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Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses.
Albert, F; Lemos, N; Shaw, J L; Pollock, B B; Goyon, C; Schumaker, W; Saunders, A M; Marsh, K A; Pak, A; Ralph, J E; Martins, J L; Amorim, L D; Falcone, R W; Glenzer, S H; Moody, J D; Joshi, C.
Afiliación
  • Albert F; Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA.
  • Lemos N; Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA.
  • Shaw JL; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Pollock BB; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Goyon C; Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA.
  • Schumaker W; Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA.
  • Saunders AM; SLAC National Accelerator Laboratory, Stanford, California 94309, USA.
  • Marsh KA; Lawrence Berkeley National Laboratory and University of California Berkeley, Berkeley, California 94720, USA.
  • Pak A; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Ralph JE; Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA.
  • Martins JL; Lawrence Livermore National Laboratory, NIF and Photon Sciences, 7000 East Avenue, Livermore, California 94550, USA.
  • Amorim LD; GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal.
  • Falcone RW; Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
  • Glenzer SH; GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal.
  • Moody JD; Lawrence Berkeley National Laboratory and University of California Berkeley, Berkeley, California 94720, USA.
  • Joshi C; SLAC National Accelerator Laboratory, Stanford, California 94309, USA.
Phys Rev Lett ; 118(13): 134801, 2017 Mar 31.
Article en En | MEDLINE | ID: mdl-28409970
ABSTRACT
We investigate a new regime for betatron x-ray emission that utilizes kilojoule-class picosecond lasers to drive wakes in plasmas. When such laser pulses with intensities of ∼5×10^{18} W/cm^{2} are focused into plasmas with electron densities of ∼1×10^{19} cm^{-3}, they undergo self-modulation and channeling, which accelerates electrons up to 200 MeV energies and causes those electrons to emit x rays. The measured x-ray spectra are fit with a synchrotron spectrum with a critical energy of 10-20 keV, and 2D particle-in-cell simulations were used to model the acceleration and radiation of the electrons in our experimental conditions.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2017 Tipo del documento: Article
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2017 Tipo del documento: Article