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Parameters of ROAD high-current electron linear accelerator for X-ray FLASH therapy.
| System | ROAD | Conventional [18] |
|---|---|---|
| Energy [MeV] | 18 | 6 |
| Pulse length [μs] | 167 | 4 |
| Rep rate [Hz] | 150 | 250 |
| Duty cycle | 2.5% | 0.1% |
| Injected current [A] | 1.3 | 0.5 |
| Transmission | 25% | 25% |
| Peak current [A] | 0.325 | 0.125 |
| Average current [mA] | 8.14 | 0.125 |
| Dose rate factor [Gy/min/mA at 1 m] | 2000 | 120 |
| Dose rate, uncollimated, at 1 m [Gy/s] | 271 | 0.25 |
| Dose delivery efficiency | 25% | 25% |
| Dose rate, collimated, at 80 cm SAD [Gy/s] | 106.0 | 0.10 |
