Abstract
A new free-electron laser experiment has been designed at NRL to operate at millimeter wavelengths using a collective beam-wave interaction. Critical features of the experiment include an apertured diode which provides a low-emittance electron beam, a wiggler magnet with adiabatic entrance and exit, and an operational domain centered around the wiggler-guide field gyroresonance. With the experiment configured as a superradiant amplifier, the effects of the gyroresonance on beam dynamics and the beam-wave interaction have been studied. Measurements indicate a peak power production of 35 MW at 4 mm with an electronicefficiency of 2.5 percent. Aspects of the experimentaldesign are discussed, and the results of a parametric study of the power dependence on the fields are presented. Detailed calculations (both analytic and computational) have been performed to analyze theli near and nonlinear effects in the experiment. The results of these calculations are shown to be in good agreement with laboratory measurements.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 346-356 |
| Number of pages | 11 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 19 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1983 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering