A fourfold Bhabha/Møller polarimeter for positrons/electrons

J. Klinken, van, W.Z. Venema, V.A. Wichers

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    Abstract

    A polarimeter with high statistica power is introduced for relative measurements of the longitudinal polarization of positrons or electrons at kinetic energies above 1 MeV. A fourfold construction improved the statistical power and the instrumental symmetry. In each of the four polarimeters five detectors viewed a cylindrical scatterer of FeCoV. The polarimeters reached an average sensitivity S 0.058, approaching the theoretical optimum of 0.079. A fast data-acquisition system was dedicated to high event rates at small dead time. In case of ß+-polarization measurements the systematic errors were negligible to 10-3 accuracy.
    Original languageEnglish
    Pages (from-to)202-213
    Number of pages12
    JournalNuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Volume286
    Issue number1-2
    DOIs
    Publication statusPublished - 1990

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