부산대학교 도서관

Electron Cyclotron Emission (ECE) radiometer diagnostics are broadband receivers that are widely used as standard microwave diagnostics for measurement of localized thermal plasma temperature profiles. Calibration of these diagnostics is usually done using high temperature sources that possess blackbody like properties. A silicon carbide based high temperature blackbody source is used to calibrate the E-band (60-90 GHz) radiometers at Institute for Plasma Research (IPR). To understand the characteristics of the designed silicon carbide calibration source in the microwave range, Sparameters are determined using ABmm wave VNA. This manuscript discusses the results obtained from the characterization over a wide frequency range starting from Kaband (26-40GHz) to D-band (140-160GHz) satisfying the varied frequency requirements from the tokamak experimentation end. Linearity test of the designed source is obtained using existing multi-channel radiometer that lies within acceptable limits while the temperature distribution characteristics are observed using an Infrared (IR) Camera. Experimental characterizations of black body source exhibit high absorption capabilities of $\gt60$ dB in $\gt50$ GHz frequency range with a reflection coefficient of $\leq$20dB.