Antimony Hall sensor testing at ITER and DEMO relevant temperatures

Abstract

Measurements of the steady-state magnetic field of ITER and DEMO reactors will be performed by Hall sensors that will be part of the magnetic diagnostics. The sensors will contribute to the measurement of the plasma current, plasma-wall clearance, and local perturbations of the magnetic flux surfaces near the wall. The paper describes new ceramic-metal Hall sensors with an antimony sensing layer. The results of temperature tests of second-generation antimony sensors based on thick printed copper technology are presented, including testing of the long-term stability of the sensors.