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Accession Number
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DE2012-1045201
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Title
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Undulator Based Polarized Positron Source for CLIC.
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Publication Date
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Jul 2012
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Media Count
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3p
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Personal Author
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J. Sheppard L. Rinolfi W. Gai W. Liu
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Abstract
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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.
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Keywords
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Accelerators
Electron beams
Energy range
Magnetic fields
Poistron sources
Positrons
Targets
Titanium
Wiggler magnets
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Source Agency
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Technical Information Center Oak Ridge Tennessee
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NTIS Subject Category
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46 - Physics
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Corporate Author
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Stanford Linear Accelerator Center, Menlo Park, CA. Theory Group.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1302
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Contract Number
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DE-AC02-76SF00515
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