OPTICALLY-PUMPED POLARIZED 3HE++ ION SOURCE AND ABSOLUTE POLARIMETER DEVELOPMENT AT RHIC
A. Zelenski, G. Atoian*, E. Beebe, S. Ikeda, J. Maxwell, R. Milner, M. Okamura, A. Poblaguev, D. Raparia, J. Ritter, A. Sukhanov and S. Trabocchi
The proposed polarized 3He++ acceleration in RHIC and the future Electron-Ion Collider will require about 2×1011 ions in the source pulse. A new technique had been proposed for production of high intensity polarized 3He++ ion beams. It is based on ionization and accumulation of the 3He gas (polarized by metastability-exchange optical pumping and in the 5 T high magnetic field) in the existing Electron Beam Ion Source (EBIS). A novel 3He cryogenic purification and storage technique was developed to provide the required gas purity. The status of the Extended EBIS upgrade project is presented.
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