Improved orotron performance in the 50- to 75-GHz frequency region
Abstract
New experimental results for the Harry Diamond Laboratories (HDL) orotron, a Smith-Purcell free-electron laser, have been obtained. Emphasis was placed on improving the 100-mW output power previously obtained with this device by using a new, more powerful ribbon-beam electron gun and a new open resonator. The orotron was tuned continuously from about 50 to 75 GHz on a TEM(208) Fabry-Perot mode; more than a watt of output power was measured on this mode. Considerably more power, approximately 5 W, was obtained at 65.66 GHz on a TEM(209) mode. Oscillation of the orotron was also observed on backward wave modes. In addition, it was found that improvements in beam quality lead to higher power orotron operation.
- Publication:
-
IEEE Transactions on Electron Devices
- Pub Date:
- October 1982
- DOI:
- 10.1109/T-ED.1982.20930
- Bibcode:
- 1982ITED...29.1639W
- Keywords:
-
- Electron Guns;
- Free Electron Lasers;
- Laser Modes;
- Laser Outputs;
- Design Analysis;
- Laser Cavities;
- Electronics and Electrical Engineering