Advances in atomic data for plasma diagnostics

L. Fernández-Menchero, G. del Zanna, N. R. Badnell

Research output: Contribution to journalConference Contribution

Abstract

We present sets of new atomic data for astrophysical and fusion plasma diagnostics. We calculate electron-impact excitation collision strengths and effective collisions strengths for the Be- and Mg-like isoelectronic sequences up to Krq+. We use the R-Matrix Intermediate-Coupling Frame Transformation method. We also study the accuracy of calculations for highly-excited states and give extrapolation rules to estimate the effective collision strengths and their error at high n. We demonstrate the importance of a well converged CI/CC expansion in the R-matrix calculation to get good quality results, mainly for highly-excited states.

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plasma diagnostics
collisions
excitation
isoelectronic sequence
electron impact
extrapolation
astrophysics
fusion
expansion
estimates

Keywords

  • atoms
  • electric excitation
  • excited states
  • impact ionization
  • linear transformations
  • matrix algebra
  • plasma diagnostics
  • collision strength
  • electron-impact excitation
  • fusion plasma diagnostics
  • highly excited state
  • intermediate coupling
  • isoelectronic sequence
  • R-matrix calculation
  • transformation methods
  • collisional plasmas

Cite this

Fernández-Menchero, L. ; del Zanna, G. ; Badnell, N. R. / Advances in atomic data for plasma diagnostics. In: Journal of Physics: Conference Series . 2015 ; Vol. 635, No. 5.
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abstract = "We present sets of new atomic data for astrophysical and fusion plasma diagnostics. We calculate electron-impact excitation collision strengths and effective collisions strengths for the Be- and Mg-like isoelectronic sequences up to Krq+. We use the R-Matrix Intermediate-Coupling Frame Transformation method. We also study the accuracy of calculations for highly-excited states and give extrapolation rules to estimate the effective collision strengths and their error at high n. We demonstrate the importance of a well converged CI/CC expansion in the R-matrix calculation to get good quality results, mainly for highly-excited states.",
keywords = "atoms, electric excitation, excited states, impact ionization, linear transformations, matrix algebra, plasma diagnostics, collision strength, electron-impact excitation, fusion plasma diagnostics, highly excited state, intermediate coupling, isoelectronic sequence, R-matrix calculation, transformation methods, collisional plasmas",
author = "L. Fern{\'a}ndez-Menchero and {del Zanna}, G. and Badnell, {N. R.}",
year = "2015",
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Advances in atomic data for plasma diagnostics. / Fernández-Menchero, L.; del Zanna, G.; Badnell, N. R.

In: Journal of Physics: Conference Series , Vol. 635, No. 5, 052035, 07.09.2015.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - Advances in atomic data for plasma diagnostics

AU - Fernández-Menchero, L.

AU - del Zanna, G.

AU - Badnell, N. R.

PY - 2015/9/7

Y1 - 2015/9/7

N2 - We present sets of new atomic data for astrophysical and fusion plasma diagnostics. We calculate electron-impact excitation collision strengths and effective collisions strengths for the Be- and Mg-like isoelectronic sequences up to Krq+. We use the R-Matrix Intermediate-Coupling Frame Transformation method. We also study the accuracy of calculations for highly-excited states and give extrapolation rules to estimate the effective collision strengths and their error at high n. We demonstrate the importance of a well converged CI/CC expansion in the R-matrix calculation to get good quality results, mainly for highly-excited states.

AB - We present sets of new atomic data for astrophysical and fusion plasma diagnostics. We calculate electron-impact excitation collision strengths and effective collisions strengths for the Be- and Mg-like isoelectronic sequences up to Krq+. We use the R-Matrix Intermediate-Coupling Frame Transformation method. We also study the accuracy of calculations for highly-excited states and give extrapolation rules to estimate the effective collision strengths and their error at high n. We demonstrate the importance of a well converged CI/CC expansion in the R-matrix calculation to get good quality results, mainly for highly-excited states.

KW - atoms

KW - electric excitation

KW - excited states

KW - impact ionization

KW - linear transformations

KW - matrix algebra

KW - plasma diagnostics

KW - collision strength

KW - electron-impact excitation

KW - fusion plasma diagnostics

KW - highly excited state

KW - intermediate coupling

KW - isoelectronic sequence

KW - R-matrix calculation

KW - transformation methods

KW - collisional plasmas

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UR - http://www.icpeac2015.com/

U2 - 10.1088/1742-6596/635/5/052035

DO - 10.1088/1742-6596/635/5/052035

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JO - Journal of Physics: Conference Series

T2 - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 5

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ER -