A combination of laser instrumentation for diagnostics of a high-temperature plasma by the resonance fluorescence method

The use of the resonance fluorescence method has permitted making direct local measurements of the concentration and the temperature of different atoms and ions. The high sensitivity and good localizability of the method were first confirmed experimentally in [i]. A concentration of hydrogen atoms N: = 4.5.10 e cm -3 has been measured on the axis of the plasma sheath in the chamber of the Tokamak FT-I apparatus, and its radial distribution and variation during the current pulse have been found.