Ion heating in the Globus-M2 tokamak using the hydrogen and deuterium neutral beams injection

The paper is devoted to plasma heating study at the spherical tokamak Globus-M2. Injection of a deuterium beam into deuterium plasma allows obtaining significantly higher ion temperatures than in the case of hydrogen injection into deuterium plasma. In both cases the ion temperature significantly exceeds the electron temperature, and the plasma is in the so-called “hot ion mode”. The plasma energy confinement time in the case of deuterium injection is significantly higher than in the case of hydrogen injection due to the higher thermal insulation of the plasma ions.