Compact Proton Injector for Synchrotrons

Compact proton linac comprising two sections of different RFQ structures was designed. The first section is conventional RFQ with output energy 3.5 MeV whereas the second one is RFQ with spatial periodic RF quadrupole focusing. The linac output energy is about 9 MeV. The both structures operate at frequency of 352 MHz. The total length of machine is less than 6 m. The output pulsed beam current is of 40 mA. The design is suitable for NICA injection complex and proton superconducting medical synchrotron.