GAMMA-RAY SPECTROMETRY FOR BURNING PLASMA SCENARIO DEVELOPMENTS
Several fusion plasma devices with magnetic confinement aimed at the burning deuterium-tritium plasma experiments are under construction or at a design stage that includes diagnostics design. Gamma-ray measurements, as well as neutron diagnostics are among the very restricted set of plasma diagnostics that can be acceptable in future D-T fusion machines by reason of a severe radiation environment. In this paper, we propose several applications using γ-ray diagnostics during all reactor exploitation phases, from the no-/low-activation to the burning D-T plasmas, for setup of plasma discharges, characterisation of the auxiliary plasma heating, development of optimised plasma scenarios and fusion born alpha-particle studies. Nuclear reactions generating γ-rays, which are suitable for measurements in fusion devices, have been selected. Recommendations for their usage based on the previous experience of the γ-ray diagnostic operation on Joint European Torus are provided. This paper provides insights for design and modelling γ-ray diagnostic systems as well as testing them in currently working fusion devises before the use in the burning plasma machines.