Low Voltage Free Electron Laser Development.
Abstract
The two-beam, two-stage Free Electron Laser (FEL)1 offers the possibility of a compact, low voltage FEL (LVFEL). This LVFEL development program has addressed the issues of the first stage of such a LVFEL. During the course of this program we have demonstrated the first plane-polarized mm-wave FEL oscillator. The FEL operates at 31 Ghz with an output power of 60 KW. We have observed radiation on the forward- and backward-wave portions of the dispersion curve. The gain of the device has been estimated, from the signal buildup time, to be approximately 5% for both forward-and backward-wave operation. The line-width of this device has been measured in the forward-wave mode to be 11.7% in voltage space and <4.8% in frequency space. These line-widths correspond well to theoretically predicted values of 3.1 and 3.7%, respectively. The polarization of the device has been measured to be roughly perpendicular to the direction of the wiggler field.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1985
- Accession Number
- ADA152917
Entities
People
- F. A. Dolezal
- R. J. Harvey
Organizations
- HRL Laboratories