Thoughts on polarimetry for ³He beams at RHIC

The Relativistic Heavy Ions Collider (RHIC) has accelerated polarized proton beams for physics since 2001. As part of the future eRHIC program and in order to enhance access to the down quark, a program to accelerate polarized ³He in the AGS and RHIC is envisioned. To that end, a polarized ³He source is being built at MIT. This will be installed on the BNL EBIS source in preparation for injection into the booster and AGS. As an early exercise, in June 2012, unpolarized ³He beams have been accelerated in the AGS. This paper will peruse some potential ideas for ³He polarimetry and calibration that could be utilized at the AGS as well as RHIC. The current proton polarimetry program serves as a guide.