Momentum Precooling in the Debuncher Ring for the Fermilab Tevatron-I Project

Abstract

The design of the antiproton source for the Fermilab Tevatron-I project (TeV-I) incorporates two separate rings. The Accumulator Ring uses a stochastic cooling/stacking system to accumulate a sufficient number of antiprotons for use in the Tevatron collider. The Debuncher Ring rotates buckets and debunches antiproton pulses from the production target. This requires, in the Debuncher, a choice of lattice transition energy very near the beam energy, resulting in very narrow spread in the circulation frequency. If the energy spread could be further reduced in the Debuncher before the beam is transferred to the Accumulator, operational improvements would result in: (1) the reduction of stochastic cooling power in the Accumulator; (2) the acceptance of a larger momentum bite of antiprotons in the Debuncher (thus more antiprotons); and (3) the reduction of momentum aperture in the Accumulator. This note describes a quick investigation of the feasibility of precooling within the framework of technically achievable parameters.