Radially polarized, half-cycle, attosecond pulses from laser wakefields through coherent synchrotron radiation
Li, F.Y. and Sheng, Z.M. and Chen, M. and L. Yu, L. and Meyer-ter-Vehn, J. and B. Mori, W. and Zhang, J. (2014) Radially polarized, half-cycle, attosecond pulses from laser wakefields through coherent synchrotron radiation. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 90 (4). 043104. ISSN 2470-0053 (https://doi.org/10.1103/PhysRevE.90.043104)
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Abstract
Attosecond bursts of coherent synchrotron-like radiation are found when driving ultrathin relativistic electron disks in a quasi-one-dimensional regime of wakefield acceleration, in which the laser waist is larger than the wake wavelength. The disks of overcritical density shrink radially due to the focusing wake fields, thus providing the transverse currents for the emission of an intense, radially polarized, half-cycle pulse of about 100 attoseconds in duration. The electromagnetic pulse first focuses to a peak intensity 10 times larger ($7\times10^{20}\rm W/cm^2$) than the driving pulse and then emerges as a conical beam. Saturation of the emission amplitudes is derived analytically and in agreement with particle-in-cell simulation. By making use of gas targets instead of solids to form the ultrathin disks, the new scheme allows for high repetition rate required for applications.
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Item type: Article ID code: 50298 Dates: DateEvent23 October 2014Published23 October 2014Published Online7 October 2014AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 12 Nov 2014 16:10 Last modified: 08 Apr 2024 21:40 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/50298