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Characterization and analysis development for the ALPHA-g barrel scintillator Smith, Gareth

Abstract

The ALPHA-g experiment is the current focus of the ALPHA collaboration; it aims to measure the trajectory of antihydrogen atoms in a gravitational field in order to verify the weak equivalence principle for antimatter. It includes a scintillator detector called the Barrel Veto which will measure particle time of flight in an effort to distinguish antihydrogen annihilation products from cosmic ray background. A new analysis framework for BV data is presented. A small-scale replica of the BV was constructed at TRIUMF and used to develop procedures for calibrating corrections for differences in path length and pulse amplitude. These corrections improve the time of flight resolution to approximately 170 ps, which should be sufficient for cosmic ray background rejection.

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