Issac, R.C. and Vieux, G. and Ersfeld, B. and Brunetti, E. and Jamison, S.P. and Gallacher, J.G. and Clark, D. and Jaroszynski, D.A. (2004) Ultra hard x rays from krypton clusters heated by intense laser fields. Physics of Plasmas, 11 (7). pp. 3491-3496. ISSN 1070-664XFull text not available in this repository. (Request a copy from the Strathclyde author)
The interaction of ultrashort laser pulses with krypton clusters at intensity up to 1.3×1018 Wcm−2 has been investigated. Intense Kα and Kβ emission from krypton at 12.66 and 14.1 keV, respectively, has been observed using conventional solid state x-ray detectors. The measured x-ray spectra have broad bremsstrahlung continuum reaching to photon energies up to 45 keV, with evidence that approximately 10% of electrons that are heated to very high electron temperatures, which is consistent with a two-temperature electron distribution. This is ascribed to the presence of a hot electron population, similar to that found in laser-solid interactions. The highest laser energy to x-ray conversion efficiency observed is 9.2×10−7, which is equivalent to 45 nJ x-ray pulse energy from the 12.66 keV krypton Kα transition.
|Keywords:||krypton, plasma production by laser, plasma heating by laser, atomic clusters, plasma diagnostics, bremsstrahlung, X-ray emission spectra, plasma temperature, Physics, Condensed Matter Physics|
|Subjects:||Science > Physics|
|Department:||Faculty of Science > Physics|
|Depositing user:||Strathprints Administrator|
|Date Deposited:||26 Apr 2010 13:00|
|Last modified:||20 May 2016 02:51|