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| Hauptseite > Publikationsdatenbank > Laser absorption in microdroplet plasmas |
| Hauptseite > Publikationsdatenbank > Laser absorption in microdroplet plasmas |
| Journal Article | PreJuSER-60178 |
; ;
2007
EDP Sciences
Les Ulis
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Please use a persistent id in citations: doi:10.1209/0295-5075/80/25002
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. Copyright (C) EPLA, 2007.
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