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Electro-optic technique with improved time resolution for real-time, nondestructive, single-shot measurements of femtosecond electron bunch profiles

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  • G. Berden
  • S.P. Jamison
  • A.M. MacLeod
  • W.A. Gillespie
  • B. Redlich
  • A.F.G. Van der Meer
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Article number114802
<mark>Journal publication date</mark>9/09/2004
<mark>Journal</mark>Physical review letters
Issue number11
Volume93
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Electro-optic detection of the Coulomb field of a relativistic electron bunch combined with single-shot cross correlation of optical pulses is used to enable single-shot measurements of the shape and length of femtosecond electron bunches. This method overcomes a fundamental time-resolution limit of previous single-shot electro-optic measurements, which arises from the inseparability of time and frequency properties of the probing optical pulse. Using this new technique we have made real-time measurements of a 50 MeV electron bunch, observing the profile of 650 fs FWHM (

275


f
s
rms) long bunches.