TY  - JOUR
AU  - Anand, M.
AU  - Kahaly, S.
AU  - Ravindra Kumar, G.
AU  - Krishnamurthy, M.
AU  - Sandhu, A. S.
AU  - Gibbon, P.
TI  - Enhanced hard x-ray emission from microdroplet preplasma
JO  - Applied physics letters
VL  - 88
SN  - 0003-6951
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-51647
SP  - 181111
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000237321600011
DO  - DOI:10.1063/1.2200761
UR  - https://juser.fz-juelich.de/record/51647
ER  -