The GBAR antimatter gravity experiment
2015 (English)In: Hyperfine Interactions, 2015, Vol. 233, no 1-3, 21-27 p.Conference paper (Refereed)Text
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.
Antimatter, Gravity, Antihydrogen, Positronium
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-281012DOI: 10.1007/s10751-015-1154-8ISI: 000360770700004OAI: oai:DiVA.org:uu-281012DiVA: diva2:912480
5th International Conference on Exotic Atoms and Related Topics (EXA), SEP 15-19, 2014, Austrian Acad Sci, Vienna, AUSTRIA