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Three-half harmonic generation in laser-plasma interaction: Evidence for plasmon propagation (1991)

Giulietti, D. ; Biancalana, V. ; Batani, D. ; [et al.]

Springer

Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 845-858

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ISSN: 0392-6737

Keywords: Plasma production and heating by laser beams ; Waves ; oscillations and instabilities in plasma

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Summary Side emitted 3ω/2 radiation was studied by interacting 1.064 μm laser light with plasmas obtained from exploding thin foils. Both focusing (f/8) and collecting (f/7) optics were designed in order to reduce the instrumental bandwidth of the 3ω/2 spectrum. Time-resolved spectra and time-resolved images were obtained and analysed. All the observed spectral features, including the substantial lack of a «blue» component, the amount of red shift and bandwidth, are consistent with the Karttunen theory of half-integer harmonics generated in plasmas. This theory takes into account the propagation of ω/2 plasmons produced by «two plasmon decay» and their coupling with laser light.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02457172

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XUV generation from plasma produced by a XeCl excimer laser on a Cu target (1993)

Palladino, L. ; Reale, A. ; Taglieri, G. ; [et al.]

Springer

Il nuovo cimento della Società Italiana di Fisica 15 (1993), S. 1133-1146

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ISSN: 0392-6737

Keywords: Plasma production and heating by laser beams ; X-ray and ψ-ray measurements

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Summary We present a detailed study of XUV and soft X-ray emission from Cu plasma produced by an excimer laser at intensitiesI L≦8·1011 W/cm2. The XeCl excimer laser (ψ≈308 nm) delivers pulses with energyE L≈2.3 J, temporal durationt L≈100 ns and brightnessB≧1014 W/cm2 sr. We recorded a spectral conversion efficiency η=0.5% eV−1 forI L=4·1011W/cm2 in the aluminium window at 73eV with a harder X-ray tail around ≈400eV. We also measured the dependence of X-ray signal on laser intensity and viewing angle. Experimental results have been compared with some analytical laser-plasma interaction models.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02451883

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The use of high energy laser-plasma sources in soft X-ray contact microscopy of living biological samples (2002)

Batani, D. ; Botto, C. ; Moret, M. ; [et al.]

Springer

The European physical journal 21 (2002), S. 167-179

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ISSN: 1434-6079

Keywords: PACS. 07.85.-m X- and gamma-ray instruments – 52.50.Jm Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.) – 78.70.En X-ray emission spectra and fluorescence

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: In this paper the results of an experiment on soft X-ray contact microscopy using a laser-plasma source are presented. A resolution of 50 nm has been achieved imaging pig sperm cells, while other specimens, such as algae and yeast cells, showed internal details, proving the technique to be a powerful tool for biological investigations. Original biological information has been obtained and the conditions for optimal image formation have been studied.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1140/epjd/e2002-00194-y

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