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Controlling the spectrum of x-rays generated in a laser-plasma accelerator by tailoring the laser wavefront

Appl. Phys. Lett. 95, 181106 (2009); doi:10.1063/1.3258022

Published 4 November 2009

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S. P. D. Mangles,1 G. Genoud,2 S. Kneip,1 M. Burza,2 K. Cassou,3 B. Cros,3 N. P. Dover,1 C. Kamperidis,2 Z. Najmudin,1 A. Persson,2 J. Schreiber,1 F. Wojda,3 and C.-G. Wahlström2
1Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom
2Department of Physics, Lund University, P.O. Box 118, S-22100 Lund, Sweden
3Laboratoire de Physique des Gaz et des Plasmas, Centre National de la Recherche Scientifique, Université Paris XI, 91405 Orsay, France
By tailoring the wavefront of the laser pulse used in a laser-wakefield accelerator, we show that the properties of the x-rays produced due to the electron beam's betatron oscillations in the plasma can be controlled. By creating a wavefront with coma, we find that the critical energy of the synchrotronlike x-ray spectrum can be significantly increased. The coma does not substantially change the energy of the electron beam, but does increase its divergence and produces an energy-dependent exit angle, indicating that changes in the x-ray spectrum are due to an increase in the electron beam's oscillation amplitude within the wakefield. ©2009 American Institute of Physics
History: Received 1 September 2009; accepted 13 October 2009; published 4 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/181106/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.25.Os
    Emission, absorption, and scattering of electromagnetic radiation from plasmas
  • 52.59.Px
    Plasma hard X-ray sources
  • 52.38.Kd
    Laser-plasma acceleration of electrons and ions
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (12)
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