Partial and total dielectronic recombination rate coefficients for W73+ to W56+
Preval, S. P. and Badnell, N. R. and O'Mullane, M. G. (2016) Partial and total dielectronic recombination rate coefficients for W73+ to W56+. Physical Review A, 93 (4). 042703. ISSN 1050-2947 (https://doi.org/10.1103/PhysRevA.93.042703)
Preview |
Text.
Filename: Preval_etal_PRA_2016_Partial_and_total_dielectronic_recombination_rate_coefficients.pdf
Final Published Version License: Download (2MB)| Preview |
Abstract
Dielectronic recombination (DR) is a key atomic process which affects the spectroscopic diagnostic modelling of tungsten, most of whose ionization stages will be found somewhere in the ITER fusion reactor: in the edge, divertor, or core plasma. Accurate DR data is sparse while complete DR coverage is unsophisticated (e.g. average-atom or Burgess General Formula) as illustrated by the large uncertainties which currently exist in the tungsten ionization balance. To this end, we present a series of partial final-state-resolved and total DR rate coefficients for W$^{73+}$ to W$^{56+}$ Tungsten ions. This is part of a wider effort within {\it The Tungsten Project} to calculate accurate dielectronic recombination rate coefficients for the tungsten isonuclear sequence for use in collisional-radiative modelling of finite-density tokamak plasmas. The recombination rate coefficients have been calculated with {\sc autostructure} using kappa-averaged relativistic wavefunctions in level resolution (intermediate coupling) and configuration resolution (configuration average). The results are available from OPEN-ADAS according to the {\it adf09} and {\it adf48} standard formats. Comparison with previous calculations of total DR rate coefficients for W$^{63+}$ and W$^{56+}$ yield agreement to within 20\% and 10\%, respectively, at peak temperature. It is also seen that the J\"{u}ttner correction to the Maxwell distribution has a significant effect on the ionization balance of tungsten at the highest charge states, changing both the peak abundance temperatures and the ionization fractions of several ions.
-
-
Item type: Article ID code: 55984 Dates: DateEvent7 April 2016Published15 March 2016AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 23 Mar 2016 11:11 Last modified: 11 Apr 2024 01:03 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/55984