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

Technical Report · Fri Jul 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10192628· OSTI ID:10192628

Crane, J K; Ditmire, T; Nguyen, H; Perry, M D

The authors 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 the 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 order of magnitude below tunneling theory estimates (e.g. the He-{alpha} line appears at 2 {times} 10{sup 17} W/cm{sup 2}). They discuss the origins of these anomalously high charge states and the implications to recombination-pumped x-rays lasers.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10192628
• Report Number(s): UCRL-JC--116774; CONF-940592--8; ON: DE95002265
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002
DESIGN
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
FLUORESCENCE
LASER-PRODUCED PLASMA
LASERS AND MASERS
LYMAN LINES
MULTICHARGED IONS
NEODYMIUM LASERS
NEON IONS
X RADIATION
X-RAY LASERS