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Optimizing electron-positron pair production on kilojoule-class high-intensity lasers for the purpose of pair-plasma creation.

Authors
  • Myatt, J
  • Delettrez, J A
  • Maximov, A V
  • Meyerhofer, D D
  • Short, R W
  • Stoeckl, C
  • Storm, M
Type
Published Article
Journal
Physical Review E
Publisher
American Physical Society (APS)
Publication Date
Jun 01, 2009
Volume
79
Issue
6 Pt 2
Pages
66409–66409
Identifiers
PMID: 19658614
Source
Medline
License
Unknown

Abstract

Expressions for the yield of electron-positron pairs, their energy spectra, and production rates have been obtained in the interaction of multi-kJ pulses of high-intensity laser light interacting with solid targets. The Bethe-Heitler conversion of hard x-ray bremsstrahlung [D. A. Gryaznykh, Y. Z. Kandiev, and V. A. Lykov, JETP Lett. 67, 257 (1998); K. Nakashima and H. Takabe, Phys. Plasmas 9, 1505 (2002)] is shown to dominate over direct production (trident process) [E. P. Liang, S. C. Wilks, and M. Tabak, Phys. Rev. Lett. 81, 4887 (1998)]. The yields and production rates have been optimized as a function of incident laser intensity by the choice of target material and dimensions, indicating that up to 5 x 10 (11) pairs can be produced on the OMEGA EP laser system [L. J. Waxer, Opt. Photonics News 16, 30 (2005)]. The corresponding production rates are high enough to make possible the creation of a pair plasma.

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