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 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.
van Tilborg
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Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.
Schroeder
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Filip
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Tóth
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Geddes
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Fubiani
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Huber
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Kaindl
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Esarey
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Leemans
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