Energetic electrons driven in the polarization direction of an intense laser beam incident normal to a solid target

Seely, J. F.; Hudson, L. T.; Pereira, N.; Di Stefano, C. A.; Kuranz, C. C.; Drake, R. P.; Chen, Hui; Williams, G. J.; Park, J.

doi:10.1016/j.hedp.2016.02.003

Title: Energetic electrons driven in the polarization direction of an intense laser beam incident normal to a solid target

Journal Article · Wed Feb 24 00:00:00 EST 2016 · High Energy Density Physics

DOI:https://doi.org/10.1016/j.hedp.2016.02.003· OSTI ID:1253694

Seely, J. F. ^[1]; Hudson, L. T. ^[2]; Pereira, N. ^[3]; Di Stefano, C. A. ^[4]; Kuranz, C. C. ^[4]; Drake, R. P. ^[4]; Chen, Hui ^[5]; Williams, G. J. ^[5]; Park, J. ^[5]

Artep Inc., Ellicott City, MD (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Ecopulse Inc., Springfield, VA (United States)
Univ. of Michigan, Ann Arbor, MI (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Experiments were performed at the LLNL Titan laser to measure the propagation direction of the energetic electrons that were generated during the interaction of the polarized laser beam with solid targets in the case of normal incidence. The energetic electrons propagated through vacuum to spectator metal wires in the polarization direction and in the perpendicular direction, and the K shell spectra from the different wire materials were recorded as functions of the distance from the laser focal spot. It was found that the fluence of the energetic electrons driven into the spectator wires in the polarization direction compared to the perpendicular direction was larger and increased with the distance from the focal spot. Finally, this indicates that energetic electrons are preferentially driven in the direction of the intense oscillating electric field of the incident laser beam in agreement with the multiphoton inverse Bremsstrahlung absorption process.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States); Artep Inc., Ellicott City, MD (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES); Defense Threat Reduction Agency (DTRA) (United States)

Grant/Contract Number:: AC52-07NA27344; NA0001840; DTRA-1-10-0077

OSTI ID:: 1253694

Report Number(s):: LLNL-JRNL-666294

Journal Information:: High Energy Density Physics, Vol. 19; ISSN 1574-1818

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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References (9)

Heating of a Plasma by Multiphoton Inverse Bremsstrahlung Seely, John F.; Harris, Edward G. Physical Review A, Vol. 7, Issue 3 https://doi.org/10.1103/PhysRevA.7.1064	journal	March 1973
Energetic electron propagation in solid targets driven by the intense electric fields of femtosecond laser pulses Seely, J. F.; Szabo, C. I.; Audebert, P. Physics of Plasmas, Vol. 18, Issue 6 https://doi.org/10.1063/1.3596538	journal	June 2011
Measurements of the energy spectrum of electrons emanating from solid materials irradiated by a picosecond laser Di Stefano, C. A.; Kuranz, C. C.; Seely, J. F. Physics of Plasmas, Vol. 22, Issue 4 https://doi.org/10.1063/1.4917325	journal	April 2015
Measurement of high-energy (10–60 keV) x-ray spectral line widths with eV accuracy Seely, J. F.; Glover, J. L.; Hudson, L. T. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4891726	journal	November 2014
Hard x-ray transmission crystal spectrometer at the OMEGA-EP laser facility Seely, J. F.; Szabo, C. I.; Feldman, U. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3464232	journal	October 2010
Enhanced x-ray resolving power achieved behind the focal circles of Cauchois spectrometers Seely, John F.; Hudson, Lawrence T.; Holland, Glenn E. Applied Optics, Vol. 47, Issue 15 https://doi.org/10.1364/AO.47.002767	journal	January 2008
Hard X-ray spectroscopy of inner-shell K transitions generated by MeV electron propagation from intense picosecond laser focal spots Seely, J. F.; Szabo, C. I.; Audebert, P. High Energy Density Physics, Vol. 5, Issue 4 https://doi.org/10.1016/j.hedp.2009.04.012	journal	December 2009
Lateral propagation of MeV electrons generated by femtosecond laser irradiation Seely, J. F.; Szabo, C. I.; Audebert, P. Physics of Plasmas, Vol. 17, Issue 2 https://doi.org/10.1063/1.3298734	journal	February 2010
An empirical expression for K-shell ionization cross section by electron impact Hombourger, C. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 31, Issue 16 https://doi.org/10.1088/0953-4075/31/16/020	journal	August 1998

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