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Phys. Rev. Lett. 96, 014801 (2006) [4 pages]

Temporal Characterization of Femtosecond Laser-Plasma-Accelerated Electron Bunches Using Terahertz Radiation

J. van Tilborg,1 C. B. Schroeder,1 C. V. Filip,2 Cs. Tóth,1 C. G. R. Geddes,1 G. Fubiani,1 R. Huber,1 R. A. Kaindl,1 E. Esarey,1,2 and W. P. Leemans1,2
1Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA
2University of Nevada, Reno, Nevada 89557, USA

Received 1 July 2005; published 4 January 2006

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 ~=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.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.96.014801
DOI: 10.1103/PhysRevLett.96.014801
PACS: 29.25.Bx; 41.60.-m; 52.38.Kd
  • 29.25.Bx
    Electron sources
  • 41.60.-m
    Radiation by moving charges
  • 52.38.Kd
    Laser–plasma acceleration of electrons and ions
  • YEAR: 2006
KEYWORDS: electron accelerators, plasma accelerators, particle beam diagnostics, submillimetre waves

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