PoS - Proceedings of Science
Volume 324 - XVII International Workshop on Polarized Sources, Targets & Polarimetry (PSTP2017) - Polarized ion sources
Polarized 3He++ Ion Source for RHIC and an EIC
M. Musgrave*, R. Milner, G. Atoian, E. Beebe, S. Kondrashev, A. Pikin, D. Raparia, J. Ritter, A. Zelenski, J. Maxwell  on behalf of the BNL-MIT Polarized 3 He Ion Source Collaboration
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Pre-published on: May 31, 2018
Published on: June 14, 2018
The capability of accelerating a polarized $^3$He ion beam in RHIC would demonstrate an effective polarized neutron beam for the study of new high-energy QCD studies of nucleon structure. This development would be particularly beneficial for the future plans of an Electron Ion Collider (EIC), which could use a polarized $^3$He ion beam to probe the spin structure of the neutron. The proposed polarized $^3$He ion source is based on the Electron Beam Ion Source (EBIS) currently in operation at Brookhaven National Laboratory (BNL). $^3$He gas would be polarized within the 5 T field of the EBIS solenoid via Metastability Exchange Optical Pumping (MEOP) and then pulsed into the EBIS vacuum and drift tube system where the $^3$He will be ionized by the 10 Amp electron beam. The goal of the polarized $^3$He ion source is to achieve $2.5 \times 10^{11}$ $^3$He$^{++}$/pulse at 70\% polarization. An upgrade of the EBIS is currently underway at BNL. The EBIS capability to produce polarized $^{3}$He$^{++}$ is being developed through a collaboration between BNL and MIT.
DOI: https://doi.org/10.22323/1.324.0020
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