Journal article

Publication year: 2017

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Volume number: 50

Issue number: 5

ISSN: 0953-4075

eISSN: 1361-6455

Open access status: Green

DOI Link: https://doi.org/10.1088/1361-6455/aa547d

Publisher: IOP Publishing

Abstract: 
We review experimental and theoretical efforts aimed at a detailed understanding of the recombination of electrons with highly charged tungsten ions characterised by an open 4f sub-shell. Highly charged tungsten occurs as a plasma contaminant in ITER-like tokamak experiments, where it acts as an unwanted cooling agent. Modelling of the charge state populations in a plasma requires reliable thermal rate coefficients for charge-changing electron collisions. The electron recombination of medium-charged tungsten species with open 4f sub-shells is especially challenging to compute reliably. Storage-ring experiments have been conducted that yielded recombination rate coefficients at high energy resolution and well-understood systematics. Significant deviations compared to simplified, but prevalent, computational models have been found. A new class of ab initio numerical calculations has been developed that provides reliable predictions of the total plasma recombination rate coefficients for these ions.

Harvard Citation style: Krantz, C., Badnell, N., Mueller, A., Schippers, S. and Wolf, A. (2017) Recombination of open-f-shell tungsten ions, Journal of Physics B: Atomic, Molecular and Optical Physics, 50(5), Article 052001. https://doi.org/10.1088/1361-6455/aa547d

APA Citation style: Krantz, C., Badnell, N., Mueller, A., Schippers, S., & Wolf, A. (2017). Recombination of open-f-shell tungsten ions. Journal of Physics B: Atomic, Molecular and Optical Physics. 50(5), Article 052001. https://doi.org/10.1088/1361-6455/aa547d