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Phys. Rev. Lett. 87, 034801 (2001) [4 pages]

Electro-optic Measurement of the Wake Fields of a Relativistic Electron Beam

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M. J. Fitch* and A. C. Melissinos
Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627

P. L. Colestock†, J.-P. Carneiro‡, H. T. Edwards, and W. H. Hartung§
Fermi National Accelerator Laboratory, Batavia, Illinois 60510

Received 2 March 2001; published 26 June 2001

When a relativistic electron bunch traverses a structure, strong electromagnetic fields are induced in its wake. For a 12 nC bunch of duration 4.2 ps FWHM, the peak field is measured >0.5MV/m. Time resolution of ∼5ps is achieved using electro-optic sampling with a lithium tantalate (LiTaO3) crystal and a short-pulse infrared laser synchronized to the beam. We present measurements for both the longitudinal and radial components of the field and relate them to the wall impedance.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.034801
DOI:
10.1103/PhysRevLett.87.034801
PACS:
29.27.Bd, 29.25.Bx, 41.75.Ht, 52.59.-f

*Present address: Institute of Optics, University of Rochester, Rochester, NY 14627.

†Present address: Los Alamos National Laboratory, Los Alamos, NM 87545.

‡Present address: Université Paris Sud F-91405 Orsay, France.

§Present address: NSCL/Cyclotron Lab Michigan State University, East Lansing, Michigan 48824.

 
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