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:69018

Crane, J K; Ditmire, T; Nguyen, H; Perry, M D ^[1]

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1. Lawrence Livermore National Laboratory, L-493, P. O. Box 808, Livermore, California 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 2{times}10{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 2{times}10{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. {copyright} {ital 1994} {ital American} {ital Institute} {ital of} {ital Physics}.

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 69018
• Report Number(s): CONF-940592--
• 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

42 ENGINEERING
66 PHYSICS
CHARGE STATES
EXCITATION
LASER-PRODUCED PLASMA
MULTICHARGED IONS
NEON IONS
PULSE TECHNIQUES
TUNNEL EFFECT
X-RAY EMISSION ANALYSIS