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Laser-plasma electron acceleration in dielectric capillary tubes

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  • معلومة اضافية
    • Contributors:
      Laboratoire de l'Accélérateur Linéaire (LAL); Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11); Laboratoire de physique des gaz et des plasmas (LPGP); Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS); Centro Atómico Bariloche [Argentine]; Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Comisión Nacional de Energía Atómica [ARGENTINA] (CNEA); Blackett Laboratory; Imperial College London; Laboratoire d'optique appliquée (LOA); École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS); Laboratoire d'aérologie (LAERO); Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP); Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3); Université Fédérale Toulouse Midi-Pyrénées; Department of Physics; Lund University [Lund]
    • بيانات النشر:
      Springer Nature
    • نبذة مختصرة :
      International audience; Electron beams and betatron X-ray radiation generated by laser wakefield acceleration in long plasma targets are studied. The targets consist of hydrogen filled dielectric capillary tubes of diameter 150 to 200 microns and length 6 to 20 mm. Electron beams are observed for peak laser intensities as low as 5×1017 W/cm2. It is found that the capillary collects energy outside the main peak of the focal spot and contributes to keep the beam self-focused over a distance longer than in a gas jet of similar density. This enables the pulse to evolve enough to reach the threshold for wavebreaking, and thus trap and accelerate electrons. No electrons were observed for capillaries of large diameter (250 μm), confirming that the capillary influences the interaction and does not have the same behaviour as a gas cell. Finally, X-rays are used as a diagnostic of the interaction and, in particular, to estimate the position of the electrons trapping point inside the capillary.
    • ISSN:
      0946-2171
    • الرقم المعرف:
      10.1007/s00340-011-4639-4
    • Rights:
      OPEN
    • الرقم المعرف:
      edsair.doi.dedup.....bad899ddf68c9f2981b3a348ef7406c1