PARTICLE DIAGNOSTICS

Many particle diagnostics are active techniques based on the injection of a beam of neutral atoms or charged ions into the plasma. As a resu lt of various processes, primary or secondary particles emerge from th e plasma. (Energy) analysis of these particles gives valuable informat ion on several important plasma parameters. The emphasis of this paper is put on those particle diagnostics which are used to study details of the ion velocity distribution in the core of the plasma. These incl ude neutral particle analysis (active and passive), charge-exchange re combination spectroscopy and Rutherford scattering.