Document Type

Article

Publication Date

2024

DOI

10.1016/j.nima.2024.169224

Publication Title

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume

1062

Pages

169224 (1-13)

Abstract

A polarimeter was constructed to measure the longitudinal polarization of a spin-polarized electron beam at 5 and 7 MeV. The polarimeter takes advantage of Compton scattering between circularly polarized bremsstrahlung photons produced by a longitudinally polarized electron beam striking a copper radiator and the spin-polarized electrons orbiting the iron atoms of an analyzing magnet. This so-called Compton transmission polarimeter is compact and relatively inexpensive compared to Mott-scattering polarimeters because no spin manipulator is required. This work presents the design of the radiator, analyzing magnet, photon detector assembly, and data acquisition system of the Compton transmission polarimeter as well as beam commissioning results performed at the Upgraded Injector Test Facility at Jefferson Lab.

Rights

© 2024 The Authors

This is an open access article under the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND 4.0) License.

Data Availability

Article states: "Data will be made available on request."

Original Publication Citation

Blume, G., Bruker, M., Cuevas, C., Dong, H., Fernandes Neres, B., Ghoshal, P., Gopinath, S., Grames, J., Gregory, S., Hays, G., Galliard, C. L., Marsillac, S., Moffit, B., Nguyen Trung, T., Poelker, M., Suleiman, R., Voutier, E., & Zhang, S. (2024). A Compton transmission polarimeter for DC and SRF electron photo-injectors. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1062, 1-13, Article 169224. https://doi.org/10.1016/j.nima.2024.169224

ORCID

0000-0003-4223-2259 (Blume); 0000-0003-0826-8119 (Marsillac)

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