Stimulated Raman scattering, two-plasmon decay, and hot electron generation from underdense plasmas at 0.35 μm

Figueroa, H.; Joshi, C.; Azechi, H.; Ebrahim, N. A.; Estabrook, K. G.

doi:10.1063/1.864801

Cited by 113 publications

(19 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1,2 The main impact of these electrons in laserfusion experiments is the possible preheat of the fuel that can reduce the effectiveness of the implosion. We study the preheat due to these electrons by measuring the K␣ line emission from high-Z layers in a planar-target geometry on the OMEGA 3 laser system.…”

Section: Introductionmentioning

confidence: 99%

Measurement of preheat due to fast electrons in laser implosions

et al. 2000

View full text Add to dashboard Cite

Fast electrons due to the two-plasmon decay instability have been shown to be generated in laser interaction experiments. The purpose of the present experiment is to determine the preheat level due to these electrons, using the Kα emission from a two-layer, Ti–V, planar target. The target is designed to separate the contributions of fast electrons and radiation to the observed Kα intensity. About 0.3% of the incident laser energy is found to be deposited as preheat due to fast electrons. It is shown that the preheat level can alternatively be determined directly from the hard x-ray continuum without the need to know the electron dynamics; the only required parameters are the total energy in hard x rays and the temperature of the fast electrons.

show abstract

Section: Introductionmentioning

confidence: 99%

Measurement of preheat due to fast electrons in laser implosions

et al. 2000

View full text Add to dashboard Cite

show abstract

“…Previous experiments have observed SQSR backscatter 3 -6 or have observed SQSR sidescatter that was orders of magnitude less efficient. 7 Other experiments, using l-/xm irradiation, either did not measure the angular distribution 8 or did not determine the scattering mechanism. 9 Second, the total SQSR yield (up to several percent) is at least three orders of magnitude larger than has been reported from previous experiments using solid targets.…”

mentioning

confidence: 99%

Efficient Raman Sidescatter and Hot-Electron Production in Laser-Plasma Interaction Experiments

et al. 1984

View full text Add to dashboard Cite

These experiments studied the Raman instability occurring at densities below the quartercritical density of the incident 0.53-ju,m laser light. Solid gold targets were irradiated by up to 4 kJ of energy in a 1-ns pulse with focal spots of 150 to 1880 /xm. The angular distribution of the Raman scattering shows efficient Raman sidescatter. The energy in electron plasma waves accounts for the hot-electron production over almost three orders of magnitude. We report the results and discuss the implications for laser fusion.

show abstract

“…Electrons can be accelerated to high energies by the two-plasmon decay (TPD) instability [7] in which the incident electromagnetic wave decays into two electron plasma waves [8][9][10]. The instability grows rapidly through the resonant coupling of the electric field of the incident laser beam and the longitudinal electrostatic field of the two electron plasma waves.…”

mentioning

confidence: 99%