Optically pumped polarized H− ion source for RHIC spin physics

Zelenski, A.; Alessi, J.; Briscoe, Brian; Dutto, G.; Huang, H.; Kponou, A.; Kokhanovski, S.; Klenov, V.; Lehrach, A.; Levy, P.; LoDestro, V.; Mori, Y.; Okamura, M.; Raparia, D.; Ritter, J.; Takeuchi, Tetsuya; Wight, G. W.; Zoubets, V.

doi:10.1063/1.1427669

Cited by 32 publications

(10 citation statements)

References 2 publications

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“…The primary proton source in OPPIS during Runs 2000-2012 was the dc Electron Cyclotron Resonance (ECR) source [6]. The proton beam produced in the ECR source had the comparatively low emission current density and the high beam divergence.…”

Section: High-intensity Optically-pumped Polarized Ion Source At Rhicmentioning

confidence: 99%

Optically-Pumped Polarized H- And 3he++ Ion Sources Development at Rhic

Zelenski¹,

Атоян²,

Beebe³

et al. 2019

Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018)

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The RHIC Optically-pumped Polarized H-Ion Source (OPPIS) upgrade with the atomic beam hydrogen injector and the He-ionizer cell was commissioned for operation in the Run-2013. The use of the high brightness primary proton source resulted in higher polarized beam intensity and polarization delivered for injection to Linac-Booster-AGS-RHIC accelerator complex. The proposed polarized 3He ++ acceleration in RHIC and future electron-ion collider (eRHIC) will require about 2•10 11 ions in the source pulse. A new technique had been proposed for production of high intensity polarized 3He ++ ion beam. It is based on ionization and accumulation of the 3He gas (polarized by optical-pumping and metastability-exchange technique in the high magnetic field of a 5.0 T) in the Electron Beam Ion Source (EBIS). We present a status of the 3He ++ ion source development.

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Section: High-intensity Optically-pumped Polarized Ion Source At Rhicmentioning

confidence: 99%

Optically-Pumped Polarized H- And 3he++ Ion Sources Development at Rhic

Zelenski¹,

Атоян²,

Beebe³

et al. 2019

Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018)

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“…The spin structure of proton [1,2] is studied in RHIC with collisions of high-energy polarized proton beams. The spin polarized proton beam is generated by an optically pumped polarized ion source (OPPIS) [15], accelerated in the linac, the booster, the AGS and then injected into either of the two RHIC rings (denoted as "blue" and "yellow") [16]. During beam acceleration, the spin polarization may not be preserved due to depolarizing resonances [3,17,18].…”

Section: A Polarization Preservation During Beam Transport In Rhicmentioning

confidence: 99%

Minimization of spin tune spread for preservation of spin polarization at RHIC

Liu

Kewisch

Huang

et al. 2019

Phys. Rev. Accel. Beams

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The spin structure of the proton is one of the unsolved problems in physics. The Relativistic Heavy Ion Collider (RHIC) Spin Physics Program has been conducting research to investigate the spin structure by colliding high energy polarized proton beams. Maintaining high spin polarization while achieving high luminosity is critical for this program. Two of the challenges related to the program are to maintain spin polarization during spin flipping, a process designed to reduce systematic errors in spin asymmetry measurements, and during beam acceleration from the low energy source to the high energy collision experiment. Recently, a modification of the accelerator's magnet configuration (optics) was developed for reducing the spin tune spread. With the new optics implemented, higher spin flipping efficiency was achieved at both injection and top beam energies. The spin tune spread was also minimized during beam acceleration and the transmission efficiency of spin polarization was evaluated. In this report the modifications needed for minimizing the spin tune spread and their impact on the global beam optics are described.

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“…12 In this source an ECRtype source produces a primary proton beam of 2.8-3.0 keV energy, which is converted to electron-spin polarized H atoms by electron pickup in an optically pumped Rb vapor cell. Electrostatic deflection plates downstream of the polarized alkali remove any surviving H + or other charged species.…”

Section: Optically Pumped Polarized H − Ion Source At Rhicmentioning

confidence: 99%

Review of polarized ion sources (invited)

Zelenski

2010

Review of Scientific Instruments

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Recent progress in polarized ion sources development is reviewed. New techniques for production of polarized H(-) ion (proton), D(-) (D(+)), and (3)He(++) ion beams are discussed. Feasibility studies of these techniques are in progress at BNL and other laboratories. Polarized deuteron beams will be required for the polarization program at the Dubna Nuclotron and at the deuteron electric dipole moment experiment at BNL. Experiments with polarized (3)He(++) ion beams are a part of the experimental program at the future electron ion collider.

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Optically pumped polarized H− ion source for RHIC spin physics

Cited by 32 publications

References 2 publications

Optically-Pumped Polarized H- And 3he++ Ion Sources Development at Rhic

Optically-Pumped Polarized H- And 3he++ Ion Sources Development at Rhic

Minimization of spin tune spread for preservation of spin polarization at RHIC

Review of polarized ion sources (invited)

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