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Probing ultrafast dynamics of solid-density plasma generated by high-contrast intense laser pulses

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Author(s)

  • Kamalesh Jana
  • David R. Blackman
  • Moniruzzaman Shaikh
  • Amit D. Lad
  • Deep Sarkar
  • Indranuj Dey
  • Alex P.L. Robinson
  • John Pasley
  • G. Ravindra Kumar

Department/unit(s)

Publication details

JournalPhysics of Plasmas
DateAccepted/In press - 13 Dec 2017
DateE-pub ahead of print - 29 Dec 2017
DatePublished (current) - 1 Jan 2018
Issue number1
Volume25
Number of pages5
Early online date29/12/17
Original languageEnglish

Abstract

We present ultrafast dynamics of solid-density plasma created by high-contrast (picosecond contrast ∼10-9), high-intensity (∼4 × 1018 W/cm2) laser pulses using time-resolved pump-probe Doppler spectrometry. Experiments show a rapid rise in blue-shift at early time delay (2-4.3 ps) followed by a rapid fall (4.3-8.3 ps) and then a slow rise in blue-shift at later time delays (>8.3 ps). Simulations show that the early-time observations, specifically the absence of any red-shifting of the reflected probe, can only be reproduced if the front surface is unperturbed by the laser pre-pulse at the moment that the high intensity pulse arrives. A flexible diagnostic which is capable of diagnosing the presence of low-levels of pre-plasma formation would be useful for potential applications in laser-produced proton and ion production, such as cancer therapy and security imaging.

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© 2017 AIP Publishing.This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

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