High Energy Hadron Polarimetry
- RIKEN BNL Research Center and Brookhaven National Laboratory (United States)
Proton polarimetry at RHIC uses the interference of electromagnetic (EM) and hadronic scattering amplitudes. The EM spin-flip amplitude for protons is responsible for the proton's anomalous magnetic moment, and is large. This then generates a significant analyzing power for small angle elastic scattering. RHIC polarimetry has reached a 5% uncertainty on the beam polarization, and seems capable of reducing this uncertainty further. Polarized neutron beams are also interesting for RHIC and for a polarized electron-polarized proton/ion collider in the future. In this case, deuterons, for example, have a very small anomalous magnetic moment, making the approach used for protons impractical. Although it might be possible to use quasi-elastic scattering from the protons in the deuteron to monitor the polarization. 3-He beams can provide polarized neutrons, and do have a large anomalous magnetic moment, making a similar approach to proton polarimetry possible.
- OSTI ID:
- 21055229
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 980; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hadron Polarimetry for the Electron-Ion Collider
Results From The RHIC PC CNI Polarimeter for 2003
Related Subjects
BROOKHAVEN RHIC
COLLIDING BEAMS
DEUTERONS
ELASTIC SCATTERING
ELECTRON-NUCLEON INTERACTIONS
ELECTRONS
HELIUM 3
INTERFERENCE
MAGNETIC MOMENTS
NEUTRON BEAMS
NEUTRONS
POLARIMETRY
POLARIZATION
POLARIZATION-ASYMMETRY RATIO
POLARIZED BEAMS
PROTONS
QUANTUM CHROMODYNAMICS
QUASI-ELASTIC SCATTERING
SCATTERING AMPLITUDES
SPIN FLIP