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Proceedings Article

Investigating the effects of laser intensity and pulse duration on 6.7-nm BEUV emission from Gadolinium plasma

[+] Author Affiliations
Thomas Cummins, Bowen Li, Colm O'Gorman, Padraig Dunne, Emma Sokell, Gerry O'Sullivan

Univ. College Dublin (Ireland)

Takamitsu Otsuka, Noboru Yugami, Takeshi Higashiguchi

Utsunomiya Univ. (Japan)

Weihua Jiang

Nagaoka Univ. of Technology (Japan)

Akira Endo

Institute of Physics of the ASCR, v.v.i. (Czech Republic)

Proc. SPIE 8678, Short-Wavelength Imaging and Spectroscopy Sources, 86780C (December 11, 2012); doi:10.1117/12.2015164
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From Conference Volume 8678

  • Short-Wavelength Imaging and Spectroscopy Sources
  • Davide Bleiner
  • Bern, Switzerland | September 10, 2012

abstract

In this work we present results on the influence of laser pulse duration and irradiating power density on the conversion efficiency (CE) and the ion energy of gadolinium (Gd) laser produced plasmas. Three lasers were used with 10 ns, 150 ps and 140 fs pulse durations. By varying the lasers output energies, experiments could be carried out for a power density range of 1011 - 1015 W/cm2. A maximum CE of 0.4% was achieved within a 0.6% bandwidth in 2π steradians using the picosecond laser. A faraday cup was used to calculate ion yield and time of flight measurements of each laser. The picosecond laser also showed a reduction in the ion time of flight measurements compared with the nanosecond pulse. © (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Thomas Cummins ; Takamitsu Otsuka ; Noboru Yugami ; Weihua Jiang ; Akira Endo, et al.
" Investigating the effects of laser intensity and pulse duration on 6.7-nm BEUV emission from Gadolinium plasma ", Proc. SPIE 8678, Short-Wavelength Imaging and Spectroscopy Sources, 86780C (December 11, 2012); doi:10.1117/12.2015164; http://dx.doi.org/10.1117/12.2015164


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