SPECTROSCOPY IN Ne-LIKE PLASMAS. Z-DEPENDENCE OF THE ATOMIC DATA USED IN A COLLISIONAL-RADIATIVE MODEL

AbstractThe Livermore X-ray Laser experiments in 1984 have shown the existence of Ne-like 3p-3s population inversions in a collisional Se plasma (Z=34) with significant gains (5 cm-1). We have focused our efforts on the behavior of the gains along the target neon Isoelectronic sequence. This study implies the determination of the Z-dependance of the rate coefficients of all the Involved atomic processes: collisional excitation (C). radiative decay (A) and dielectronic recombination (αd). Thus we use atomic structure and electron-ion collisional codes (SUPERSTRUCTURE. Distorted Waves. AUTOLSJ and JJOM). The different calculations have been done on a large selection of ions, from Ar to Ag. They Include relatlvistic effects in a fine structure scheme. The Z-dependance of the numerical results is expressed as polynomial or rational forms.

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PyAtomDB: Extending the AtomDB Atomic Database to Model New Plasma Processes and Uncertainties

Atoms ◽

10.3390/atoms8030049 ◽

2020 ◽

Vol 8 (3) ◽

pp. 49

Author(s):

Adam R. Foster ◽

Keri Heuer

Keyword(s):

Software Package ◽

Extreme Ultraviolet ◽

Emission Lines ◽

Atomic Data ◽

Model Calculations ◽

X Ray ◽

Hot Plasma ◽

Collisional Radiative Model ◽

Radiative Model ◽

Spectrum Generation

The AtomDB project provides models of X-ray and extreme ultraviolet emitting astrophysical spectra for optically thin, hot plasma. We present the new software package, PyAtomDB, which now underpins the entire project, providing access to the underlying database, collisional radiative model calculations, and spectrum generation for a range of models. PyAtomDB is easily extensible, allowing users to build new tools and models for use in analysis packages such as XSPEC. We present two of these, the kappa and ACX models for non-Maxwellian and Charge-Exchange plasmas respectively. In addition, PyAtomDB allows for full open access to the apec code, which underlies all of the AtomDB spectra and has enabled the development of a module for estimating the sensitivity of emission lines and diagnostic line ratios to uncertainties in the underlying atomic data. We present these publicly available tools and results for several X-ray diagnostics of Fe L-shell ions and He-like ions as examples.

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Atomic data and collisional–radiative model for beryllium and its ions

Physica Scripta ◽

10.1088/0031-8949/2014/t161/014007 ◽

2014 ◽

Vol T161 ◽

pp. 014007

Author(s):

Dmitry Kondratyev ◽

Leonid Vainshtein ◽

Igor Bray ◽

Dmitry Fursa ◽

Yuri Ralchenko

Keyword(s):

Atomic Data ◽

Collisional Radiative Model ◽

Radiative Model

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X-ray spectral diagnostics for satellite lines of H-like Mg ions measured by a high resolution spectrometer

Laser and Particle Beams ◽

10.1017/s0263034604223060 ◽

2004 ◽

Vol 22 (3) ◽

pp. 245-251 ◽

Cited By ~ 3

Author(s):

TAKAKO KATO ◽

NORIMASA YAMAMOTO ◽

FRANK B. ROSMEJ

Keyword(s):

High Resolution ◽

High Resolution Spectroscopy ◽

Atomic Data ◽

X Ray ◽

Doubly Excited States ◽

Spectral Diagnostics ◽

Collisional Radiative Model ◽

Radiative Model ◽

Intensity Ratios ◽

A New Technique

X-ray spectra of H-like Mg ions produced in a laser plasma have been measured by space-resolved high-resolution spectroscopy. We identified satellite lines near Lyα lines, 2lnl′ − 1snl′ +hν forn= 2, 3, and 4. We construct a collisional radiative model including the doubly excited states for the intensity ratios of satellite lines. We use atomic data calculated by different methods for satellite lines and compare the results. We derive the electron temperature and density of the laser-produced plasma by a new technique using intensity ratios of only satellite lines. This technique is useful because the Lyα lines are often affected by opacity.

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PyAtomDB: Extending the AtomDB Atomic Database to Model New Plasma Processes and Uncertainties

10.20944/preprints202007.0609.v1 ◽

2020 ◽

Author(s):

Adam R. Foster ◽

Keri Heuer

Keyword(s):

Open Access ◽

Software Package ◽

Emission Lines ◽

Atomic Data ◽

Model Calculations ◽

X Ray ◽

Hot Plasma ◽

Collisional Radiative Model ◽

Radiative Model ◽

Spectrum Generation

The AtomDB project provides models of X-ray and EUV emitting astrophysical spectra for optically thin, hot plasma. We present the new software package, PyAtomDB, which now underpins the entire project, providing access to the underlying database, collisional radiative model calculations, and spectrum generation for a range of models. PyAtomDB is easily extensible allowing users to build new tools and models for use in analysis packages such as XSPEC. We present two of these, the kappa and ACX models for non-Maxwellian and Charge-Exchange plasmas respectively. In addition, PyAtomDB allows full open access to the apec code which underlies all of the AtomDB spectra and has enabled development of a module for estimating the sensitivity of emission lines and diagnostic line ratios to uncertainties in the underlying atomic data. We present these publicly available tools and results for several X-ray diagnostics of Fe L-shell ions and He-like ions as examples.

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Diagnostics of Gold Laser Plasmas

International Astronomical Union Colloquium ◽

10.1017/s0252921100108085 ◽

1988 ◽

Vol 102 ◽

pp. 357-360

Author(s):

J.C. Gauthier ◽

J.P. Geindre ◽

P. Monier ◽

C. Chenais-Popovics ◽

N. Tragin ◽

...

Keyword(s):

Experimental Results ◽

Pure Gold ◽

Electronic Temperature ◽

X Ray ◽

Laser Plasmas ◽

Collisional Radiative Model ◽

Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

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