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Accession Number DE2012-1045201
Title Undulator Based Polarized Positron Source for CLIC.
Publication Date Jul 2012
Media Count 3p
Personal Author J. Sheppard L. Rinolfi W. Gai W. Liu
Abstract A viable positron source scheme is proposed that uses circularly polarized gamma rays generated from the main 250 GeV electron beam. The beam passes through a helical superconducting undulator with a magnetic field of (approx) 1 Tesla and a period of 1.15 cm. The gamma-rays produced in the undulator in the energy range between (approx) 3 MeV - 100 MeV will be directed to a titanium target and produce polarized positrons. The positrons are then captured, accelerated and transported to a Pre-Damping Ring (PDR). Detailed parameter studies of this scheme including positron yield, and undulator parameter dependence are presented. Effects on the 250 GeV CLIC main beam, including emittance growth and energy loss from the beam passing through the undulator are also discussed.
Keywords Accelerators
Electron beams
Energy range
Magnetic fields
Poistron sources
Wiggler magnets

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46 - Physics
Corporate Author Stanford Linear Accelerator Center, Menlo Park, CA. Theory Group.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1302
Contract Number DE-AC02-76SF00515

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