Proposal for a Booster to Raise the Injection Energy of the AGS

摘要

A proposal to insert a small circumference, energy booster between the 200 MeV Linac and the AGS is presented. The possible increase in AGS performance is pointed out. In particular, one can expect an increase in protons on target for the nu program, an increase in anti p flux, an increase in AGS operational reliability and an increase in beam brightness for ISABELLE. In addition, and perhaps most significantly, it could allow rapid current accumulation for ISABELLE with reduced aperture requirement, avoiding altogether the complexities associated with the present rf stacking approach. It is suggested that the existing PPA accelerator can serve as an ideal booster for the AGS complex. Furthermore, this machine is presently available intact. To obtain high brightness beams as well as intense beams, it appears to be necessary to shift to H exp - injection from the Linac to the Booster. In this way, it is conceivable that approximately 10 exp 14 protons per AGS pulse could become a reality. In such an operating mode, extensive rf and shielding modifications would undoubtedly be required. It also appears that AGS beam dumps would become necessary. ISABELLE performance is considered. A possible scenario suggests a bunched beam average luminosity reaching almost 10 exp 33 cm exp -2 sec exp -1 . If debunched, this would fall to approximately 10 exp 32 cm exp -2 sec exp -1 . Also, the simplicity and speed of the proposed operational mode suggests that such performance is in principle the ''day-1-performance''. (ERA citation 03:043491)