RECTANGULAR ACCELERATING-FOCUSING STRUCTURE HIGH POWER TESTS

We built an accelerating-focusing rectangular cavity biperiodic structure (RCBS) for our 70 MeV RaceTrack Microtron (RTM), which we have tested at high Radio Frequency (RF) power with an electron beam. Our structure, powered by a 2,856 MHz, 6 MW, 48-beam KIU-111A klystron, has its 50 keV, 200 mA prebunched beam injected through a rare earth permanent -magnet. We measured its exiting beam energy spectrum using a 45º bending magnet and its dimensions and emittance using its transition radiation. We obtained the 6 MeV, 100 mA beam with ~2 MW of RF power dissipated in the structure walls.