Molecular Diagnostics of Cold Edge Plasmas

摘要: The presence of molecules in cold edge plasmas requires detailed investigations on the basis simple diagnostic methods. For this purposes, powerful tool molecular emission spectroscopy visible spectral range is introduced. Applications to divertor fusion experiments (AS-DEX Upgrade) are shown. Special emphasis given role hydrogen these low temperature plasmas. combination with a collisional-radiative model and plasma code 2D modeling offers possibility investigate interplay detached regimes, i.e., volume recombination. In particular, importance vibrational population discussed. Hydrocarbons, which formed by chemical erosion processes carbon tiles divertor, also accessible optical spectroscopy. method determine fluxes hydrocarbons introduced applications higher (C 2 H y ) Furthermore, systematic measurements yields pressure discussed can improve understanding enhanced mechanisms