 8-channel E-band heterodyne radiometer system (74-86 GHz) is designed, characterized, and calibrated to measure the radial electron temperature profile by measuring Electron Cyclotron Emission spectrum at SST-1 Tokamak. The developed radiometer has a noise equivalent temperature of 1 eV and sensitivity of 5 × 10(9) V/W. In order to precisely measure the absolute value of electron temperature, a calibration measurement of the radiometer system is performed using hot-cold Dicke switch method, which confirms the system linearity.
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