D. B. Hopkins

TL;DR: A high-gain, high-extraction-efficiency, linearly polarized free-electron laser amplifier has been operated at 34.6 GHz and results are in good agreement with linear models at small signal levels and nonlinear models at large signal levels.

TL;DR: In this paper, a high-power free electron laser (FEL) was realized using induction linear accelerators (ILA) as the source of the electron beam, which is capable of producing intense currents (102-104A) at moderately high energy (1-50 MeV).

TL;DR: Relativistic klystron technology is used to extract 290 MW of peak power from an induction linac beam, and to power a short 11.4-GHz high-gradient accelerator to measure rf phase stability, field emission, and the momentum spectrum of an accelerated electron beam.

TL;DR: The phase change of an electromagnetic wave propagating through a free-electron laser (FEL) amplifier has been measured and shows a nearly constant phase derivative with increasing wiggler length through the exponential gain region and is in good agreement with analytical theory.

TL;DR: In this paper, the electron laser facility at LLNL has been used to generate high peak powers at 140 GHz, extending the operating range of the device from previous experiments at 35 GHz.