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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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).
ORCID iDs
Dromey, B., Kar, S., Bellei, C., Carroll, D.C., Clarke, R.J., Green, J.S., Kneip, S., Markey, K. and McKenna, P. ORCID: https://orcid.org/0000-0001-8061-7091;-
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Item type: Article ID code: 31309 Dates: DateEvent24 August 2007PublishedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 13 Jul 2011 08:56 Last modified: 14 Sep 2024 01:06 URI: https://strathprints.strath.ac.uk/id/eprint/31309