%0 Journal Article
%A Anand, M.
%A Kahaly, S.
%A Ravindra Kumar, G.
%A Krishnamurthy, M.
%A Sandhu, A. S.
%A Gibbon, P.
%T Enhanced hard x-ray emission from microdroplet preplasma
%J Applied physics letters
%V 88
%@ 0003-6951
%C Melville, NY
%I American Institute of Physics
%M PreJuSER-51647
%P 181111
%D 2006
%Z Record converted from VDB: 12.11.2012
%X We perform a comparative study of hard x-ray emission from femtosecond laser plasmas in 15 mu m methanol microdroplets and Perspex target. The hard x-ray yield from droplet plasmas is similar or equal to 68 times more than that obtained from solid plasmas at 2x10(15) W cm(-2). A 10 ns prepulse at about 5% of the main pulse appears to be essential for hard x-ray generation from droplets. Hot electron temperature of 36 keV is measured from the droplets at 8x10(14) W cm(-2), whereas a three times higher intensity is needed to obtain similar hot electron temperatures from Perspex plasmas. Particle-in-cell simulations with very long scale-length density profiles support experimental observations. (c) 2006 American Institute of Physics.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000237321600011
%R 10.1063/1.2200761
%U https://juser.fz-juelich.de/record/51647