Demonstration of a positron beam-driven hollow channel plasma wakefield accelerator
| Autor: | Mark Hogan, Wei Lu, Michael Litos, Dieter Walz, Vitaly Yakimenko, N. Lipkowitz, K. A. Marsh, Warren Mori, Christine Clarke, J. Frederico, Jean-Pierre Delahaye, C. E. Clayton, Brendan O'Shea, Erik Adli, James Allen, Gerald Yocky, S. Z. Green, C. Hast, Sebastien Corde, Chan Joshi, Navid Vafaei-Najafabadi, C. A. Lindstrøm, Weiming An, Spencer Gessner |
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| Přispěvatelé: | SLAC National Accelerator Laboratory (SLAC), Stanford University, Department of Physics [Oslo], Faculty of Mathematics and Natural Sciences [Oslo], University of Oslo (UiO)-University of Oslo (UiO), University of California [Los Angeles] (UCLA), University of California, Department of Physics and Astronomy [UCLA, Los Angeles], University of California-University of California, Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Tsinghua University [Beijing] (THU) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Orders of magnitude (temperature)
Science General Physics and Astronomy 01 natural sciences General Biochemistry Genetics and Molecular Biology Article 010305 fluids & plasmas law.invention Positron Optics law Physics::Plasma Physics [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] 0103 physical sciences 010306 general physics Physics [PHYS]Physics [physics] Multidisciplinary business.industry Particle accelerator General Chemistry Plasma Plasma acceleration Transverse plane Physics::Accelerator Physics Plasma channel Atomic physics business Communication channel |
| Zdroj: | Nature Communications Nature Communications, Nature Publishing Group, 2016, 7, pp.11785. ⟨10.1038/ncomms11785⟩ Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016) |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/ncomms11785⟩ |
| Popis: | Plasma wakefield accelerators have been used to accelerate electron and positron particle beams with gradients that are orders of magnitude larger than those achieved in conventional accelerators. In addition to being accelerated by the plasma wakefield, the beam particles also experience strong transverse forces that may disrupt the beam quality. Hollow plasma channels have been proposed as a technique for generating accelerating fields without transverse forces. Here we demonstrate a method for creating an extended hollow plasma channel and measure the wakefields created by an ultrarelativistic positron beam as it propagates through the channel. The plasma channel is created by directing a high-intensity laser pulse with a spatially modulated profile into lithium vapour, which results in an annular region of ionization. A peak decelerating field of 230 MeV m−1 is inferred from changes in the beam energy spectrum, in good agreement with theory and particle-in-cell simulations. Plasma wakefield accelerators produce gradients that are orders of magnitude larger than in conventional particle accelerator, but beams tend to be disrupted by transverse forces. Here the authors create an extended hollow plasma channel, which accelerates positrons without generating transverse forces. |
| Databáze: | OpenAIRE |
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