Spin flipping in RHIC

Author

Bai, M. ; Lehrach, A. ; Luccio, A. ; MacKay, W.W. ; Roser, T. ; Tsoupas, N.

Author_Institution

Brookhaven Nat. Lab., Upton, NY, USA

Volume

3

fYear

2001

fDate

2001

Firstpage

2047

Abstract

At the Relativistic Heavy Ion Collider (RHIC), polarized protons will be accelerated and stored for spin physics experiments. Two full helical snakes will be used to eliminate the depolarization due to imperfection and intrinsic spin resonances. Since no resonances are crossed in RHIC, the beam polarization remains fixed through acceleration. However, in order to reduce systematic errors, the experiment often requires the polarization direction reversed. This paper presents a method of using an ac dipole to obtain a full spin flip in the presence of two full snakes. A similar method of using an rf solenoid for spin flip was tested at IUCF

Keywords

accelerator RF systems; accelerator magnets; electromagnets; particle beam dynamics; particle beam stability; polarisation; proton accelerators; proton beams; synchrotrons; RHIC; Relativistic Heavy Ion Collider; beam polarization; depolarization; dipole; full helical snakes; imperfection; intrinsic spin resonances; magnetic field guidance; perfect planar synchrotron; polarized protons; radiofrequency solenoid; spin flipping; systematic errors; Acceleration; Frequency; Laboratories; Magnetic fields; Magnetic resonance; Particle beams; Physics; Polarization; Protons; Synchrotrons;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.987271

Filename

987271