Review of Polarized Ion Sources

Recent progress in polarized ion sources development is reviewed. New techniques for production of polarized H − ion (proton), D − (D + ) and 3He + + ion beams will be discussed. A novel polarization technique was successfully implemented for the upgrade of the RHIC polarized H − ion source to higher intensity and polarization. In this technique, a proton beam inside the high magnetic field solenoid is produced by ionization of the atomic hydrogen beam (from an external source) in the He-gas ionizer cell. Polarized electron capture from the optically-pumped Rb vapor further produces proton polarization (Optically Pumped Polarized Ion Source technique). The upgraded source reliably delivered beam for the 2013 polarized run in RHIC at S = 510 GeV. This was a major factor contributing to RHIC polarization increase to over 60 % for colliding beams. Feasibility studies of a new polarization technique for polarized 3He + + source based on BNL Electron Beam Ion Source is also discussed.