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Träfflista för sökning "WFRF:(Ter Avetisyan S.) srt2:(2001)"

Search: WFRF:(Ter Avetisyan S.) > (2001)

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1.
  • Schnurer, M., et al. (author)
  • Influence of laser pulse width on absolute EUV-yield from Xe-clusters
  • 2001
  • In: European Physical Journal D. - : Springer Science and Business Media LLC. - 1434-6060 .- 1434-6079. ; 14:3, s. 331-335
  • Journal article (peer-reviewed)abstract
    • Using 50 fs (similar to 2 x 10(18) W/cm(2)) and 2 ps (similar to 5 x 10(16) W/cm(2)) pulses from a Ti:Sa multi-TW laser at 800 nm wavelength large Xe-clusters (10(5)...10(6) atoms per cluster) have been excited. Absolute yield measurements of EUV-emission in a wavelength range between 10 nm and 15 nm in combination with cluster target variation were carried out. The ps-laser pulse has resulted in about 30% enhanced and spatially more uniform EUV-emission compared to fs-laser excitation. Circularly polarized laser light instead of linear polarization results in enhanced emission which is probably caused by electrons gaining higher energies by the polarization dependent optical field ionization process. An absolute emission efficiency at 13.4 nm of up to 0.8% in 2 pi sr and 2.2% bandwidth has been obtained.
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2.
  • Ter-Avetisyan, S., et al. (author)
  • Absolute extreme ultraviolet yield from femtosecond-laser-excited Xe clusters
  • 2001
  • In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics. - 1063-651X .- 1095-3787. ; 6403:3
  • Journal article (peer-reviewed)abstract
    • Large Xe clusters (10(5)-10(6) atoms per cluster) have been irradiated with ultrashort (50 fs) and high-intensity (similar to2 x 10(18) W/cm(2)) pulses from a Ti:sapphire multi-TW laser at 800 nm wavelength. Scaling and absolute yield measurements of extreme ultraviolet (EUV) emission in a wavelength range between 7 and 15 nm in combination with cluster target characterization have been used for yield optimization. Maximum emission as a function of the backing pressure and a spatial emission anisotropy covering a factor of two at optimized yields is discussed with a simple model of the source geometry and EUV-radiation absorption. Circularly polarized laser light instead of linear polarization results in a factor of 2.5 higher emission in the 11 to 15 nm wavelength range. This indicates the initial influence of optical-field ionization for the interaction parameter range used and contrasts to collisional heating that seems to influence preferentially higher ionization. Absolute emission efficiency at 13.4 nm of up to 0.5% in 2 pi sr and 2.2% bandwidth has been obtained.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Vogt, Ulrich (2)
Sandner, W (2)
Stiel, H. (2)
Schnurer, M. (2)
Nickles, P. V. (2)
Ter-Avetisyan, S. (2)
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Radloff, W. (2)
Kalashnikov, M. (1)
Karpov, W. (1)
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University
Royal Institute of Technology (2)
Language
English (2)
Year
2001 (2)Undo refine

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