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Zelenski A, Atoian G, Raparia D, et al. The RHIC polarized H⁻ ion source. Rev Sci Instrum. 2016;87(2):02B705doi: 10.1063/1.4932392.
Zelenski, A., Atoian, G., Raparia, D., Ritter, J., & Steski, D. (2016). The RHIC polarized H⁻ ion source. The Review of scientific instruments, 87(2), 02B705. https://doi.org/10.1063/1.4932392
Zelenski, A, et al. "The RHIC polarized H⁻ ion source." The Review of scientific instruments vol. 87,2 (2016): 02B705. doi: https://doi.org/10.1063/1.4932392
Zelenski A, Atoian G, Raparia D, Ritter J, Steski D. The RHIC polarized H⁻ ion source. Rev Sci Instrum. 2016 Feb;87(2):02B705. doi: 10.1063/1.4932392. PMID: 26932068.
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Rev Sci Instrum. 2016 Feb;87(2):02B705. doi: 10.1063/1.4932392.

The RHIC polarized H⁻ ion source.

The Review of scientific instruments

A Zelenski, G Atoian, D Raparia, J Ritter, D Steski

Affiliations

  1. Brookhaven National Laboratory, Upton, New York 11973, USA.

PMID: 26932068 DOI: 10.1063/1.4932392

Abstract

A novel polarization technique had been successfully implemented for the Relativistic Heavy Ion Collider (RHIC) polarized H(-) ion source upgrade 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 external source) in the He-gaseous ionizer cell. Further proton polarization is produced in the process of polarized electron capture from the optically pumped Rb vapor. The use of high-brightness primary beam and large cross sections of charge-exchange cross sections resulted in production of high intensity H(-) ion beam of 85% polarization. The source very reliably delivered polarized beam in the RHIC Run-2013 and Run-2015. High beam current, brightness, and polarization resulted in 75% polarization at 23 GeV out of Alternating Gradient Synchrotron (AGS) and 60%-65% beam polarization at 100-250 GeV colliding beams in RHIC.

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