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APS » Journals » Phys. Rev. E » Volume 80 » Issue 5
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Phys. Rev. E 80, 055402(R) (2009) [4 pages]

Characterization of two distinct, simultaneous hot electron beams in intense laser-solid interactions

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B. I. Cho1, J. Osterholz1,2, A. C. Bernstein1, G. M. Dyer1, A. Karmakar3, A. Pukhov3, and T. Ditmire1
1Texas Center for High Intensity Laser Science, Department of Physics, University of Texas, Austin, Texas 78712-0263, USA
2Institute for Laser and Plasmaphysics, Heinrich-Heine-University, Geb. 25.33, Universitätsstr. 1, 40225 Düsseldorf, Germany
3Institut für Theoretische Physik I, Heinrich-Heine-Universität, Universitätsstr. 1, 40225 Düsseldorf, Germany

Received 13 May 2008; revised 27 August 2009; published 11 November 2009

The transport of energetic electron beams generated from aluminum foils irradiated by ultraintense laser pulses has been studied by imaging coherent transition radiation from the rear side of the target. Two distinct beams of MeV electrons are emitted from the target rear side at the same time. This measurement indicates that two different mechanisms, namely resonance absorption and j×B heating, accelerate the electrons at the targets front side and drive them to different directions, with different temperatures. This interpretation is consistent with 3D-particle-in-cell simulations.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.80.055402
DOI:
10.1103/PhysRevE.80.055402
PACS:
52.38.−r, 52.50.Jm
 
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