Simulation of a standingwave freeelectron laser
Abstract
The standingwave freeelectron laser (FEL) differs from a conventional linearwiggler microwave FEL in using irises along the wiggler to form a series of standingwave cavities and in reaccelerating the beam between cavities to maintain the average energy. The device has been proposed for use in a twobeam accelerator (TBA) because microwave power can be extracted more effectively than from a travelingwave FEL. The standingwave FEL is modeled in the continuum limit by a set of equations describing the coupling of a onedimensional beam to a TE(sub 01) rectangularwaveguide mode. Analytic calculations and numerical simulations are used to determine the time variation of the reacceleration field and the prebunching required so that the final microwave energy is the same in all cavities. The microwave energy and phase are found to be insensitive to modest spreads in the beam energy and phase and to errors in the reacceleration field and the beam current, but the output phase appears sensitive to beamenergy errors and to timing jitter.
 Publication:

Presented at the Linear Accelerator Conference
 Pub Date:
 September 1990
 Bibcode:
 1990liac.confR...9S
 Keywords:

 Free Electron Lasers;
 Mathematical Models;
 Microwaves;
 Rectangular Waveguides;
 Simulation;
 Standing Waves;
 Wiggler Magnets;
 Analysis (Mathematics);
 Beam Currents;
 Computerized Simulation;
 Continuums;
 Microwave Amplifiers;
 Phase Error;
 Vibration;
 Lasers and Masers