Self-focusing, channel formation, and high-energy ion generation in interaction of an intense short laser pulse with a he jet

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

Research output: Contribution to journalArticle

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Abstract

Using interferometry, we investigate the dynamics of interaction of a relativistically intense 4-TW, 400-fs laser pulse with a He gas jet. We observe a stable plasma channel 1 mm long and less than 30 [Formula Presented]m in diameter, with a radial gradient of electron density [Formula Presented] [Formula Presented] and with an on-axis electron density approximately ten times less than its maximum value of [Formula Presented] [Formula Presented] A high radial velocity of the surrounding gas ionization of [Formula Presented] cm/s has been observed after the channel formation, and it is attributed to the fast ions expelled from the laser channel and propagating radially outward. We developed a kinetic model which describes the plasma channel formation and the subsequent ambient gas excitation and ionization. Comparing the model predictions with the interferometric data, we reconstructed the axial profile of laser channel and on-axis laser intensity. The estimated maximum energy of accelerated ions is about 500 keV, and the total energy of the fast ions is 5% of the laser pulse energy.

Original languageEnglish (US)
Pages (from-to)7042-7054
Number of pages13
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume59
Issue number6
DOIs
StatePublished - Jan 1 1999

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Self-focusing
self focusing
High Energy
Laser
pulses
Interaction
lasers
ions
interactions
energy
Ionization
Plasma
Energy
Electron
gas ionization
Radial velocity
gas jets
Interferometry
Kinetic Model
radial velocity

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)

Cite this

Self-focusing, channel formation, and high-energy ion generation in interaction of an intense short laser pulse with a he jet. / Sarkisov, G. S.; Bychenkov, V. Yu; Novikov, V. N.; Tikhonchuk, V. T.; Maksimchuk, A.; Chen, S. Y.; Wagner, R.; Mourou, G.; Umstadter, D.

In: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 59, No. 6, 01.01.1999, p. 7042-7054.

Research output: Contribution to journalArticle

Sarkisov, G. S. ; Bychenkov, V. Yu ; Novikov, V. N. ; Tikhonchuk, V. T. ; Maksimchuk, A. ; Chen, S. Y. ; Wagner, R. ; Mourou, G. ; Umstadter, D. / Self-focusing, channel formation, and high-energy ion generation in interaction of an intense short laser pulse with a he jet. In: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics. 1999 ; Vol. 59, No. 6. pp. 7042-7054.
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AU - Tikhonchuk, V. T.

AU - Maksimchuk, A.

AU - Chen, S. Y.

AU - Wagner, R.

AU - Mourou, G.

AU - Umstadter, D.

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N2 - Using interferometry, we investigate the dynamics of interaction of a relativistically intense 4-TW, 400-fs laser pulse with a He gas jet. We observe a stable plasma channel 1 mm long and less than 30 [Formula Presented]m in diameter, with a radial gradient of electron density [Formula Presented] [Formula Presented] and with an on-axis electron density approximately ten times less than its maximum value of [Formula Presented] [Formula Presented] A high radial velocity of the surrounding gas ionization of [Formula Presented] cm/s has been observed after the channel formation, and it is attributed to the fast ions expelled from the laser channel and propagating radially outward. We developed a kinetic model which describes the plasma channel formation and the subsequent ambient gas excitation and ionization. Comparing the model predictions with the interferometric data, we reconstructed the axial profile of laser channel and on-axis laser intensity. The estimated maximum energy of accelerated ions is about 500 keV, and the total energy of the fast ions is 5% of the laser pulse energy.

AB - Using interferometry, we investigate the dynamics of interaction of a relativistically intense 4-TW, 400-fs laser pulse with a He gas jet. We observe a stable plasma channel 1 mm long and less than 30 [Formula Presented]m in diameter, with a radial gradient of electron density [Formula Presented] [Formula Presented] and with an on-axis electron density approximately ten times less than its maximum value of [Formula Presented] [Formula Presented] A high radial velocity of the surrounding gas ionization of [Formula Presented] cm/s has been observed after the channel formation, and it is attributed to the fast ions expelled from the laser channel and propagating radially outward. We developed a kinetic model which describes the plasma channel formation and the subsequent ambient gas excitation and ionization. Comparing the model predictions with the interferometric data, we reconstructed the axial profile of laser channel and on-axis laser intensity. The estimated maximum energy of accelerated ions is about 500 keV, and the total energy of the fast ions is 5% of the laser pulse energy.

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