Measurement of 3He++ Polarization at 5.3 MeV via Scattering with an Unpolarized 4He Target
Abstract
Since 2012, a BNL-MIT collaboration has worked to develop a polarized 3He ion source for the Relativistic Heavy Ion Collider (RHIC) using the existing Electron Beam Ionization Source (EBIS). 3He atoms are polarized using optical pumping at high field and injected as neutral atoms into the EBIS. A critical issue is the demonstration that the polarization of the extracted 3He++ ions from the source is high. In 2014, a concept to measure the nuclear polarization was developed in this paper. Since then, the development of the polarized 3He ion source has progressed, the polarimeter is under construction, and the demonstration experiment is expected to take place in the next several years.
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