Behaviour of an ion component during the pellet injection on T-10

Along with the main task - pellet injection utilization for plasma fueling (plasma density profile shaping) - the experiments with pellet injection are of interest from the viewpoint of studying the energy and particle balance in plasma. A given study is devoted to the ion energy balance in the T-10 tokamak plasma under injection of a deuterium pellet, 1 mm in size. For this purpose the behaviour of atomic charge-exchange fluxes was studied with a multichannel atomic analyzer with a sufficiently - high time resolution (1 msec) allowing one to obtain the ion temperature behaviour representation in time under injection and to analyze the ion energy balance on the basis of these data. The measurements were realized under Ohmic plasma heating in the modes of operation with I=230 kA, B=3.0 T. A characteristic feature of these experiments is the fact that a pellet giving an amount of particles comparable with the total number of particles in the plasma column is injected into it. In this case, in principle, one can study the nature of ion energy balance per pulse in a rather wide plasma density range. (author) 4 refs., 3 figs