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Article Dans Une Revue Journal of Instrumentation Année : 2023

A quantitative study of systematic uncertainties due to QED corrections in accurate Compton polarimetry experiments

Résumé

Several new high-energy physics accelerators will exploitbeam polarization as a core part of their program. In several casesthe beam polarization needs to be accurately measured with aprecision better than one per-mille. At this level of precision, α$^{3}$ QED corrections must be accounted for. In this paper, weestimate the related correction for the detectors considered forseveral projects as ILC and FCC-ee. Two different techniques toextract the beam polarization are investigated and found to providecomplementary information. The related measurements are dominated bydifferent sources of systematic uncertainties, either related to QEDcorrections or likely to uncontrolled variations of experimentalconditions at the per-mille level. It is found in particular thatthe measurement of the spatial distribution of photons, besidesexperimental challenges, is more sensitive to QED corrections thanthe technique consisting in measuring electrons spatial and energydistribution.
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Dates et versions

hal-04230145 , version 1 (10-10-2023)

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A Martens, F Mawas, F Zomer. A quantitative study of systematic uncertainties due to QED corrections in accurate Compton polarimetry experiments. Journal of Instrumentation, 2023, 18 (10), pp.P10001. ⟨10.1088/1748-0221/18/10/P10001⟩. ⟨hal-04230145⟩
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