Title: Laser absorption in microdroplet plasmas
Authors: Anand, M ×
Gibbon, Paul
Krishnamurthy, M #
Issue Date: 2007
Publisher: Editions de Physique
Series Title: Europhysics Letters vol:80 issue:2
Article number: 25002
Abstract: We present experimental measurements of the absorption of ultrashort laser pulses by 15 m diameter methanol microdroplets. The droplet absorbs upto 70% of the incidence laser energy in the presence of a prepulse at intensities of about 1.5 x 10(16) W cm-(-2). In the absence of a prepulse, the absorption is only about 20%. Simultaneous measurements of X-ray yield (12 keV to 350 keV) and the absorption in the droplet plasma, shows that our earlier measurements of e. cient generation (Anand M. et al. Appl. Phys. Lett., 88 (2006) 181111) of hard X-rays from the droplet plasma is due to the increased absorption in the droplets in the presence of optimum prepulse. 1-D PIC simulations, mimicing the mass-limited droplet density pro. le, demonstrate the effectiveness of the large scale-length droplet plasma in providing optimal conditions for resonant laser absorption energy and generation of hot electrons.
ISSN: 0295-5075
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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