Possibilities of Neutral Particle Diagnostics for Deuterium–Hydrogen Plasma Research at the TRT Facility

The article examines the possibilities of using neutral particle diagnostics to measure ion temperature and the isotopic composition of deuterium–hydrogen plasma in the Tokamak with Reactor Technologies (TRT). To determine the most favorable mutual arrangement of the diagnostic equipment, computer modeling of deuterium and hydrogen atomic fluxes was performed for the “active” diagnostic variant (with injection of a diagnostic atomic beam into the plasma) and the “passive” variant (without injection of a beam). As an example, the baseline operating regime with a plasma deuterium-to-hydrogen density ratio of 90% (D)/10% (H) is considered. It is shown that, in the “active” variant, the diagnostics allows local measurements of ion temperature and the plasma isotopic ratio with a spatial resolution of ≈13 cm. In the “passive” variant, this value is ≈30 cm. The temporal resolution is no worse than 10 ms for the “passive” variant and 1 ms for the “active” variant.