Breakdown limits on Gigavolt-per-meter electron-beam-driven wakefields in dielectric structures.
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 microm 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.
Thompson
M C
MC
Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA. dr.mcthompson@gmail.com
Badakov
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Cook
A M
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Rosenzweig
J B
JB
Tikhoplav
R
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Travish
G
G
Blumenfeld
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Hogan
M J
MJ
Ischebeck
R
R
Kirby
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N
Siemann
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Walz
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D
Muggli
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P
Scott
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A
Yoder
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