Example of WDS style article: MS WORD template

A principally new diagnostic method has to be developed to complement the magnetic measurements in true steady state regime of operation of future fusion reactors. One of the options is the use of diagnostics based on Hall sensors that are well established in experimental physics and industry, although it is rarely implemented in the fusion plasma physics due to short pulse operation of majority of present day tokamaks. There are two main issues associated with the use of Hall sensors in harsh environment of future fusion reactors i.e. low survival temperature of presently available commercial transducers and questionable stability of these mostly semiconductor sensors under neutron irradiation. Hall sensors based on InSb thin film layers are presently being evaluated as one of the perspective options for ITER ex-vessel steady state magnetic sensors. Here, the compatibility with vacuum vessel baking temperature of 220 C and with the peak life time neutron fluence of 10 n/cm has to be demonstrated. Even higher performance will be required for application of these sensors on DEMO and beyond. Recently, the InSb Hall sensors with operational temperature up to 300 C were developed. We investigated impact of neutron irradiation on these sensors at experimental light-water tank reactor LVR-15 (10 MW). Effect of transmutation by thermal neutrons was studied separately using CdTe/InSb shielding of sensing InSb layer. CdTe/InSb shielding blocks neutrons with energy lower than 0.1 eV. Parameters of the samples (input/output resistance, sensitivity, offset voltage, free charge carrier density) were measured before and after irradiation up to the neutron fluence of 10 n/cm. Stability of parameters within a few percents was observed for the InSb sensors highly doped by Sn. This contribution summarizes recent results of evaluation of irradiation effects on InSbbased high-temperature Hall sensor's properties and it proposes shielding as a method to avoid changes of the sensor properties caused by transmutation.