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Proceedings Paper

Ionization yield in a three-step photoionization process of an optically thick atomic column: numerical modelization and experiments in atomic thulium
Author(s): Philippe Kupecek; M. Comte; Jacques De Lamare; Alain Denis Petit
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Paper Abstract

Among the mainly interesting parameters of an atomic vapor laser isotope separation process is the ionization yield. This parameter can be controlled as long as the laser beam spatial intensity distribution and temporal shape are well defined and not subjected to unexpected disturbing effects such as coherent propagation phenomena, leading to spatial and temporal reshaping with hot spots and pulse lengthening and delays. On the other hand, economical considerations require optically thick atomic columns which can favor such effects. In this work, we study the photoionization yield in atomic thulium vapor when propagation effects occur. We compare our experimental results with those of a coherent propagation code describing a four level system and including inhomogeneous broadening as well as degeneracies. We choose a three step photoionization scheme.

Paper Details

Date Published: 28 May 1993
PDF: 7 pages
Proc. SPIE 1859, Laser Isotope Separation, (28 May 1993); doi: 10.1117/12.145512
Show Author Affiliations
Philippe Kupecek, Commissariat a l'Energie Atomique (France)
M. Comte, Commissariat a l'Energie Atomique (France)
Jacques De Lamare, Commissariat a l'Energie Atomique (France)
Alain Denis Petit, Commissariat a l'Energie Atomique (France)

Published in SPIE Proceedings Vol. 1859:
Laser Isotope Separation
Jeffrey A. Paisner, Editor(s)

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