Observation of Multi-GeV Breakdown Thresholds in Dielectric Wakefield Structures

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An experiment designed to test the breakdown threshold of a dielectric subjected to the GV/m-scale electric-fields of an intense electron-beam has been completed. In this experiment at the Final Focus Test Beam (FFTB) facility, the 28.5 GeV SLAC electron beam was focused down and propagated through short fused-silica capillary-tubes with internal diameters of as little as 100 {micro}m. The electric field at the inner surface of the tubes was varied from about 1 GV/m to 22 GV/m by adjusting the longitudinal compression of the electron bunch. We observed a sharp increase in optical emissions from the capillaries in the middle ... continued below

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Thompson, M.C.; Thompson, M.C.; /LLNL, Livermore; Yoder, R.B.; /Manhattan Coll., Riverdale; Hogan, M.J. et al. January 30, 2008.

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An experiment designed to test the breakdown threshold of a dielectric subjected to the GV/m-scale electric-fields of an intense electron-beam has been completed. In this experiment at the Final Focus Test Beam (FFTB) facility, the 28.5 GeV SLAC electron beam was focused down and propagated through short fused-silica capillary-tubes with internal diameters of as little as 100 {micro}m. The electric field at the inner surface of the tubes was varied from about 1 GV/m to 22 GV/m by adjusting the longitudinal compression of the electron bunch. We observed a sharp increase in optical emissions from the capillaries in the middle part of this surface field range which we believe indicates the transition between sustainable field levels and breakdown. If this initial interpretation is correct, the multi-GV/m surfaced fields that were sustained equate to on axis accelerating field of several GV/m.

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  • Journal Name: Conf.Proc.C070625:3026,2007; Conference: Particle Accelerator Conference PAC07 25-29 Jun 2007, Albuquerque, New Mexico

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  • Report No.: SLAC-PUB-13106
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 922959
  • Archival Resource Key: ark:/67531/metadc896882

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  • January 30, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 30, 2016, 2:05 p.m.

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Thompson, M.C.; Thompson, M.C.; /LLNL, Livermore; Yoder, R.B.; /Manhattan Coll., Riverdale; Hogan, M.J. et al. Observation of Multi-GeV Breakdown Thresholds in Dielectric Wakefield Structures, article, January 30, 2008; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc896882/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.