Table 1 Electron beam and undulator parameters.
From: Full characterization of superradiant pulses generated from a free-electron laser oscillator
Parameters | Thermionic | Photocathode |
|---|---|---|
Injected electron beam energy | 28.5 MeV | 28.5 MeV |
Electron bunch charge | 55 pC maximum | ~ 220 pC |
Macropulse duration | 6.8 μs | 7 μs |
Electron bunch repetition rate | 2856 MHz | 29.75 MHz |
Undulator K-value | 1.35 | 1.35 |
Undulator period length | 33 mm | 33 mm |
Number of undulator periods | 52 | 52 |
Energy extraction efficiency | ~ 5% | ~ 9% |
