Beam Dynamics in a Spectrometer for the Polarized Positron Production Experiment

Technical Report · Wed Apr 19 04:00:00 EDT 2006

DOI:https://doi.org/10.2172/881535· OSTI ID:881535

Batygin, Yuri K

The proposed experiment E-166 at SLAC is designed to demonstrate the possibility of producing longitudinally polarized positrons from circularly polarized photons to be used in future Linear Collider. The experimental set-up utilizes a low emittance 50 GeV electron beam passing through a helical undulator in the Final Focus Test Beam line of the SLAC accelerator. Circularly polarized photons generated by the electron beam in the undulator hit a target and produce electron-positron pairs. The purpose of the post-target spectrometer is to select the positron beam and to deliver it to a polarimeter whilst keeping the positron beam polarization as high as possible. This paper analyzes positron transmission and polarization in the E-166 spectrometer experiment. The positron transmission has a maximum value of 7% for a positron beam energy of 5.5 MeV, while positron polarization is approximately 60%.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 881535
• Report Number(s): SLAC-PUB-11827
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
Accelerators
ACCPHY
BEAM DYNAMICS
ELECTRON BEAMS
LINEAR COLLIDERS
PHOTONS
POLARIMETERS
POLARIZATION
POSITRON BEAMS
POSITRONS
PRODUCTION
SPECTROMETERS
STANFORD LINEAR ACCELERATOR CENTER
TARGETS
WIGGLER MAGNETS