Cross-field free electron laser instability for a tenuous electron beam

PFC / JA - 82 - 33 Cross - field Free Electron Laser Instability for a Tenuous Electron Beam

The free electron laser instability is investigated for a tenuous circulating electron beam propagating perpendicular to a uniform magnetic field B 0 , and transverse wiggler field modeled by B. sin ky, in planar geometry. Unlike the rippled-field magnetron which operates at Brillouin flow, the present analysis assumes a low-density electron beam with w. 4D '. Making use of a macroscopic cold-f...

Pfc-ja-81-8 Free Electron Laser Instability for a Relativ- Istic Solid Electron Beam in a Helical Wiggler Field

Theory of Free Electron Laser Instability in a Relativistic Annual Electron Beam

A self-consistent theory of the free electron laser instability is developed for a hollow electron beam propagating through an undulator (multiple mirror) magnetic field. The stability analysis is carried out within the framework of the linearized Vlasov-Maxwell equations. It is assumed that the beam is thin, with radial thickness much smaller than the mean beam radius, and that v/yb << 1, wher...

Single-pass High-gain Free Electron Laser Electron Beam Diagnostics

Consensus reached in the last few years that fourth generation light source will most likely be a X-ray or a UV coherent source based on single-pass high-gain free electron laser (FEL), such as Self Amplified Spontaneous Emission (SASE), or seeded high-gain harmonic -generation (HGHG) free electron lasers. High -gain (> 10) required for single-pass FEL puts great constrain on the quality of ele...

Simulation of Laser - Electron Beam Interaction in the Optical Klystron of a Free Electron Laser

The particle optics code GPT [1] has been applied to study the single pass electron beam interaction with an external laser field in the undulator system of a free electron laser. In particular, this code has been used to simulate the laser electron beam interaction in an optical klystron. Micro-bunching as a result of the interaction of the electron bunch with an electromagnetic pulse is prese...