Depolarizing Resonance Correction in Polarized Proton Beam Acceleration up to 5.0 GeV at the KEK PS
- 1 June 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (6R)
- https://doi.org/10.1143/jjap.27.1022
Abstract
The research and development of polarized proton acceleration is being carried out at the KEK 12 GeV proton synchrotron. This paper describes the phenomena encountered in accelerating a polarized proton beam up to 5.0 GeV. Besides conventional methods for correcting depolarizing resonance, an adiabatic resonance crossing with pulsed quadruple magnets has been successfully applied to correct strong intrinsic resonances. At present, 90% of the linac polarization has been preserved in the booster synchrotron with reduced accelerating rf voltage to avoid the depolarization by synchrotron oscillation. In the main ring, 90% and 50% of the booster beam polarization was preserved at 3.5 GeV and 5.0 GeV, respectively. The KEK PS is the first cascaded synchrotron which has demonstrated a polarized proton beam.Keywords
This publication has 4 references indexed in Scilit:
- Internal Polarimeters for the Polarized Proton Beam at the KEK 12 GeV PSIEEE Transactions on Nuclear Science, 1985
- Beam polarization at the ZGSNuclear Instruments and Methods in Physics Research, 1983
- Depolarisation d'un faisceau de protons polarises dans un synchrotronNuclear Instruments and Methods, 1960
- Theory of the alternating-gradient synchrotronAnnals of Physics, 1958