Influence of the number of atomic levels on the modelling of collisional x-ray lasers

F. De Dortan; M. Busquet; A. Bar-Shalom; M. Klapisch; J. Oreg; B. Rus; M. Kozlova; J. Nejdl

doi:10.1007/978-1-4020-9924-3_26

Influence of the number of atomic levels on the modelling of collisional x-ray lasers

F. De Dortan
, M. Busquet
, A. Bar-Shalom
, M. Klapisch
, J. Oreg
, B. Rus
, M. Kozlova
, J. Nejdl

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

The number of atomic excited levels considered in codes modelling X-ray lasers is generally very limited. A few dozens or even two or three are considered while thousands times more do exist. We compute populations, gain and spectra with tens of thousands of levels out of equilibrium to model a Zinc Ne-like X-ray laser. The maximum gain, its thermodynamic conditions as well as the transverse spectrum compare well with the experiment. The gain is marginally reduced for stationary plasmas when the number of levels increases. But the radiative losses are strongly enhanced for thick plasmas. For transient schemes, some neighbouring levels are strongly coupled with the lasing levels and will modify the solution of the Maxwell Bloch equations in case of seeding with high harmonics.

Original language	English
Title of host publication	X-Ray Lasers 2008 - Proceedings of the 11th International Conference
Editors	Ciaran L.S. Lewis, Dave Riley
Publisher	Springer Science and Business Media, LLC
Pages	231-238
Number of pages	8
ISBN (Print)	9781402099236
DOIs	https://doi.org/10.1007/978-1-4020-9924-3_26
State	Published - 2009
Externally published	Yes
Event	11th International Conference on X-Ray Lasers, 2008 - Belfast, United Kingdom Duration: 17 Aug 2008 → 22 Aug 2008

Publication series

Name	Springer Proceedings in Physics
Volume	130
ISSN (Print)	0930-8989
ISSN (Electronic)	1867-4941

Conference

Conference	11th International Conference on X-Ray Lasers, 2008
Country/Territory	United Kingdom
City	Belfast
Period	17/08/08 → 22/08/08

Bibliographical note

Publisher Copyright:
© 2009, Springer Science and Business Media, LLC. All rights reserved.

Access to Document

10.1007/978-1-4020-9924-3_26

Cite this

De Dortan, F., Busquet, M., Bar-Shalom, A., Klapisch, M., Oreg, J., Rus, B., Kozlova, M., & Nejdl, J. (2009). Influence of the number of atomic levels on the modelling of collisional x-ray lasers. In C. L. S. Lewis, & D. Riley (Eds.), X-Ray Lasers 2008 - Proceedings of the 11th International Conference (pp. 231-238). (Springer Proceedings in Physics; Vol. 130). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-1-4020-9924-3_26

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title = "Influence of the number of atomic levels on the modelling of collisional x-ray lasers",

abstract = "The number of atomic excited levels considered in codes modelling X-ray lasers is generally very limited. A few dozens or even two or three are considered while thousands times more do exist. We compute populations, gain and spectra with tens of thousands of levels out of equilibrium to model a Zinc Ne-like X-ray laser. The maximum gain, its thermodynamic conditions as well as the transverse spectrum compare well with the experiment. The gain is marginally reduced for stationary plasmas when the number of levels increases. But the radiative losses are strongly enhanced for thick plasmas. For transient schemes, some neighbouring levels are strongly coupled with the lasing levels and will modify the solution of the Maxwell Bloch equations in case of seeding with high harmonics.",

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De Dortan, F, Busquet, M, Bar-Shalom, A, Klapisch, M, Oreg, J, Rus, B, Kozlova, M & Nejdl, J 2009, Influence of the number of atomic levels on the modelling of collisional x-ray lasers. in CLS Lewis & D Riley (eds), X-Ray Lasers 2008 - Proceedings of the 11th International Conference. Springer Proceedings in Physics, vol. 130, Springer Science and Business Media, LLC, pp. 231-238, 11th International Conference on X-Ray Lasers, 2008, Belfast, United Kingdom, 17/08/08. https://doi.org/10.1007/978-1-4020-9924-3_26

Influence of the number of atomic levels on the modelling of collisional x-ray lasers. / De Dortan, F.; Busquet, M.; Bar-Shalom, A. et al.
X-Ray Lasers 2008 - Proceedings of the 11th International Conference. ed. / Ciaran L.S. Lewis; Dave Riley. Springer Science and Business Media, LLC, 2009. p. 231-238 (Springer Proceedings in Physics; Vol. 130).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - The number of atomic excited levels considered in codes modelling X-ray lasers is generally very limited. A few dozens or even two or three are considered while thousands times more do exist. We compute populations, gain and spectra with tens of thousands of levels out of equilibrium to model a Zinc Ne-like X-ray laser. The maximum gain, its thermodynamic conditions as well as the transverse spectrum compare well with the experiment. The gain is marginally reduced for stationary plasmas when the number of levels increases. But the radiative losses are strongly enhanced for thick plasmas. For transient schemes, some neighbouring levels are strongly coupled with the lasing levels and will modify the solution of the Maxwell Bloch equations in case of seeding with high harmonics.

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De Dortan F, Busquet M, Bar-Shalom A, Klapisch M, Oreg J, Rus B et al. Influence of the number of atomic levels on the modelling of collisional x-ray lasers. In Lewis CLS, Riley D, editors, X-Ray Lasers 2008 - Proceedings of the 11th International Conference. Springer Science and Business Media, LLC. 2009. p. 231-238. (Springer Proceedings in Physics). doi: 10.1007/978-1-4020-9924-3_26

Influence of the number of atomic levels on the modelling of collisional x-ray lasers

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