Design of a 7 MeV/u, 217 MHz Injector Linac for Therapy Facilities

Design ion C (A/q = 3) Operating frequency 216.816 MHz Final beam energy 7 MeV/u Pulse currents after stripper ≈ 100 eμA C ≈ 0.7 mA protons Beam pulse length ≤ 200 μs @ ≤ 5 Hz Duty cycle ≤ 0.1 % Norm. transverse exit beam emittances (95%) 1 ≈ 0.8 π mm mrad Exit momentum spread 1 ±0.15 % Total injector length 2 ≈ 13 m 1 Not including emittance growth effects in the stripper foil. 2 Including the ion sources and up to the foil stripper.