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  • Plasma production and heating by laser beams  (2)
  • PACS. 87.50.-a Effects of radiation and external fields on biomolecules, cells and higher organisms - 42.55.-f Lasers - 52.25.Nr Emission, absorption, and scattering of X and radiation  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Three-half harmonic generation in laser-plasma interaction: Evidence for plasmon propagation (1991)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 845-858 
    Details
    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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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    XUV generation from plasma produced by a XeCl excimer laser on a Cu target (1993)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 15 (1993), S. 1133-1146 
    Details
    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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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Study of a X-ray laser-plasma source for radiobiological experiments: microdosimetry analysis and plasma characterisation (2000)
    Springer
    The European physical journal 11 (2000), S. 309-320 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 87.50.-a Effects of radiation and external fields on biomolecules, cells and higher organisms - 42.55.-f Lasers - 52.25.Nr Emission, absorption, and scattering of X and radiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A soft X-ray laser-plasma source, used in radiobiology experiments with yeast cells, was characterised with flat crystal spectrometers and P-I-N diodes, obtaining an absolute measurement of the emission spectrum. A comparison with the results of simulations performed with the code RATION allowed the characterisation of the emitting plasma. A model for the energy deposition in yeast cells was developed to take into account the different cell structures (wall-membrane complex, cytoplasm and nucleus). Dose calculations performed considering the source emission spectrum were compared with direct measurements of transmission through plastic foils and allowed to verify the hypothesis of preferential dose deposition in the outer cellular regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530070098
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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