Speaker
Description
SAMI-2 is a microwave based MCF diagnostic, which stands for Synthetic Aperture Microwave Imager. It is the second iteration of the original microwave back-scattering diagnostic SAMI and uses a phased antenna array to allow digital focusing of 2D doppler backscattered radiation. SAMI-2 operates in the 20 – 40GHz region, allowing it to probe the edge region of MAST-U plasmas. The antenna array uses sinuous antennas allowing dual-polarisation measurements and it can diagnose 2 RF frequencies simultaneously. My PhD has focussed on the commissioning of the diagnostic and is currently in the stages of first operation and physics analysis. SAMI-2 can transmit at 2 independent RF frequencies simultaneous, where the frequency dictates the radius at which back-scattering occurs, allowing radial profiles to be constructed. The end goal is to produce edge magnetic pitch angle measurements at 2 simultaneous radii and to prove the successful operation of the diagnostic.
