Lasing on the 3{ital d}{r_arrow}3{ital p} neonlike x-ray laser transitions driven by a self-photo-pumping mechanism
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
This paper presents an x-ray laser mechanism that uses radiation trapping of the strongest 3{ital d}{sup 1}{ital P}{sub 1}{r_arrow}2{ital p}{sup 1}{ital S}{sub 0} neonlike resonance line in an optically thick plasma to create an intense radiation field that radiatively drives population from the neonlike ground state to the 3{ital d}{sup 1}{ital P}{sub 1} state, which then lases to the 3{ital p}{sup 1}{ital P}{sub 1} and 3{ital p}{sup 3}{ital P}{sub 1} states. Collisional mixing of the 3{ital p} states with nearby 3{ital s} and 3{ital d} states depopulates the lower laser states. Modeling is presented for this mechanism in neonlike argon. Strong gain is predicted on the two 3{ital d}{r_arrow}3{ital p} transitions at 451 and 465 A, the first of which has been observed in recent x-ray laser experiments using an argon gas puff. This pumping mechanism also enhances the population of the 3{ital p}{sup 1}{ital S}{sub 0} state and the gain of the two 3{ital p}{r_arrow}3{ital s}, {ital J}=0{r_arrow}1 transitions, which are at 431 and 469 A in argon. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 284342
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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