skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 4-twist helix snake to maintain polarization in multi-GeV proton rings

Journal Article · · Physical Review Accelerators and Beams
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2] more »;  [3] « less
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Science and Technique Lab "Zaryad", Novosibirsk (Russia)
+ Show Author Affiliations

Solenoid Siberian snakes have successfully maintained polarization in particle rings below 1 GeV, but never in multi-GeV rings, because the spin rotation by a solenoid is inversely proportional to the beam momentum. High energy rings, such as Brookhaven’s 255 GeV Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of transverse B-field Siberian snakes directly opposite each other. When it became impractical to use a pair of Siberian Snakes in Fermilab’s 120 GeV/c Main Injector, we searched for a new type of single Siberian snake that could overcome all depolarizing resonances in the 8.9–120 GeV/c range. We found that a snake made of one 4-twist helix and 2 dipoles could maintain the polarization. Here, this snake design could solve the long-standing problem of significant polarization loss during acceleration of polarized protons from a few GeV to tens of GeV, such as in the AGS, before injecting them into multi-hundred GeV rings, such as RHIC.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1402426
Report Number(s):
JLAB-ACP-13-1722; DOE/OR/23177-2789; arXiv:1309.1063; PRABCJ; TRN: US1703238
Journal Information:
Physical Review Accelerators and Beams, Vol. 20, Issue 9; ISSN 2469-9888
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (13)

Polarized beams in high energy storage rings journal November 1984
Depolarisation d'un faisceau de protons polarises dans un synchrotron journal June 1960
Helical Siberian snakes conference January 1989
Polarized Proton Collisions at 205 GeV at RHIC journal May 2006
Orbits and fields in the helical wiggler journal July 1977
Precession of the Polarization of Particles Moving in a Homogeneous Electromagnetic Field journal May 1959
Acceleration and storage of polarized beams conference January 1978
First test of the Siberian snake magnet arrangement to overcome depolarizing resonances in a circular accelerator journal September 1989
Polarized proton collider at RHIC
  • Alekseev, I.; Allgower, C.; Bai, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 2-3 https://doi.org/10.1016/S0168-9002(02)01946-0
journal March 2003
Acceleration of polarized protons to 22 GeV/ c and the measurement of spin-spin effects in p ↑ + p ↑ →p+ p journal January 1989
Spin Dependence of High- P ⊥ 2 Elastic p − p Scattering journal November 1978
I. The kinematics of an electron with an axis journal January 1927
Spin Dynamics and Snakes in Synchrotrons book June 1997

Similar Records

Numerical studies of Siberian snakes and spin rotators for RHIC
Technical Report · Mon Apr 17 00:00:00 EDT 1995 · OSTI ID:1402426
Observation of snake resonances at Relativistic Heavy Ion Collider
Conference · Mon Sep 27 00:00:00 EDT 2010 · OSTI ID:1402426
+1 more
Effect of a partial Siberian snake on an {open_quotes}Rf-induced{close_quotes} depolarizing resonance
Journal Article · Thu Apr 01 00:00:00 EST 1993 · Bulletin of the American Physical Society · OSTI ID:1402426

Related Subjects

43 PARTICLE ACCELERATORS