Abstract
Recent progress in polarized ion sources development is reviewed. New techniques for production of polarized H[Formula: see text] ion (proton), D[Formula: see text] (D[Formula: see text]) and 3He[Formula: see text] ion beams will be discussed. A novel polarization technique was successfully implemented for the upgrade of the RHIC polarized H[Formula: see text] 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 [Formula: see text] = 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[Formula: see text] source based on BNL Electron Beam Ion Source is also discussed.
Highlights
Polarization is an intrinsic property of photons, electrons, protons, nuclear beams, and the study of polarization effects provides essential information on particle structure and their interactions
The electron-spin polarization of the “fast” H beam is produced either in a charge-exchange process, when primary protons capture polarized electrons from polarized atoms in a vapor cell, or in spin-exchange collisions. This technique is called an “Optically-Pumped Polarized Ion Source” (OPPIS), polarized electrons can be captured from a ferromagnetic foil, or from hydrogen, or an alkali-metal atomic beam polarized by separating magnets.[3]
Summary There are a number of proposals on polarization studies with polarized ion beams at new and existing accelerators and colliders, which will require high-intensity, high polarization proton, deuteron and 3He++ ion beams
Summary
Polarization is an intrinsic property of photons, electrons, protons, nuclear beams, and the study of polarization effects provides essential information on particle structure and their interactions. Polarization asymmetries and parity violation are strong signatures for the identification of the fundamental processes, which are otherwise inaccessible. Such experiments require the maximum available luminosity, and polarization should be obtained as an extra beam quality without sacrificing intensity. High intensity polarized H− ion sources are presently a common choice for high-energy accelerators due to the advantage of stripping injection into. This is an Open Access article published by World Scientific Publishing Company. Experiments with accelerated polarized 3He++ ion beams will be a part of the program at future Electron Ion Collider
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