Abstract
The lasing of a Van de Graaff electrostatic accelerator - free-electron laser (EA-FEL) with an internal cavity is reported. An EA-FEL employing an internal cavity is a FEL configuration that has a potential to operate at high average power, high frequency, and possibly in a continuous wave (cw) mode. The initial lasing provided a pulsed radiation power of 1 kW at 100.5 GHz frequency. The FEL operated with a 1.4 A, 1.4 MeV electron beam in a recirculation (depressed collector) configuration. It utilizes a high quality (Q≈30 000) Talbot effect resonator and a Halbach-type wiggler placed internally in the center of the accelerator tank. Nonlinear features of the oscillation power buildup and decay near saturation and mode hopping were observed and are interpreted.
| Original language | English |
|---|---|
| Pages (from-to) | 3776-3778 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 71 |
| Issue number | 26 |
| DOIs | |
| State | Published - 29 Dec 1997 |
| Externally published | Yes |