Observation of the plasma channel dynamics and Coulomb explosion in the interaction of a high-intensity laser pulse with a He gas jet

G. S. Sarkisov, V. Yu Bychenkov, V. T. Tikhonchuk, A. Maksimchuk, S. Y. Chen, R. Wagner, G. Mourou, D. Umstadter

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

We report the first interferometric observations of the dynamics of electron-ion cavitation of relativistically self-focused intense 4 TW, 400 fs laser pulse in a He gas jet. The electron density in a channel 1 mm long and 30 μm in diameter drops by a factor of approximately 10 from the maximum value of ∼8×1019 cm-3. A high radial velocity of the plasma expansion, ∼3.8×108 cm/s, corresponding to an ion energy of about 300 keV, is observed. The total energy of fast ions is estimated to be 6% of the laser pulse energy. The high-velocity radial plasma expulsion is explained by a charge separation due to the strong ponderomotive force. This experiment demonstrates a new possibility for direct transmission of a significant portion of the energy of a laser pulse to ions.

Original languageEnglish (US)
Pages (from-to)828-834
Number of pages7
JournalJETP Letters
Volume66
Issue number12
DOIs
StatePublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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