• Open Access

Measurement of Transverse Wakefields Induced by a Misaligned Positron Bunch in a Hollow Channel Plasma Accelerator

C. A. Lindstrøm, E. Adli, J. M. Allen, W. An, C. Beekman, C. I. Clarke, C. E. Clayton, S. Corde, A. Doche, J. Frederico, S. J. Gessner, S. Z. Green, M. J. Hogan, C. Joshi, M. Litos, W. Lu, K. A. Marsh, W. B. Mori, B. D. O’Shea, N. Vafaei-Najafabadi, and V. Yakimenko
Phys. Rev. Lett. 120, 124802 – Published 23 March 2018

Abstract

Hollow channel plasma wakefield acceleration is a proposed method to provide high acceleration gradients for electrons and positrons alike: a key to future lepton colliders. However, beams which are misaligned from the channel axis induce strong transverse wakefields, deflecting beams and reducing the collider luminosity. This undesirable consequence sets a tight constraint on the alignment accuracy of the beam propagating through the channel. Direct measurements of beam misalignment-induced transverse wakefields are therefore essential for designing mitigation strategies. We present the first quantitative measurements of transverse wakefields in a hollow plasma channel, induced by an off-axis 20 GeV positron bunch, and measured with another 20 GeV lower charge trailing positron probe bunch. The measurements are largely consistent with theory.

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  • Received 7 November 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.124802

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & BeamsPlasma Physics

Authors & Affiliations

C. A. Lindstrøm1,*, E. Adli1, J. M. Allen2, W. An3, C. Beekman4, C. I. Clarke2, C. E. Clayton3, S. Corde4, A. Doche4, J. Frederico2, S. J. Gessner2,†, S. Z. Green2, M. J. Hogan2, C. Joshi3, M. Litos5, W. Lu6, K. A. Marsh3, W. B. Mori7, B. D. O’Shea2, N. Vafaei-Najafabadi3,‡, and V. Yakimenko2

  • 1Department of Physics, University of Oslo, 0316 Oslo, Norway
  • 2SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 3Department of Electrical Engineering, University of California-Los Angeles, Los Angeles, California 90095, USA
  • 4LOA, ENSTA ParisTech, CNRS, Ecole Polytechnique, Université Paris-Saclay, 91762 Palaiseau, France
  • 5Department of Physics, University of Colorado Boulder, Boulder, Colorado 80309, USA
  • 6IFSA Collaborative Innovation Center, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • 7Department of Physics and Astronomy, University of California-Los Angeles, Los Angeles, California 90095, USA

  • *c.a.lindstrom@fys.uio.no
  • Present address: CERN, Geneva, Switzerland.
  • Present address: Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA.

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Issue

Vol. 120, Iss. 12 — 23 March 2018

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