Control of trapped ion instabilities in the Fermilab Antiproton Accumulator

Significant progress has been made in the control and understanding of trapped ion induced instability in the Fermilab Antiproton Accumulator. In addition to a clearing electrode system, a novel method of clearing H ions by lightly bunching the beam with RF has been developed. These ion clearing techniques have eliminated the trapped ion induced instability as a limiting factor in antiproton source performance. A brief description of these techniques and why they work is presented