AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements

Amsler, Claude; Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Kawada, Jiro; Kimura, Mitsuhiro; Pistillo, Ciro; Scampoli, Paola; Storey, James William (2014). AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements. European physical journal. D, D68(3), p. 41. EDP Sciences 10.1140/epjd/e2013-40690-3

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AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is an experiment that aims to perform the first direct measurement of the gravitational acceleration g of antihydrogen in the Earth’s field. A cold antihydrogen beam will be produced by charge exchange reaction between cold antiprotons and positronium excited in Rydberg states. Rydberg positronium (with quantum number n between 20 and 30) will be produced by a two steps laser excitation. The antihydrogen beam, after being accelerated by Stark effect, will fly through the gratings of a moir´e deflectometer. The deflection of the horizontal beam due to its free fall will be measured by a position sensitive detector. It is estimated that the detection of about 103 antihydrogen atoms is required to determine the gravitational acceleration with a precision of 1%. In this report an overview of the AEgIS experiment is presented and its current status is described. Details on the production of slow positronium and its excitation with lasers are discussed.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Amsler, Claude; Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Kawada, Jiro; Kimura, Mitsuhiro; Pistillo, Ciro; Scampoli, Paola and Storey, James William

Subjects:

500 Science > 530 Physics

ISSN:

1434-6079

Publisher:

EDP Sciences

Language:

English

Submitter:

Jan Dirk Brinksma

Date Deposited:

21 May 2015 11:44

Last Modified:

12 Oct 2018 08:52

Publisher DOI:

10.1140/epjd/e2013-40690-3

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt

BORIS DOI:

10.7892/boris.68756

URI:

https://boris.unibe.ch/id/eprint/68756

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