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- W142245736 abstract "We have used the PISCES-A facility in order to study the behavior of carbon containing molecules in a representative plasma with parameters close to that of a tokamak boundary layer, CH{sub 4}, C{sub 2}H{sub 2}, C{sub 2}H{sub 4}, CO, and CO{sub 2} molecules were introduced through a slit aperture into a helium plasma and the radiation from these due to electronic excitation was spectrographically recorded. The imaging of the plasma onto the entrance slit of a 1.33m McPherson optical spectrometer was chosen in such a way that simultaneous information about spectral and spatial distribution of the emission could be obtained by an attached photographic camera and an optical multichannel analyser (OMA). The recorded spectra show that many features in previously obtained spectra from limiters originate -- beside from hydrocarbons -- from carbonoxides, which seem to play a major role in the transport of carbon and oxygen. It was also possible to calibrate the radiation intensity of several molecular bands versus the known molecular influx so that an absolute determination of these fluxes from the wall of a fusion device could be done. Measurements of the attenuation of the individual species were carried out, which describe the penetration of carbon, oxygen,more » and hydrogen atoms into a discharge by taking into account individual steps in the molecular breakup process. 36 refs., 35 figs.« less" @default.
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- W142245736 date "1989-12-01" @default.
- W142245736 modified "2023-10-14" @default.
- W142245736 title "Spectroscopic studies of carbon containing molecules and their break-up in PISCES-A" @default.
- W142245736 doi "https://doi.org/10.2172/6472756" @default.
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