Prepulse dependence in hard x-ray generation from microdroplets

M. Anand, A. S. Sandhu, S. Kahaly, G. Ravindra Kumar, P. Gibbon, M. Krishnamurthy

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report on experiments which show that liquid microdroplets are very efficient in hard x-ray generation. We make a comparative study of hard x-ray emission from 15 μm methanol microdroplets and a plain slab target of similar atomic composition at similar laser intensities. The hard X-ray yield from droplet plasmas is about 35 times more than that obtained from solid plasmas. A prepulse that is about 10ns and at least 2% in intensity of the main pulse is essential for hard x-ray generation from the droplets at about 10 15 W cm -2. A hot electron temperature of 36 keV is measured from the droplets at 8 × 10 14 W cm -2; three times higher intensity is needed to obtain similar hot electron temperature from solid plasmas that have similar atomic composition. We use 1D-PIC simulation to obtain qualitative correlation to the experimental observations.

Original languageEnglish (US)
Title of host publicationSUPERSTRONG FIELDS IN PLASMAS
Subtitle of host publication3rd International Conference on Superstrong Fields in Plasmas
Number of pages6
StatePublished - Apr 7 2006
Event3rd International Conference on Superstrong Fields in Plasmas - Varenna, Italy
Duration: Sep 19 2005Sep 24 2005

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other3rd International Conference on Superstrong Fields in Plasmas


  • Intense laser
  • Liquid droplets
  • Plasma
  • X-ray generation

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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