抄録
Applications of the hydrogen molecular spectroscopy in the visible region to fusion edge/divertor plasmas are reviewed. Molecular hydrogen in low temperature plasma, not only as a fuelling gas but also as recycling or buffer gas in gas-target divertor, plays important roles in determining the particle source and recombination phenomena. Moreover the molecular hydrogen modifies the spectral intensity and profile of the hydrogen Balmer series. Since their quantitative contributions depends much on the vibrational distribution in the ground electronic state, molecular spectroscopy for Fulcher band emissions combined with some proper excitation-emission models has been developed. Principle, spectroscopic system, method for the analysis and some results are shown. Other possibility of the Fulcher band spectroscopy is briefly mentioned.
