Exotic Dense-Matter States Pumped by a Relativistic Laser Plasma in the Radiation-Dominated Regime

J. Colgan, J. Abdallah, Jr., A. Ya . Faenov, S. A. Pikuz, Erik Wagenaars, Nicola Booth, Ozgur Culfa, Rachel Jane Dance, Roger G. Evans, R. J. Gray, T. Kaempfer, Kate Lancaster, P. McKenna, Andrew Rossall, I. Yu. Skobelev, K.-S. Schulze, I. Uschmann, A. G. zhidkov, Nigel Charles Woolsey

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In high-spectral resolution experiments with the petawatt Vulcan laser, strong x-ray radiation of KK hollow atoms (atoms without n ¼ 1 electrons) from thin Al foils was observed at pulse intensities of 3x10^20 W/cm^2. The observations of spectra from these exotic states of matter are supported by detailed kinetics calculations, and are consistent with a picture in which an intense polychromatic x-ray field, formed from Thomson scattering and bremsstrahlung in the electrostatic fields at the target surface, drives the KK hollow atom production. We estimate that this x-ray field has an intensity of >5x10^18 W/cm^2 and is in the 3 keV range.
Original languageEnglish
Article number125001
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Issue number12
Early online date18 Mar 2013
Publication statusPublished - 22 Mar 2013

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