A Compton transmission polarimeter for DC and SRF electron photo-injectors

Blume, Greg; Bruker, Max; Cuevas, C.; Dong, H.; Fernandes Neres, Benjamin; Ghoshal, P.; Gopinath, S.; Grames, J.; Gregory, S.; Hays, G.; Galliard, C. Le; Marsillac, Sylvain; Moffit, B.; Nguyen Trung, Thi; Poelker, M.; Suleiman, R.; Voutier, Eric; Zhang, S.

doi:10.1016/j.nima.2024.169224

Title: A Compton transmission polarimeter for DC and SRF electron photo-injectors

Journal Article · 05 March 2024 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI: https://doi.org/10.1016/j.nima.2024.169224 · OSTI ID:2323322

^[1];

^[2]; Cuevas, C. ^[2]; Dong, H. ^[2]; Fernandes Neres, Benjamin ^[3]; Ghoshal, P. ^[2]; Gopinath, S. ^[2]; Grames, J. ^[2]; Gregory, S. ^[2]; Hays, G. ^[2]; Galliard, C. Le ^[3];

^[1]; Moffit, B. ^[2]; Nguyen Trung, Thi ^[3]; Poelker, M. ^[2]; Suleiman, R. ^[2];

^[3]; Zhang, S. ^[2]

Old Dominion Univ., Norfolk, VA (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Centre National de la Recherche Scientifique (CNRS), Paris (France). National Inst. of Nuclear and Particle Physics (IN2P3); Université Paris-Saclay, Orsay (France)

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.

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Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-06OR23177; SC0021039

OSTI ID:: 2323322

Alternate ID(s):: OSTI ID: 2323364

Report Number(s):: JLAB-ACC--23-3955; DOE/OR/23177--7259; DE-SC0021039; 824093

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1062; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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