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In situ sensitivity calibration of an XUV spectrometer for plasma spectroscopy: Branching ratio method and collisional-radiative model

1995; American Institute of Physics; Volume: 66; Issue: 2 Linguagem: Inglês

10.1063/1.1146042

1527-2400

Tetsuya Kawachi, Hidetoshi Suemitsu, K. Sawada, Takashi Fujimoto, T. Maehara, S. Yoshimura, Takashi Maekawa, Y. Terumichi,

Mass Spectrometry Techniques and Applications

We have observed spectra of lithium-like oxygen and carbon ions from the WT-3 tokamak plasma with an XUV spectrometer. On the basis of the branching ratios to visible UV spectral lines and the collisional-radiative model calculation for excited level populations, we have determined the absolute sensitivity of the spectrometer from 11.5 through 31.2 nm. From the line intensities emitted from the scrape-off layer plasma, we have estimated the charge exchange recombination rate coefficients of helium-like oxygen ions colliding with neutral hydrogen atoms or molecules.