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Phys. Rev. Lett. 100, 214801 (2008) [4 pages]

Breakdown Limits on Gigavolt-per-Meter Electron-Beam-Driven Wakefields in Dielectric Structures

M. C. Thompson,1,2 H. Badakov,1 A. M. Cook,1 J. B. Rosenzweig,1 R. Tikhoplav,1 G. Travish,1 I. Blumenfeld,3 M. J. Hogan,3 R. Ischebeck,3 N. Kirby,3 R. Siemann,3 D. Walz,3 P. Muggli,4 A. Scott,5 and R. B. Yoder6
1Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
2Lawrence Livermore National Laboratory, Livermore, California 94551, USA
3Stanford Linear Accelerator Center, Menlo Park, California 94025, USA
4University of Southern California, Los Angeles, California 90089, USA
5University of California, Santa Barbara, California 93106, USA
6Manhattan College, Riverdale, New York 10471, USA
Received 20 January 2008; published 27 May 2008

First measurements of the breakdown threshold in a dielectric subjected to GV/m wakefields produced by short (30–330 fs), 28.5 GeV electron bunches have been made. Fused silica tubes of 100 µm inner diameter were exposed to a range of bunch lengths, allowing surface dielectric fields up to 27 GV/m to be generated. The onset of breakdown, detected through light emission from the tube ends, is observed to occur when the peak electric field at the dielectric surface reaches 13.8±0.7 GV/m. The correlation of structure damage to beam-induced breakdown is established using an array of postexposure inspection techniques.

©2008 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.100.214801
DOI: 10.1103/PhysRevLett.100.214801
PACS: 41.75.Lx; 41.75.Ht; 52.25.Mq; 77.22.Jp
  • 41.75.Lx
    Other advanced accelerator concepts (charged-particle beams)
  • 41.75.Ht
    Relativistic electron and positron beams
  • 52.25.Mq
    Plasma dielectric properties
  • 77.22.Jp
    Dielectric breakdown and space-charge effects
  • YEAR: 2008

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