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Overcoming depolarizing resonances in the AGS with two helical partial siberian snakes

Overcoming depolarizing resonances in the AGS with two helical partial siberian snakes

Authors :
A.U. Luccio
C.J. Gardner
M. Bai
F. Lin
Nicholaos Tsoupas
J.W. Glenn
W.W. MacKay
S. Tepikian
H. Huang
Kevin Brown
K. Yip
Keith Zeno
T. Roser
L. Ahrens
Source :
2007 IEEE Particle Accelerator Conference (PAC).
Publication Year :
2007
Publisher :
IEEE, 2007.

Abstract

Dual partial snake scheme has provided polarized proton beams with 1.5 times 1011 intensity and 65% polarization for the relativistic heavy ion collider (RHIC) spin program. To overcome the residual polarization loss due to horizontal resonances in the Brookhaven alternating gradient synchrotron (AGS), a new string of quadrupoles have been added. The horizontal tune can then be set in the spin tune gap generated by the two partial snakes, such that horizontal resonances can also be avoided. This paper presents the accelerator setup and preliminary results.

Details

Database :
OpenAIRE
Journal :
2007 IEEE Particle Accelerator Conference (PAC)
Accession number :
edsair.doi...........790e5b1e014bfb345c491e13f991d431
Full Text :
https://doi.org/10.1109/pac.2007.4440762