Theory of a nonwiggler collective free electron laser in uniform magnetic field
Abstract
A nonwiggler free electron laser, operating in uniform guide magnetic field, is analyzed. The amplifier problem is solved self-consistently on the basis of the kinetic theory. It is shown that the asymmetry in the azimuthal distribution of the electrons' momentum leads to a coupling between the transverse and the space-charge modes. This, in turn, enhances the gain in the amplifiers. In the case of a cold beam, with the electrons gyrating coherently, the spatial growth in the collective nonwiggler free electron laser (FEL) is comparable to that found in conventional free electron lasers operating in similar regimes.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- March 1983
- DOI:
- 10.1109/JQE.1983.1071849
- Bibcode:
- 1983IJQE...19..327F
- Keywords:
-
- Free Electron Lasers;
- Kinetic Theory;
- Light Amplifiers;
- Magnetic Control;
- Magnetic Fields;
- Power Gain;
- Amplifier Design;
- Electron Distribution;
- Momentum Theory;
- Self Consistent Fields;
- Space Charge;
- Lasers and Masers