论文信息 - Phase space and coherence properties of an x-ray FEL source

Phase space and coherence properties of an x-ray FEL source

In recent years, substantial exploratory studies have been conducted on the source properties of idealized Angstrom- wavelength Free-Electron Lasers (FELs) operating in the Self- Amplified Spontaneous Emission (SASE) regime. With the more recent advent of dedicated design studies aimed at developing SASE FEL R&D facilities, attention has focused on developing more realistic descriptions of the FEL source taking into account various anticipated departures of the electron beam from ideality. In this paper we extend prior statistical descriptions of the SASE FEL source to enable the systematic inclusion of the effects of correlated variations of the electron beam's phase-space parameters vs, e.g., longitudinal position in the bunch. Selected practical consequences of incorporating the extended source parameter space in the development or design of coherence-related methods and instruments are discussed.

Roman Tatchyn | John Arthur

[1] C. Pellegrini,et al. Introduction to the physics of the free electron laser , 1988 .

[2] Li,et al. Scaling function for free-electron-laser gain including alternating-gradient focusing. , 1995, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[3] Pellegrini,et al. Spectrum, temporal structure, and fluctuations in a high-gain free-electron laser starting from noise. , 1994, Physical review letters.

[4] Gil Travish. Performance simulation and parameter optimization for high gain short wavelength FEL amplifiers , 1995 .

[5] F. Casagrande,et al. Instability threshold, quantum initiation and photonstatistics in high-gain free electron lasers , 1985 .

[6] Freund. Nonlinear theory of short-wavelength free-electron lasers. , 1995, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[7] William M. Fawley. Output characteristics of SASE-driven short-wavelength FELs , 1997, Photonics West.

[8] Roman Tatchyn,et al. The LCLS: A fourth generation light source using the SLAC linac , 1995 .

[9] Xie,et al. Three-dimensional theory of the small-signal high-gain free-electron laser including betatron oscillations. , 1992, Physical review. A, Atomic, molecular, and optical physics.