AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00328139" target="_blank" >RIV/68407700:21340/18:00328139 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1098/rsta.2017.0274" target="_blank" >http://dx.doi.org/10.1098/rsta.2017.0274</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1098/rsta.2017.0274" target="_blank" >10.1098/rsta.2017.0274</a>

Result language

angličtina

Original language name

AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam

Original language description

The efficient production of cold antihydrogen atoms in particle traps at CERN's Antiproton Decelerator has opened up the possibility of performing direct measurements of the Earth's gravitational acceleration on purely antimatter bodies. The goal of the AEgIS collaboration is to measure the value of g for antimatter using a pulsed source of cold antihydrogen and a Moire deflectometer/Talbot-Lau interferometer. The same antihydrogen beam is also very well suited to measuring precisely the ground-state hyperfine splitting of the anti-atom. The antihydrogen formation mechanism chosen by AEgIS is resonant charge exchange between cold antiprotons and Rydberg positronium. A series of technical developments regarding positrons and positronium (Ps formation in a dedicated room-temperature target, spectroscopy of the n = 1-3 and n = 3-15 transitions in Ps, Ps formation in a target at 10K inside the 1 T magnetic field of the experiment) as well as antiprotons (high-efficiency trapping of (p) over bar, radial compression to sub-millimetre radii of mixed e(-)/(p) over bar plasmas in 1 T field, high-efficiency transfer of (p) over bar to the antihydrogen production trap using an in-flight launch and recapture procedure) were successfully implemented. Two further critical steps that are germane mainly to charge exchange formation of antihydrogen-cooling of antiprotons and formation of a beam of antihydrogen-are being addressed in parallel. The coming of ELENA will allow, in the very near future, the number of trappable antiprotons to be increased by more than a factor of 50. For the antihydrogen production scheme chosen by AEgIS, this will be reflected in a corresponding increase of produced antihydrogen atoms, leading to a significant reduction of measurement times and providing a path towards high-precision measurements.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

<a href="/en/project/EE2.3.30.0034" target="_blank" >EE2.3.30.0034: Support of inter-sectoral mobility and quality enhancement of research teams at Czech Technical University in Prague</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Philosophical Transactions of the Royal Socxiety A - Mathematical, Physical and Engineering Sciences

ISSN

1364-503X

e-ISSN

1471-2962

Volume of the periodical

376

Issue of the periodical within the volume

2116

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

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UT code for WoS article

000425631000007

EID of the result in the Scopus database

2-s2.0-85043982453