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XX International Linac Conference

MOC05 (Poster)

Presenter: Michael Fitch (FNAL)
Status: Complete
FullText: ps.gz or pdf
Eprint: physics/0008207

Electro-Optic Sampling of Transient Fields From the Passage of High-Charge Electron Bunches

M.J. Fitch, A.C. Melissinos (University of Rochester), P.L. Colestock*, J.-P. Carneiro, H.T. Edwards, W.H. Hartung (Fermi National Accelerator Laboratory)

When a relativistic electron bunch traverses a structure, strong electric fields are induced in its wake. We present measurements of the electric field as a function of time as measured at a fixed location in the beam line. For a 12 nC bunch of duration 4.2 ps FWHM, the peak field is measured >0.5 MV/m. Time resolution of ~5 ps is achieved using electro-optic sampling with a lithium tantalate crystal and a short-pulse infrared laser synchronized to the beam. We present measurements under several different experimental conditions and discuss the influence of mode excitation in the structure.
*Present Address: Los Alamos National Laboratory

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