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Creators/Authors contains: "Rocca, J J"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Physics of Plasmas)
    Low-density meter-scale plasma waveguides produced in meter-scale supersonic gas jets have paved the way for recent demonstrations of all-optical multi-gigaelectronvolt laser wakefield acceleration (LWFA). This paper reviews recent advances by the University of Maryland, which have enabled these results, focusing on the development of elongated supersonic gas jets up to ∼1 m in length, experimental and simulation studies of plasma waveguide formation, and a new three-stage model for relativistic pulse propagation dynamics in these waveguides. We also present results from recent LWFA experiments conducted at the Laboratory for Advanced Lasers and Extreme Photonics at Colorado State University demonstrating high charge, low divergence electron bunches to ∼10 GeV, with laser-to-electron beam efficiency of at least ∼30%. 
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    Free, publicly-accessible full text available May 1, 2026
  2. ; ; ; ; ; ; ; ; ; (, Physical Review Letters)
  3. ; ; ; ; ; ; (, Physical Review A)
    Full Text Available 
  4. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review X)
    Full Text Available 
  5. ; ; ; ; ; ; (, Scientific Reports)
    Abstract Amplification of attosecond pulses produced via high harmonic generation is a formidable problem since none of the amplifiers can support the corresponding PHz bandwidth. Producing the well defined polarization state common for a set of harmonics required for formation of the circularly/elliptically polarized attosecond pulses (which are on demand for dynamical imaging and coherent control of the spin flip processes) is another big challenge. In this work we show how both problems can be tackled simultaneously on the basis of the same platform, namely, the plasma-based X-ray amplifier whose resonant transition frequency is modulated by an infrared field. 
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