The use of atomic and molecular data in fusion plasma diagnostics
This paper describes two cases: the first is neutral deuterium beam attenuation and beam emission and its linking to active diagnostic spectroscopy using beams. A description is given of how the diagnostic analysis and experimental data reduction are carried out efficiently using derived effective stopping and effective emission coefficients. The organization of the fundamental ion/atom data is described and the generation of the effective coefficients from collisional-radiative modelling. The second case is the more general task of modelling ionization state, power and impurity line emission for interpretation of divertor observations. The matching of effective collisional-radiative coefficients to the divertor plasma models is explained and of photon emission coefficients to the post-processing for particular spectrometers and lines-of-sight. The generalized collisional-radiative model, which prepares the effective coefficients, is described and an explanation given of how it gives proper attention to the dynamic nature and non-negligible density of the divertor plasma and why resolution of metastable states is a requirement.
Bibliographic Reference: Report: JET-P(97)35 EN (1997) 29pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon, OX14 3DB (GB)
Record Number: 199810153 / Last updated on: 1998-02-12
Original language: en
Available languages: en