Beam manipulation with an RF dipole

Author

Bei, M.

Author_Institution

Brookhaven Nat. Lab., Upton, NY

Volume

1

fYear

1999

fDate

1999

Firstpage

387

Abstract

Coherent betatron motion adiabatically excited by an RF dipole has been successfully employed to overcome strong intrinsic spin depolarization resonances in the AGS, while a solenoid partial snake has been used to correct imperfection spin resonances. The experimental results showed that a full spin flip was obtained in passing through an intrinsic spin resonance when all the beam particles were forced to oscillate coherently at a large amplitude without diluting the beam emittance. With this method, we have successfully accelerated polarized beam up to 23.5 GeV/c. A new type of second order spin resonances was also discovered. As a non-destructive manipulation, this method can also be used for nonlinear beam dynamics studies and beam diagnosis such as measuring phase advance and betatron amplitude function

Keywords

beam handling techniques; colliding beam accelerators; particle beam stability; proton accelerators; synchrotrons; AGS; RF dipole; beam diagnosis; beam manipulation; betatron amplitude function; coherent betatron motion; imperfection spin resonances; intrinsic spin resonance; nonlinear beam dynamics studies; phase advance; second order spin resonances; solenoid partial snake; strong intrinsic spin depolarization resonances; Acceleration; Accelerator magnets; Linear accelerators; Magnetic fields; Magnetic resonance; Manipulator dynamics; Particle accelerators; Particle beams; Polarization; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795712

Filename

795712