Author :
Huang, H. ; Ahrens, L. ; Bai, M. ; Brown, K.A. ; Gardner, C. ; Glenn, J.W. ; Lin, F. ; Luccio, A.U. ; MacKay, W.W. ; Roser, T. ; Tepikian, S. ; Tsoupas, N. ; Yip, K. ; Zeno, K.
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.
Keywords :
beam handling equipment; particle beam extraction; particle beam injection; polarisation; proton accelerators; proton beams; synchrotrons; AGS; Brookhaven Alternating Gradient Synchrotron; RHIC; Relativistic Heavy Ion Collider spin program; accelerator setup; depolarizing resonances; extraction beam lines; helical partial siberian snakes; horizontal resonances; injection beam lines; polarized proton beams; quadrupoles addition; residual polarization loss; Acceleration; Frequency; Gyromagnetism; Magnetic fields; Magnetic resonance; Particle beams; Polarization; Proton accelerators; Synchrotrons; US Department of Energy;
