PLASMA-BERYLLIUM INTERACTIONS RESEARCH IN THE SAPFIR DEVICE

The investigation of the plasma-beryllium interaction under steady-sta te high power density plasma flow in SAPFIR device has started. The ma in parameters of the SAPFIR device in this experiments were: power den sity of the plasma flow up to 6 MW/m(2) at ion energy up to 8.5 keV. T he radial profile of the power density was measured in different regim es. The optimal regime was defined. The erosion rates of beryllium wer e measured for different power density of the plasma flow. The exposit ion time was up to 1 hour, and after that the weight losses were deter mined. The preliminary dependence of the beryllium erosion rate on the plasma fluence was obtained. These experimental results are discussed and compared with known experimental data.