Improvements to the RADIOM non-LTE model

M. Busquet; D. Colombant; M. Klapisch; D. Fyfe; J. Gardner

doi:10.1016/j.hedp.2009.05.005

Improvements to the RADIOM non-LTE model

M. Busquet^*
, D. Colombant
, M. Klapisch
, D. Fyfe
, J. Gardner

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

In 1993, we proposed the RADIOM model [M. Busquet, Phys. Fluids 85 (1993) 4191] where an ionization temperature T_z is used to derive non-LTE properties from LTE data. T_z is obtained from an "extended Saha equation" where unbalanced transitions, like radiative decay, give the non-LTE behavior. Since then, major improvements have been made. T_z has been shown to be more than a heuristic value, but describes the actual distribution of excited and ionized states and can be understood as an "effective temperature". Therefore we complement the extended Saha equation by introducing explicitly the auto-ionization/dielectronic capture. Also we use the SCROLL model to benchmark the computed values of T_z.

Original language	English
Pages (from-to)	270-275
Number of pages	6
Journal	High Energy Density Physics
Volume	5
Issue number	4
DOIs	https://doi.org/10.1016/j.hedp.2009.05.005
State	Published - Dec 2009
Externally published	Yes

Keywords

Non-LTE
RADIOM

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10.1016/j.hedp.2009.05.005

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title = "Improvements to the RADIOM non-LTE model",

abstract = "In 1993, we proposed the RADIOM model [M. Busquet, Phys. Fluids 85 (1993) 4191] where an ionization temperature Tz is used to derive non-LTE properties from LTE data. Tz is obtained from an {"}extended Saha equation{"} where unbalanced transitions, like radiative decay, give the non-LTE behavior. Since then, major improvements have been made. Tz has been shown to be more than a heuristic value, but describes the actual distribution of excited and ionized states and can be understood as an {"}effective temperature{"}. Therefore we complement the extended Saha equation by introducing explicitly the auto-ionization/dielectronic capture. Also we use the SCROLL model to benchmark the computed values of Tz.",

keywords = "Non-LTE, RADIOM",

author = "M. Busquet and D. Colombant and M. Klapisch and D. Fyfe and J. Gardner",

year = "2009",

month = dec,

doi = "10.1016/j.hedp.2009.05.005",

language = "אנגלית",

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journal = "High Energy Density Physics",

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TY - JOUR

T1 - Improvements to the RADIOM non-LTE model

AU - Busquet, M.

AU - Colombant, D.

AU - Klapisch, M.

AU - Fyfe, D.

AU - Gardner, J.

PY - 2009/12

Y1 - 2009/12

N2 - In 1993, we proposed the RADIOM model [M. Busquet, Phys. Fluids 85 (1993) 4191] where an ionization temperature Tz is used to derive non-LTE properties from LTE data. Tz is obtained from an "extended Saha equation" where unbalanced transitions, like radiative decay, give the non-LTE behavior. Since then, major improvements have been made. Tz has been shown to be more than a heuristic value, but describes the actual distribution of excited and ionized states and can be understood as an "effective temperature". Therefore we complement the extended Saha equation by introducing explicitly the auto-ionization/dielectronic capture. Also we use the SCROLL model to benchmark the computed values of Tz.

AB - In 1993, we proposed the RADIOM model [M. Busquet, Phys. Fluids 85 (1993) 4191] where an ionization temperature Tz is used to derive non-LTE properties from LTE data. Tz is obtained from an "extended Saha equation" where unbalanced transitions, like radiative decay, give the non-LTE behavior. Since then, major improvements have been made. Tz has been shown to be more than a heuristic value, but describes the actual distribution of excited and ionized states and can be understood as an "effective temperature". Therefore we complement the extended Saha equation by introducing explicitly the auto-ionization/dielectronic capture. Also we use the SCROLL model to benchmark the computed values of Tz.

KW - Non-LTE

KW - RADIOM

UR - https://www.scopus.com/pages/publications/70350570546

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DO - 10.1016/j.hedp.2009.05.005

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AN - SCOPUS:70350570546

SN - 1574-1818

VL - 5

SP - 270

EP - 275

JO - High Energy Density Physics

JF - High Energy Density Physics

IS - 4

ER -

Improvements to the RADIOM non-LTE model

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Keywords

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