title: Characterization and calibration of 8-channel E-band heterodyne radiometer system for SST-1 tokamak.
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.
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428, India.
authors.forename: Varsha
authors.initials: V
authors.lastname: Siju
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428, India.
authors.forename: Dharmendra
authors.initials: D
authors.lastname: Kumar
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428, India.
authors.forename: Praveena
authors.initials: P
authors.lastname: Shukla
authors.affiliation: Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Pathak