Variable-Wiggler Free-Electron-Laser Experiment
Abstract
First results are presented of a free-electron-laser experiment that utilizes a tapered wiggler for efficiency enhancement. The spontaneous spectrum and the electron-beam energy loss due to the free-electron-laser interaction are measured and compared with theory. With a 2.25% magnetic field taper, 12% of the electrons were decelerated by 0.6%, corresponding to a gain of 2.7% and an efficiency of 0.07%, which is 10 times higher than that calculated for a zero taper and otherwise identical conditions.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 1982
- DOI:
- 10.1103/PhysRevLett.48.141
- Bibcode:
- 1982PhRvL..48..141B
- Keywords:
-
- Beam Interactions;
- Free Electron Lasers;
- Relativistic Electron Beams;
- Wiggler Magnets;
- Energy Spectra;
- Laser Outputs;
- Magnetic Fields;
- Trapped Particles;
- Lasers and Masers;
- 42.60.By;
- 52.25.Ps;
- Design of specific laser systems