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

SYSNO ASEP	0334086
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Influence of the number of atomic levels on the modelling of collisional X-ray lasers
Title	Vliv počtu atomových hladin na modelování srážkových RTG laserů
Author(s)	de Dortan, F. (FR) Busquet, M. (FR) Bar-Shalom, A. (US) Klapisch, M. (US) Oreg, J. (US) Rus, Bedřich (FZU-D)_ORCID Kozlová, Michaela (FZU-D)_{RID, ORCID} Nejdl, Jaroslav (FZU-D)_{RID, ORCID}
Number of authors	8
Source Title	X-Ray Lasers 2008. - Dordrecht : Springer, 2009 / Ciaran L. ; Riley D - ISBN 978-1-4020-9923-6
Pages	s. 231-237
Number of pages	7 s.
Action	International Conference on X-Ray Lasers /11th./
Event date	17.08.2008-22.08.2008
VEvent location	Belfast
Country	GB - United Kingdom
Event type	WRD
Language	eng - English
Country	NL - Netherlands
Keywords	modelling of X-ray lasers ; atomic levels ; population ; gain ; spectra ; transient schema
Subject RIV	BH - Optics, Masers, Lasers
R&D Projects	KAN300100702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GA202/08/1734 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100523 - FZU-D (2005-2011)
Annotation	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.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2010

Number of the records: 1