Slow extraction from the KAON factory extender ring

The Extender ring for the proposed KAON Factory at TRIUMF will employ 1/3-integer resonant extraction to spill out the protons slowly and provide experiments with a continuous beam. An array of sextupoles is provided to selectively excite the 3 nu/sub x/ = 34 stopband without disturbing the vertical motion of the beam. A combination of electrostatic and magnetic septa will guide the extracted beam into the beamline. Chromatic extraction, using the natural chromaticity of the ring to shift the tune towards the resonance, or achromatic extraction from a chromaticity-corrected machine using tune-shift quadrupoles, can be used to drive the particles into instability. Results of tracking studies show that by achromatic extraction an extracted emittance of less than 1 π mm-mrad can be achieved