Title: Enhanced hard x-ray emission from microdroplet preplasma
Authors: Anand, M ×
Kahaly, S
Kumar, GR
Krishnamurthy, M
Sandhu, AS
Gibbon, Paul #
Issue Date: 2006
Publisher: American Institute of Physics
Series Title: Applied Physics Letters vol:88 issue:18 pages:181111-181111
Abstract: 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.
ISSN: 0003-6951
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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