Resonant extraction parameters for the AGS Booster

Abstract

Brookhaven's AGS Booster is the injector for the AGS. It is being modified to send resonant extracted heavy ions to a new beam line, the Booster Applications Facility (BAF). The design of the resonant extraction system for BAF was described in [1]. This note will give a more detailed description of the system and describe the predicted resonant beam time structure. We will describe tune space manipulations necessary to extract the resonant beam at the maximum Booster rigidity, schemes for performing resonant extraction, and describe the modifications required to perform bunched beam extraction to the BAF facility.

Notes on the Acceleration of Iron Ions for the Booster Applications Facility

“…Iron ions for BAF are extracted from Booster by a new resonant extraction system as detailed in [1,2]. The system consists of two septum magnets, five bump magnets, and four drive sextupoles.…”

“…The ions are extracted from Booster by means of a new resonant extraction system [1,2], and are transported to a target room along a new beamline [3]. The MP7 Tandem Van de Graaff, fed by a pulsed sputter source and connected to Booster by the 840 m TTB (Tandem To Booster) transport line, provides a wide range of ions for the new facility.…”

A high precision model of Booster Tune Control

“…The Booster is used as the pre-injector to the AGS for heavy ion, polarized proton, and high intensity proton operations. In addition, the Booster is currently being modified to supply slow extracted beams to the Booster Applications Facility (BAF) [3]. The Booster is capable of accelerating these various beams up to a maximum rigidity of 17 T-m.…”

“…However, for AGS injection, the Booster never operates higher than about 10 T-m [1]. For BAF operations, the Booster will operate up to the highest rigidity for heavy ion beams and up to 13 T-m for proton beams [3]. In this note we will give a full description of the Booster tune quadrupoles and the arc dipoles.…”