A Full-DC injector for an energy-recovery linac

Hajima, Ryoichi; Minehara, Eisuke; Nagai, Ryoji

Nuclear Instruments and Methods in Physics Research A, 528(1-2), p.340 - 344, 2004/08

https://doi.org/10.1016/j.nima.2004.04.064

We propose a full-DC injector for an energy-recovery linac. The injector is based on a 2MeV DC accelerator commercially available (Dynamitron type) combined with a photo cathode. The bunched beam from the DC accelerator is merged into the ERL loop and injected to a superconducting buncher booster, which accelerates the beam up to 20MeV. The bunch booster is operated in "partial energy-recovery mode", in which we can reduce the capacity of RF main couplers down to 10kW level even for high-average current operation, 100mA. We present a result of beam dynamics simulation and RF system optimization.