Observation of strong emission from Ne IX and NeX transitions in a laser-driven plasma

Journal Article · Mon May 01 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.47970· OSTI ID:21153852

Crane, John K; Ditmire, Todd; Nguyen, Hoang; Perry, Michael D ^[1]

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1. Lawrence Livermore National Laboratory, L-493, P. O. Box 808, Livermore, CA 94550 (United States)

We observe strong emission from the 1s{sup 2}-1snp Rydberg series in He-like neon and from the Lyman-{alpha} transition in H-like neon. These emissions are observed when 1.05 {mu}m light from a 650 femtosecond laser is focused into the dense, localized output of a pulsed, supersonic nozzle. The maximum focal irradiance of our laser was measured at full power in a vacuum to be 2x10{sup 18} W/cm{sup 2}. Although emissions from lower charge states such as Ne{sup 6+} and Ne{sup 7+} closely follow rates predicted by tunneling theory, emissions from Ne{sup 8+} and Ne{sup 9+} are observed at irradiances two orders of magnitude below tunneling theory estimates (e.g., the He-{alpha} line appears at 2x10{sup 17} W/cm{sup 2}). We discuss the origins of these anomalously high charge states and the implications to recombination-pumped x-ray lasers.

• OSTI ID: 21153852
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 332; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGE STATES
LASER-PRODUCED PLASMA
LYMAN LINES
MULTICHARGED IONS
NEON IONS
PHOTON EMISSION
RADIANT FLUX DENSITY
RECOMBINATION
RYDBERG STATES
TUNNEL EFFECT
X-RAY LASERS