Plasma potential evolution in the scenarios with cryogenic pellet injection in TUMAN-3M tokamak

In TUMAN-3M tokamak the series of experiments with cryogenic hydrogen pellet injection was carried out. In these experiments the evolution of plasma potential in central and peripheral regions of plasma discharge was studied by means of heavy ion beam probe and Langmuir probe diagnostics. Measurements show that the evaporation of solid pellet in the chosen experimental set-up could initiate temporal confinement improvement (up to 2–3 ms).