Free electron lasers in the x-ray region
Abstract
An x-ray free-electron laser (FEL) must operate with large gain per pass because of the poor quality of available mirrors at x-ray frequencies. Moreover, the effects of inhomogeneous broadening, start-up from noise, coherence development, and quantum recoil can be important in determining whether and how such devices will operate. We present a one-dimensional analysis of the gain regimes for x-ray FEL's and consider the example of a 5Å FEL operating with a uniform wiggler of wavelength 3.2 cm. We also estimate constraints on such a device imposed by effects such as diffractive spreading of the laser beam, energy spread and emittance of the electron beam, and transverse variations in the wiggler field.
- Publication:
-
Free Electron Generation of Extreme Ultraviolet Coherent Radiation
- Pub Date:
- June 1984
- DOI:
- 10.1063/1.34632
- Bibcode:
- 1984AIPC..118..161G
- Keywords:
-
- 42.60.By;
- 41.80.Dd;
- 41.70.+t;
- 07.85.+n;
- Design of specific laser systems