Polarized Gamma-Source Based on Compton Backscattering in a Laser Cavity

Journal Article · Mon Nov 27 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2409194· OSTI ID:20898733

Pogorelsky, I V; Yakimenko, V ^[1]

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1. Accelerator Test Facility, Brookhaven National Laboratory, 820, Upton, NY 11973 (United States)

We propose a Compton gamma-source for generating a polarized positron beam for the next generation of electron-positron colliders, such as the International Linear Collider (ILC) and the Compact Linear Collider (CLIC). This 40-MeV polarized gamma-source is based on inverse Compton scattering inside a picosecond CO2 laser cavity from electron bunches produced by a 4-GeV linac. In a separate experiment, we identified and experimentally verified the optimum conditions for generating one gamma photon per every electron. After multiplication at several consecutive interaction points, the gamma-rays so produced will be stopped on a target, thereby creating a copious numbers of circularly polarized positrons. We address the practical feasibility of having an intra-cavity Compton polarized positron source as the injector for these new colliders.

• OSTI ID: 20898733
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 877; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BACKSCATTERING
CARBON DIOXIDE LASERS
COMPTON EFFECT
ELECTRON BEAMS
GAMMA RADIATION
GAMMA SOURCES
GEV RANGE 01-10
LASER CAVITIES
LINEAR COLLIDERS
MEV RANGE 10-100
PHOTONS
POSITRON BEAMS
POSITRON SOURCES