OK-4 Storage Ring FEL Parameters
| Ring Circumference | 107.46 m (central orbit) |
| Operating Energy | 0.2 - 1.2 GeV (with energy ramping) |
| Injection Energy | 0.2 - 0.28 GeV |
| Revolution Frequency | 2.7898 MHz |
| Energy Acceptance | ± 6% |
| Beam Current | 115 mA (in 5 bunches) |
| Single Bunch | 12 mA |
| Horizontal Emittance | 17-19E-9 m*rad |
| Vertical Emittance | < 1E-9 m*rad |
| Bunch Length | < 50 ps |
| Coherent Emission | 193 - 400 nm |