Abstract
The band structure of the A2Δ→X2Π system of the CH radical, the method of hydrocarbon flux measurement, and the modeling of hydrocarbon elementary processes are described. Reviews of recent research achievements are also presented. At JT-60U divertor plates, the chemical sputtering yields of not only CH4 but also C2Hy have been measured with simultaneous observation of the CH and C2 bands. In the MAP-II device in the University of Tokyo, hydrocarbon-enhanced molecular assisted recombination processes have been qualitatively proved by comparison of the measured and the modeled CH band intensity.
