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

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

Abstract

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J. van Tilborg^1,*, C. B. Schroeder¹, C. V. Filip², Cs. Tóth¹, C. G. R. Geddes¹, G. Fubiani^1,†, R. Huber¹, R. A. Kaindl¹, E. Esarey^1,2, and W. P. Leemans^1,2
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.

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

^*Also at Eindhoven University of Technology, the Netherlands.

^†Also at University of Paris XI, Orsay, France.

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

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