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Title: How It's Made - Polarized Proton Beam (444th Brookhaven Lecture)

Abstract

Experiments with polarized beams at RHIC will provide fundamental tests of QCD, and the electro-weak interaction reveal the spin structure of the proton. Polarization asymmetries and parity violation are the strong signatures for identification of the fundamental processes, which are otherwise inaccessible. Such experiments require the maximum available luminosity and therefore polarization must be obtained as an extra beam quality without sacrificing intensity. There are proposals to polarize the high-energy proton beam in the storage rings by the Stern-Gerlach effect or spin-filter techniques. But so far, the only practically available option is acceleration of the polarized beam produced in the source and taking care of polarization survival during acceleration and storage. Two major innovations -- the "Siberian Snake" technique for polarization preservation during acceleration and high current polarized proton sources make spin physics with the high-energy polarized beams feasible. The RHIC is the first high-energy collider, where the "Siberian Snake" technique allowed of polarized proton beam acceleration up-to 250 GeV energy. The RHIC unique Optically Pumped Polarized Ion Source produces sufficient polarized beam intensity for complete saturation of the RHIC acceptance. This polarization technique is based on spin-transfer collisions between a proton or atomic hydrogen beam of a few keVmore » beam energy and optically pumped alkali metal vapors. From the first proposal and feasibility studies to the operational source this development can be considered as example of successful unification of individual scientists ingenuity, international collaboration and modern technology application for creation of a new polarization technique, which allowed of two-to-three order of magnitude polarized beam intensity increase sufficient for loading the RHIC to its full capacity for polarization studies.« less

Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Collider Accelerator Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1004914
Report Number(s):
BNL-83219-2008-CP
TRN: US1104090
DOE Contract Number:
AC02-98CH10886
Resource Type:
Multimedia
Resource Relation:
Conference: Brookhaven Lecture Series: 1960 - Present, Upton, NY (United States), 16 Dec 2008
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 43 PARTICLE ACCELERATORS; ACCELERATION; ALKALI METALS; CAPACITY; FEASIBILITY STUDIES; HYDROGEN; ION SOURCES; LUMINOSITY; PARITY; PHYSICS; POLARIZATION; POLARIZED BEAMS; PRESERVATION; PROTON BEAMS; PROTON SOURCES; PROTONS; QUANTUM CHROMODYNAMICS; SATURATION; SPIN; STORAGE; STORAGE RINGS

Citation Formats

Zelenski, Anatoli. How It's Made - Polarized Proton Beam (444th Brookhaven Lecture). United States: N. p., 2008. Web.
Zelenski, Anatoli. How It's Made - Polarized Proton Beam (444th Brookhaven Lecture). United States.
Zelenski, Anatoli. Tue . "How It's Made - Polarized Proton Beam (444th Brookhaven Lecture)". United States. https://www.osti.gov/servlets/purl/1004914.
@article{osti_1004914,
title = {How It's Made - Polarized Proton Beam (444th Brookhaven Lecture)},
author = {Zelenski, Anatoli},
abstractNote = {Experiments with polarized beams at RHIC will provide fundamental tests of QCD, and the electro-weak interaction reveal the spin structure of the proton. Polarization asymmetries and parity violation are the strong signatures for identification of the fundamental processes, which are otherwise inaccessible. Such experiments require the maximum available luminosity and therefore polarization must be obtained as an extra beam quality without sacrificing intensity. There are proposals to polarize the high-energy proton beam in the storage rings by the Stern-Gerlach effect or spin-filter techniques. But so far, the only practically available option is acceleration of the polarized beam produced in the source and taking care of polarization survival during acceleration and storage. Two major innovations -- the "Siberian Snake" technique for polarization preservation during acceleration and high current polarized proton sources make spin physics with the high-energy polarized beams feasible. The RHIC is the first high-energy collider, where the "Siberian Snake" technique allowed of polarized proton beam acceleration up-to 250 GeV energy. The RHIC unique Optically Pumped Polarized Ion Source produces sufficient polarized beam intensity for complete saturation of the RHIC acceptance. This polarization technique is based on spin-transfer collisions between a proton or atomic hydrogen beam of a few keV beam energy and optically pumped alkali metal vapors. From the first proposal and feasibility studies to the operational source this development can be considered as example of successful unification of individual scientists ingenuity, international collaboration and modern technology application for creation of a new polarization technique, which allowed of two-to-three order of magnitude polarized beam intensity increase sufficient for loading the RHIC to its full capacity for polarization studies.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {12}
}

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