Temporal characterization of femtosecond laser-plasma-accelerated electron bunches using terahertz radiation

The temporal profile of relativistic laser-plasma-accelerated electron bunches has been characterized. Coherent transition radiation at THz frequencies, emitted at the plasma-vacuum boundary, was measured through electro-optic sampling. Frequencies up to the crystal detection limit of 4 THz were obs...

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Bibliographic Details
Published in:Physical review letters 2006-01, Vol.96 (1), p.014801-014801, Article 014801
Main Authors: van Tilborg, J, Schroeder, C B, Filip, C V, Tóth, Cs, Geddes, C G R, Fubiani, G, Huber, R, Kaindl, R A, Esarey, E, Leemans, W P
Format: Article
Language:English
Subjects:
ACCELERATORS
BEAM BUNCHING
COMPARATIVE EVALUATIONS
ELECTRO-OPTICAL EFFECTS
ELECTRON BEAMS
LASERS
PARTICLE ACCELERATORS
PLASMA
PLASMA GUNS
PROBES
RELATIVISTIC RANGE
SYNCHRONIZATION
TRANSITION RADIATION
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Summary:The temporal profile of relativistic laser-plasma-accelerated electron bunches has been characterized. Coherent transition radiation at THz frequencies, emitted at the plasma-vacuum boundary, was measured through electro-optic sampling. Frequencies up to the crystal detection limit of 4 THz were observed. Comparison between data and theory indicates that THz radiation from bunches with structure shorter than approximately = 50 fs (root-mean-square) is emitted. The measurement demonstrates both shot-to-shot stability of the laser-plasma accelerator and femtosecond synchronization between bunch and probe beam.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.96.014801