Undulator-Based Production of Polarized Photons
"Project Title: Undulator-Based Production of Polarized Photons" DOE Contract Number: FG02-04ER41355 Principal Investigator: Prof. Kirk McDonald Period of Performance: 09/10/2004 thru 08/31/2006 This award was to fund Princeton's activity on SLAC experiment E166, "Undulator-Based Production of Polarized Positrons" which was performed at SLAC during June and September 2005. Princeton U. fabricated a magnetic spectrometer for this experiment, and participated in the commissioning, operation, and analysis of the experiment, for which Prof. McDonald was a co-spokesperson. The experiment demonstrated that an intense positron beam with 80% longitudinal polarization could be generated by conversion of MeVenergy circularly polarized photons in a thin target, which photons were generated by passage of high-energy electrons through a helical undulator. This technique has since been adopted as the baseline for the polarized positron source of the proposed International Linear Collider. Results of the experiment have been published in Physical Review Letters, vol 100, p 210801 (2008) [see attached .pdf file], and a longer paper is in preparation.
- Research Organization:
- Princeton Univ., NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- FG02-04ER41355
- OSTI ID:
- 940364
- Report Number(s):
- DOE/ER/41355-1; TRN: US1000937
- Country of Publication:
- United States
- Language:
- English
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The E166 Experiment: Undulator Based Production of Polarized Positrons
Observation of Polarized Positrons from an Undulator-Based Source
Related Subjects
AWARDS
COMMISSIONING
ELECTRONS
LINEAR COLLIDERS
MAGNETIC SPECTROMETERS
PERFORMANCE
PHOTONS
POLARIZATION
POSITRON BEAMS
POSITRON SOURCES
POSITRONS
PRODUCTION
STANFORD LINEAR ACCELERATOR CENTER
polarized photons
longitudinal polarization
high-energy electrons