Dielectronic recombination of lanthanide and low ionization state tungsten ions: W13+ - W+

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Abstract

The experimental thermonuclear reactor, ITER, is currently being constructed in Cadarache, France. The reactor vessel will be constructred with a beryllium coated wall, and a tungsten coated divertor. As a plasma-facing component, the divertor will be under conditions of extreme temperature, resulting in the sputtering of tungsten impurities into the main body plasma. Modelling and understanding the potential cooling effects of these impurities requires detailed collisional-radiative modelling. These models require a wealth of atomic data for the various atomic species in the plasma. In particular, partial, final-state resolved dielectronic/radiative recombination (DR/RR) rate coefficients for tungsten are required. In this manuscript, we present our calculations of detailed DR/RR rate coefficients for the lanthanide-like, and low ionization stages of tungsten, spanning charge states W$^{13+}$ to W$^{1+}$. The calculations presented here constitutes the first detailed exploration of such low ionization state tungsten ions. We are able to reproduce the general trend of calculations performed by other authors, but find significant differences ours and their DR rate coefficients, especially at the lowest temperatures considered.
LanguageEnglish
Article number025201
Number of pages23
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume52
Issue number2
DOIs
Publication statusPublished - 14 Dec 2018

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tungsten
ionization
radiative recombination
ions
coefficients
reactors
impurities
beryllium
France
vessels
sputtering
trends
cooling
temperature

Keywords

  • thermonuclear reactor
  • beryllium
  • tungsten

Cite this

@article{2a8b21fc0fb840c69df9be5778252d6b,
title = "Dielectronic recombination of lanthanide and low ionization state tungsten ions: W13+ - W+",
abstract = "The experimental thermonuclear reactor, ITER, is currently being constructed in Cadarache, France. The reactor vessel will be constructred with a beryllium coated wall, and a tungsten coated divertor. As a plasma-facing component, the divertor will be under conditions of extreme temperature, resulting in the sputtering of tungsten impurities into the main body plasma. Modelling and understanding the potential cooling effects of these impurities requires detailed collisional-radiative modelling. These models require a wealth of atomic data for the various atomic species in the plasma. In particular, partial, final-state resolved dielectronic/radiative recombination (DR/RR) rate coefficients for tungsten are required. In this manuscript, we present our calculations of detailed DR/RR rate coefficients for the lanthanide-like, and low ionization stages of tungsten, spanning charge states W$^{13+}$ to W$^{1+}$. The calculations presented here constitutes the first detailed exploration of such low ionization state tungsten ions. We are able to reproduce the general trend of calculations performed by other authors, but find significant differences ours and their DR rate coefficients, especially at the lowest temperatures considered.",
keywords = "thermonuclear reactor, beryllium, tungsten",
author = "Preval, {S. P.} and Badnell, {N. R.} and O'Mullane, {M. G.}",
year = "2018",
month = "12",
day = "14",
doi = "10.1088/1361-6455/aaf3f4",
language = "English",
volume = "52",
journal = "Journal of Physics B: Atomic, Molecular and Optical Physics",
issn = "0953-4075",
number = "2",

}

TY - JOUR

T1 - Dielectronic recombination of lanthanide and low ionization state tungsten ions

T2 - Journal of Physics B: Atomic, Molecular and Optical Physics

AU - Preval, S. P.

AU - Badnell, N. R.

AU - O'Mullane, M. G.

PY - 2018/12/14

Y1 - 2018/12/14

N2 - The experimental thermonuclear reactor, ITER, is currently being constructed in Cadarache, France. The reactor vessel will be constructred with a beryllium coated wall, and a tungsten coated divertor. As a plasma-facing component, the divertor will be under conditions of extreme temperature, resulting in the sputtering of tungsten impurities into the main body plasma. Modelling and understanding the potential cooling effects of these impurities requires detailed collisional-radiative modelling. These models require a wealth of atomic data for the various atomic species in the plasma. In particular, partial, final-state resolved dielectronic/radiative recombination (DR/RR) rate coefficients for tungsten are required. In this manuscript, we present our calculations of detailed DR/RR rate coefficients for the lanthanide-like, and low ionization stages of tungsten, spanning charge states W$^{13+}$ to W$^{1+}$. The calculations presented here constitutes the first detailed exploration of such low ionization state tungsten ions. We are able to reproduce the general trend of calculations performed by other authors, but find significant differences ours and their DR rate coefficients, especially at the lowest temperatures considered.

AB - The experimental thermonuclear reactor, ITER, is currently being constructed in Cadarache, France. The reactor vessel will be constructred with a beryllium coated wall, and a tungsten coated divertor. As a plasma-facing component, the divertor will be under conditions of extreme temperature, resulting in the sputtering of tungsten impurities into the main body plasma. Modelling and understanding the potential cooling effects of these impurities requires detailed collisional-radiative modelling. These models require a wealth of atomic data for the various atomic species in the plasma. In particular, partial, final-state resolved dielectronic/radiative recombination (DR/RR) rate coefficients for tungsten are required. In this manuscript, we present our calculations of detailed DR/RR rate coefficients for the lanthanide-like, and low ionization stages of tungsten, spanning charge states W$^{13+}$ to W$^{1+}$. The calculations presented here constitutes the first detailed exploration of such low ionization state tungsten ions. We are able to reproduce the general trend of calculations performed by other authors, but find significant differences ours and their DR rate coefficients, especially at the lowest temperatures considered.

KW - thermonuclear reactor

KW - beryllium

KW - tungsten

U2 - 10.1088/1361-6455/aaf3f4

DO - 10.1088/1361-6455/aaf3f4

M3 - Article

VL - 52

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

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

SN - 0953-4075

IS - 2

M1 - 025201

ER -