The E166 experiment: Development of an undulator-based polarized positron source for the international linear collider
| Autor: | David Walz, W. M. Bugg, S.C. Berridge, E. Reinherz-Aronis, C. Hast, G. R. Bower, J. C. Sheppard, R. Iverson, F.-J. Decker, V. Gharibyan, T. Schweizer, R. Dollan, S. Riemann, Hermann Kolanoski, Y. Efrimenko, V. Bharadwaj, Gideon Alexander, K. P. Schüler, Thomas Lohse, Z. M. Szalata, P. Pahl, Achim Stahl, Y. Batygin, Alexander Mikhailichenko, J. Kovermann, Kirk T. McDonald, A. W. Weidemann, D. J. Scott, A. Schälicke, Gudrid Moortgat-Pick, R. Pöschl, K. Laihem |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Antiparticle Photon International Linear Collider Astrophysics::High Energy Astrophysical Phenomena General Physics and Astronomy Polarimeter Particle accelerator Undulator law.invention Nuclear physics Positron law Physics::Accelerator Physics ddc:530 High Energy Physics::Experiment Circular polarization |
| Zdroj: | Pram¯ana 69, 1165 (2007). doi:10.1007/s12043-007-0248-5 International Linear Collider Workshop, LCWS06, Bangalore, India, 2006-03-09-2006-03-13 |
| ISSN: | 0973-7111 0304-4289 |
| DOI: | 10.1007/s12043-007-0248-5 |
| Popis: | A longitudinal polarized positron beam is foreseen for the international linear collider (ILC). A proof-of-principle experiment has been performed in the final focus test beam at SLAC to demonstrate the production of polarized positrons for implementation at the ILC. The E166 experiment uses a 1 m long helical undulator in a 46.6 GeV electron beam to produce a few MeV photons with a high degree of circular polarization. These photons are then converted in a thin target to generate longitudinally polarized e + and e −. The positron polarization is measured using a Compton transmission polarimeter. The data analysis has shown asymmetries in the expected vicinity of 3.4% and ∼1% for photons and positrons respectively and the expected positron longitudinal polarization is covering a range from 50% to 90%. |
| Databáze: | OpenAIRE |
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