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The GBAR experiment / D. P. van der Werf, Dirk van der Werf

International Journal of Modern Physics: Conference Series, Volume: 30, Start page: 1460263

Swansea University Author: Dirk van der Werf

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DOI (Published version): 10.1142/S2010194514602634

Abstract

The classical Weak Equivalence Principle has not yet been tested using antimatter in matter gravitational fields. The GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment, recently approved by CERN, proposes to measure the free-fall accel- eration of antihydrogen. In this experiment, po...

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Published in: International Journal of Modern Physics: Conference Series
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa19834
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Abstract: The classical Weak Equivalence Principle has not yet been tested using antimatter in matter gravitational fields. The GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment, recently approved by CERN, proposes to measure the free-fall accel- eration of antihydrogen. In this experiment, positive antihydrogen ions will be produced, and subsequently cooled down using laser cooled Be+ ions. Then, when a temperature of around 20 μK has been reached, the excess positron will be detached and the free-fall time will be measured using the antiproton annihilation products. An overview of the experiment will be given together with its present status.
Keywords: Antimatter, antihydrogen, antiproton, positron, positronium, gravity
College: College of Science
Start Page: 1460263