The PEPPo method for polarized positrons and PEPPo II

Cardman, Lawrence S.

doi:10.1063/1.5040220

Title: The PEPPo method for polarized positrons and PEPPo II

Journal Article · Tue May 01 00:00:00 EDT 2018 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.5040220· OSTI ID:1440322

Cardman, Lawrence S. ^[1]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

The Polarized Electrons for Polarized Positrons (PEPPo) experiment at the injector of the Continuous Electron Beam Accelerator Facility demonstrated for the first time the efficient transfer of polarization from electrons to positrons via a two-step process: polarized bremsstrahlung radiation is induced by a polarized electron beam in a high-Z target; then the polarized bremsstrahlung produces polarized positrons via the pair-production process in the same target. Positron polarization up to 82% was measured for an initial electron beam momentum of 8.19 MeV/c, limited only by the electron beam polarization of 85%. This technique extends polarized positron capabilities from GeV to MeV electron beams, and opens access to polarized positron beam physics to a wide community. We present the results of the PEPPo experiment and outline tentative plans for a follow-up experiment that would investigate key aspects of an approach based on PEPPo as a polarized positron source for the 12 GeV Upgrade of CEBAF.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: for the PEPPo Collaboration

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1440322

Report Number(s):: JLAB-PHY-18-2632; DOE/OR/23177-4331; TRN: US1900816

Journal Information:: AIP Conference Proceedings, Vol. 1970, Issue 1; Conference: JPOS17,12-15 Sep 2017. Newport News, VA, USA; ISSN 0094-243X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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References (16)

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