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Hard X-ray generation from microdroplets in intense laser fields

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Abstract

Microdroplets of 15-μm diameter are subjected to ultra-short laser pulses of intensities up to 1015Wcm−2 to produce hot dense plasma. The hot electrons produced in the microdroplet plasma result in efficient generation of hard X-rays in the range 50–150keV at an irradiance as low as 8×1014Wcm−2. The X-ray source efficiency is estimated to be about 2 ×10−7%. A prepulse that is about 11ns ahead of the main pulse strongly influences the droplet plasma and the resulting X-ray emission. For a similar laser prepulse and intensity, no measurable hard X-ray emission is observed when the laser is focused on a solid target of similar composition and this indicates that liquid droplet targets are best suited for hard X-ray generation in laser–plasma interactions.

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Authors and Affiliations

  1. Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai, 400 005, India

    M. Anand & M. Krishnamurthy

  2. Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi, 110067, India

    C. P. Safvan & M. Krishnamurthy

Authors
  1. M. Anand
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  2. C. P. Safvan
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  3. M. Krishnamurthy
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Correspondence to M. Krishnamurthy.

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Anand, M., Safvan, C.P. & Krishnamurthy, M. Hard X-ray generation from microdroplets in intense laser fields. Appl. Phys. B 81, 469–477 (2005). https://doi.org/10.1007/s00340-005-1899-x

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  • DOI: https://doi.org/10.1007/s00340-005-1899-x

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