A Quartz Cherenkov Detector for Compton-Polarimetry at Future e+e- Colliders

Abstract

Precision polarimetry is essential for future e+ e- colliders and requires Compton polarimeters designed for negligible statistical uncertainties. In this paper, we discuss the design and construction of a quartz Cherenkov detector for such Compton polarimeters. The detector concept has been developed with regard to the main systematic uncertainties of the polarisation measurements, namely the linearity of the detector response and detector alignment. Simulation studies presented here imply that the light yield reachable by using quartz as Cherenkov medium allows to resolve in the Cherenkov photon spectra individual peaks corresponding to different numbers of Compton electrons. The benefits of the application of a detector with such single-peak resolution to the polarisation measurement are shown for the example of the upstream polarimeters foreseen at the International Linear Collider. Results of a first testbeam campaign with a four-channel prototype confirming simulation predictions for single electrons are presented.

References in corpus (7)

• The role of polarized positrons and electrons in revealing fundamental interactions at the Linear Collider
• A High-Precision Measurement of the Left-Right Z Boson Cross-Section Asymmetry
• Optical Properties of the DIRC Fused Silica Cherenkov Radiator
• Polarimeters and Energy Spectrometers for the ILC Beam Delivery System
• A Complete Order-alpha**3 Calculation of the Cross Section for Polarized Compton Scattering
• Design and Construction of a Cherenkov Detector for Compton Polarimetry at the ILC
• Spin Transport and Polarimetry in the Beam Delivery System of the International Linear Collider

Cited by in corpus (1)

• A Calibration System for Compton Polarimetry at $e^{+}{e}^{-}$ Linear Colliders