Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces

Dromey, B. and Kar, S. and Bellei, C. and Carroll, D.C. and Clarke, R.J. and Green, J.S. and Kneip, S. and Markey, K. and McKenna, P. (2007) Bright multi-keV harmonic generation from relativistically oscillating plasma surfaces. Physical Review Letters, 99 (8). 085001. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.99.085001)

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Abstract

The first evidence of x-ray harmonic radiation extending to 3.3 A, 3.8 keV (order n > 3200) from petawatt class laser-solid interactions is presented, exhibiting relativistic limit efficiency scaling (eta similar to n(-2.5)-n(-3)) at multi-keV energies. This scaling holds up to a maximum order, n(RO)similar to 8(1/2)gamma(3), where gamma is the relativistic Lorentz factor, above which the first evidence of an intensity dependent efficiency rollover is observed. The coherent nature of the generated harmonics is demonstrated by the highly directional beamed emission, which for photon energy h nu > 1 keV is found to be into a cone angle similar to 4 degrees, significantly less than that of the incident laser cone (20 degrees).

  • Item type:Article
    ID code:31309
    Dates:
    Date
    Event
    24 August 2007
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:13 Jul 2011 08:56
    Last modified:08 Apr 2024 19:08
    URI:https://strathprints.strath.ac.uk/id/eprint/31309
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