The RHIC polarized H{sup −} ion source

Journal Article · Mon Feb 15 04:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4932392· OSTI ID:22483003

Atoian, G.; Raparia, D.; Ritter, J.; Steski, D. ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)

A novel polarization technique had been successfully implemented for the Relativistic Heavy Ion Collider (RHIC) polarized H{sup −} 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{sup −} 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.

• OSTI ID: 22483003
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 87; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAM CURRENTS
BROOKHAVEN RHIC
CHARGE EXCHANGE
COLLIDING BEAMS
GEV RANGE 100-1000
ION BEAMS
ION SOURCES
MAGNETIC FIELDS
POLARIZATION
POLARIZED BEAMS
PROTON BEAMS
SOLENOIDS
SYNCHROTRONS