Coherent and incoherent XUV emission in helium and neon, laser-driven plasmas

Author

Crane, John K. ; Perry, Michael D. ; Strickland, Donna ; Herman, Steve ; Falcone, Roger W.

Author_Institution

Lawrence Livermore Nat. Lab., California Univ., CA, USA

Volume

21

Issue

1

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

82

Lastpage

89

Abstract

The authors present results of measurements of high-order harmonic generation and XUV spontaneous emission in helium and neon plasmas excited by a short pulse laser at intensities between 10¹⁴ and 5×10¹⁷ W/cm². They compare the observed behavior of the harmonics with recent single atom calculations in helium. A wavelength dependence to the efficiency of harmonic generation that has not been previously reported is observed. Line emission from excited state transitions in Ne⁷⁺ in a short pulse laser-driven plasma is also observed. In particular, strong emission and a rapid recombination rate for the 9.8-nm (3d-2p) transition that is a possible candidate for a recombination-pumped X-ray laser is shown

Keywords

X-ray lasers; helium; laser transitions; light propagation in plasma; neon; optical harmonic generation; plasma diagnostics by laser beam; plasma production and heating by laser beam; 3d-2p transition; 9.8 nm; He; Ne; Ne⁷⁺; XUV emission; excited state transitions; high-order harmonic generation; laser-driven plasmas; recombination rate; recombination-pumped X-ray laser; short pulse laser-driven plasma; spontaneous emission; wavelength dependence; Frequency conversion; Helium; Laser excitation; Laser transitions; Optical pulse generation; Plasma measurements; Plasma waves; Pulse measurements; Spontaneous emission; X-ray lasers;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.221105

Filename

221105