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The GBAR antimatter gravity experiment
CEA Saclay, Inst Rech Lois Fondamentales Univers, F-91191 Gif Sur Yvette, France..
ETH, Inst Particle Phys, CH-8093 Zurich, Switzerland..
ENS PSL Res Univ, Univ Paris 04, Lab Kastler Brossel, Coll France,UPMC,CNRS, Paris, France..
CEA Saclay, Inst Rech Lois Fondamentales Univers, F-91191 Gif Sur Yvette, France..
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2015 (English)In: Hyperfine Interactions, 2015, Vol. 233, no 1-3, 21-27 p.Conference paper, Published paper (Refereed)
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Abstract [en]

The GBAR project (Gravitational Behaviour of Anti hydrogen at Rest) at CERN, aims to measure the free fall acceleration of ultracold neutral anti hydrogen atoms in the terrestrial gravitational field. The experiment consists preparing anti hydrogen ions (one antiproton and two positrons) and sympathetically cooling them with Be (+) ions to less than 10 mu K. The ultracold ions will then be photo-ionized just above threshold, and the free fall time over a known distance measured. We will describe the project, the accuracy that can be reached by standard techniques, and discuss a possible improvement to reduce the vertical velocity spread.

Place, publisher, year, edition, pages
2015. Vol. 233, no 1-3, 21-27 p.
Keyword [en]
Antimatter, Gravity, Antihydrogen, Positronium
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-281012DOI: 10.1007/s10751-015-1154-8ISI: 000360770700004OAI: oai:DiVA.org:uu-281012DiVA: diva2:912480
Conference
5th International Conference on Exotic Atoms and Related Topics (EXA), SEP 15-19, 2014, Austrian Acad Sci, Vienna, AUSTRIA
Available from: 2016-03-16 Created: 2016-03-16 Last updated: 2016-03-16Bibliographically approved

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Froelich, Piotr

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