It is demonstrated by numerical simulation that strongly tapered free-electron laser amplifiers exhibit negligible sideband growth, consistent with the predictions of a recent analytical theory [R.P. Pilla and A. Bhattacharjee, Phys. Plasma 1 (1994) 390]. One-dimensional simulations are presented for a short-wavelength (∼10 μm) amplifier with a quadratically tapered wiggler. For pre-bunched electrons with a phase-spread in the range (1/3-1/2) mod 2π and thermal spread in the range (0.5-1)%, the extraction efficiency lies in the range (50-33)%.
|Original language||English (US)|
|Number of pages||4|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - Jun 11 1996|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics