Microwave instability as a coherent light source
- Brookhaven National Laboratory, Building 725C, Upton, New York 11973 (United States)
We suggest that the coherent radiation observed recently at SURF II and the National Snychrotron Light Source vacuum ultraviolet ring is due to coherent microwave instability or, equivalently, to {open_quotes}microbunching{close_quotes} of the electron beams in the storage rings. We formulate in this paper the problem of microwave instability in the time domain. A linear homogeneous integro-differential equation for the perturbed current distribution is derived to describe the microwave coherent motion inside the electron bunch. For a specific band-limited high-frequency impedance, the equation can be diagonalized analytically and the eigensolution manifests explicitly the characteristics of microbunching. Coherent radiation power is also calculated for this solvable model, assuming the instability to be initiated by the shot noise inherent in the electron beam. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 638772
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 58, Issue 1; Other Information: PBD: Jul 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of Microbunching Instabilities in Modern Recirculating Accelerators
Theory of Microwave Instability and Coherent Synchrotron Radiation in Electron Storage Rings