Astigmatic effects in linearly polarized, tapered-wiggler, free-electron lasers
Abstract
The energy extraction efficiency of linearly polarized, tapered-wiggler, free-electron lasers is examined for astigmatic elliptical electron and optical beams. The results are compared with those using cylindrically symmetric beams in the low-gain limit. The results indicate that astigmatic optical beams can be employed to improve extraction efficiency. In low-gain systems it is not clear that the introduction of astigmatism into the optical beam provides a practical method of significantly increasing the footprint of the optical beam on a mirror surface and thus providing a solution to problems of mirror loading.
- Publication:
-
Lasers 1983; Proceedings of the International Conference
- Pub Date:
- 1985
- Bibcode:
- 1985lase.conf..263C
- Keywords:
-
- Astigmatism;
- Energy Conversion Efficiency;
- Free Electron Lasers;
- Laser Outputs;
- Linear Polarization;
- Electron Beams;
- Ellipticity;
- Mirrors;
- Normal Density Functions;
- Power Gain;
- Wiggler Magnets;
- Lasers and Masers