Ion polarization control in MEIC rings using small magnetic field integrals

Ya S. Derbenev, F. Lin, V. S. Morozov, Y. Zhang, A. M. Kondratenko, M. A. Kondratenko, Yu N. Filatov

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

Abstract

The Electron-Ion Collider (EIC) proposed by Jefferson Lab is designed to provide high polarization of both colliding beams. In comparison to conventional circular colliders, its figure 8 shaped rings provide a unique capability to control the polarization of any particle species including deuterons by using small magnetic field integrals. This expands the experimental opportunities at EIC. We present schemes for preserving the particle polarization during acceleration in the pre-booster and large booster. We also present schemes for controlling the ion polarization up to the energy of 100 GeV in the collider ring that allow one to adjust the beam polarization in any orientation in its experimental straights. The deuteron polarization is controlled by weak solenoids while the proton polarization is controlled by weak radial fields. The components of these schemes are optically transparent to the orbital motion when integrated into the magnetic structure of the rings. We use the spin response function formalism to evaluate the zeroth harmonic of the spin perturbation and investigate the possibility of its compensation. For control of the proton polarization in the high-energy stage at energies above 100 GeV, we plan to use the conventional approach of Siberian snakes and spin rotators.

Original languageEnglish
Article number026
JournalProceedings of Science
Volume09-13-September-2013
StatePublished - Jun 18 2014
Externally publishedYes
Event15th International Workshop on Polarized Sources, Targets, and Polarimetry, PSTP 2013 - Charlottesville, United States
Duration: Sep 9 2013Sep 13 2013

Funding

Authored by Jefferson Science Associates LLC under U.S. DOE Contract No. DE-AC05-06OR23177 and DE-AC02-06CH11357. The U.S. Government retains a non-exclusive, paidup, irrevocable, world-wide license to publish or reproduce this manuscript for U.S. Government purposes.

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