Lithium beam-activated charge exchange spectroscopy for boundary plasma diagnostics

The plasma boundary affects the energy balance and dynamics of the magnetically confined fusion plasma. But because of the small spatial dimensions, the inhomogeneous spatial structure and the lack of reliable atomic collision data limit the use of the established diagnostic techniques. A new method, lithium beam activated charge exchange spectroscopy, described in this paper, gives model independent data for plasma parameters: density and temperature of protons, electrons and impurity ions. (D.Gy.)