• The E166 experiment: Development of an undulator-based polarized positron source for the international linear collider

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/069/06/1165-1169

• # Keywords

International linear collider; helical undulator; polarized positron; Compton transmission polarimeter.

• # Abstract

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 $\sim 1$% for photons and positrons respectively and the expected positron longitudinal polarization is covering a range from $50$% to 90%.

• # Author Affiliations

1. RWTH Aachen, Germany
2. Cornell University, USA
3. CCLRC Daresbury, UK
4. University of Durham, UK
5. DESY, Hamburg, Germany
6. DESY, Zeuthen, Germany
7. Humboldt University, Germany
8. Princeton University, USA
9. SLAC, USA
10. University of Tel Aviv, Israel
11. University of Tennessee, USA

• # Pramana – Journal of Physics

Volume 94, 2020
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019