Femtosecond laser-induced damage threshold in snow micro-structured targets

O. Shavit*, Y. Ferber, J. Papeer, E. Schleifer, M. Botton, A. Zigler, Z. Henis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Enhanced acceleration of protons to high energy by relatively modest high power ultra-short laser pulses, interacting with snow micro-structured targets was recently proposed. A notably increased proton energy was attributed to a combination of several mechanisms such as localized enhancement of the laser field intensity near the tip of 1 µm size whisker and increase in the hot electron concentration near the tip. Moreover, the use of mass-limited target prevents undesirable spread of absorbed laser energy out of the interaction zone. With increasing laser intensity a Coulomb explosion of the positively charged whisker will occur. All these mechanisms are functions of the local density profile and strongly depend on the laser pre-pulse structure. To clarify the effect of the pre-pulse on the state of the snow micro-structured target at the time of interaction with the main pulse, we measured the optical damage threshold (ODT) of the snow targets. ODT of 0.4 J/cm2 was measured by irradiating snow micro-structured targets with 50 fs duration pulses of Ti:Sapphire laser.

Original languageAmerican English
Article numbere7
JournalHigh Power Laser Science and Engineering
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© The Author(s) 2018.


  • High intensity laser
  • Ion acceleration
  • Optical damage threshold


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