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Sökning: WFRF:(FALK S) > Konferensbidrag

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  • Spesyvtsev, R., et al. (författare)
  • Generation of electron high energy beams with a ring-like structure by a dual stage laser wakefield accelerator
  • 2019
  • Ingår i: Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III. - : SPIE. - 9781510627383 ; 11036
  • Konferensbidrag (refereegranskat)abstract
    • The laser wake-field accelerator (LWFA) traditionally produces high brightness, quasi-monoenergetic electron beams with Gaussian-like spatial and angular distributions. In the present work we investigate the generation of ultra-relativistic beams with ring-like structures in the blowout regime of the LWFA using a dual stage accelerator. A density down-ramp triggers injection after the first stage and is used to produce ring-like electron spectra in the 300 - 600 MeV energy range. These well defined, annular beams are observed simultaneously with the on-axis, high energy electron beams, with a divergence of a few milliradians. The rings have quasi-monoenergetic energy spectra with an RMS spread estimated to be less than 5%. Particle-in-cell simulations confirm that off-axis injection provides the electrons with the initial transverse momentum necessary to undertake distinct betatron oscillations within the plasma bubble during their acceleration process.
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  • Falk, H., et al. (författare)
  • TACLeBench : A benchmark collection to support worst-case execution time research
  • 2016
  • Ingår i: OpenAccess Series in Informatics. - 9783959770255 ; , s. 2.1-2.10
  • Konferensbidrag (refereegranskat)abstract
    • Engineering related research, such as research on worst-case execution time, uses experimentation to evaluate ideas. For these experiments we need example programs. Furthermore, to make the research experimentation repeatable those programs shall be made publicly available. We collected open-source programs, adapted them to a common coding style, and provide the collection in open-source. The benchmark collection is called TACLeBench and is available from GitHub in version 1.9 at the publication date of this paper. One of the main features of TACLeBench is that all programs are self-contained without any dependencies on standard libraries or an operating system. 
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  • Resultat 1-10 av 34

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