L. De Salvo

TL;DR: The field evolution is dominated by slippage effects in both cases, and shows the presence of superradiant spikes.

TL;DR: The Collective Atomic Recoil Laser (CARL) as mentioned in this paper unifies the physics of the FEL and of the atomic lasers by demonstrating that a cold beam of two-level particles driven coherently by a counter-propagating resonant wave can amplify exponentially a co-propaging optical probe up to a saturation value through an instability very similar to that of a high gain FEL.

TL;DR: In this article, it was shown that the exponential gain of the fundamental radiation wavelength drives the third-harmonic bunching at a rate which is three times higher than the fundamental wavelength, leading to almost equal saturation bunching parameters on the fundamental and the harmonic wavelength.

TL;DR: In this paper, the authors report on a research and development program underway and in planning at SLAC for addressing critical questions in these areas, including the construction and operation of a linac test stand for developing laser-driven photocathode rf guns with normalized emittances approaching 1 mm-mrad, development of advanced beam compression, stability, and emittance control techniques at multi-GeV energies, and the development of X-ray optics and instrumentation for extracting, modulating, and delivering photons to experimental users.

TL;DR: Pellegrini et al. as discussed by the authors proposed a linac coherent light source (LCLS) using the SLAC linac at wavelengths from about 3 to 100 nm and possibly even shorter wavelengths in the future.