The TRIUMF KAON Factory

To accelerate the 100 ¿A proton beam from TRIUMF to 30 GeV a chain of 5 fast-cycling synchrotrons and dc storage rings is proposed. 450 MeV H- ions from TRIUMF are injected by stripping into the Accumulator ring. A 50 Hz Booster synchrotron then accelerates the proton pulse to 3 GeV, where the frequency swing is almost complete. In the main tunnel (170 m radius) are the Collector ring, which collects 5 Booster pulse trains, the 10 Hz Driver synchrotron and the dc Extender ring, where beam is stored for slow resonant extraction. The rings use separated function lattices, designed for very high transition energy. Dual frequency magnet power supplies provide a 3:1 rise:fall ratio, reducing the peak rf voltage requirements to 600 kV for the Booster (46-61 MHz) and 2400 kV in the Driver (61-63 MHz). RF beam splitters will be used to program beam bunches between 4 proton lines and vary the pulse spacing from 16 ns to 64 ns.