Change search
ReferencesLink to record
Permanent link

Direct link
Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap
Show others and affiliations
2012 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 14, 015010- p.Article in journal (Refereed) Published
Abstract [en]

Recently, antihydrogen atoms were trapped at CERN in a magnetic minimum (minimum-B) trap formed by superconducting octupole and mirror magnet coils. The trapped antiatoms were detected by rapidly turning off these magnets, thereby eliminating the magnetic minimum and releasing any antiatoms contained in the trap. Once released, these antiatoms quickly hit the trap wall, whereupon the positrons and antiprotons in the antiatoms annihilate. The antiproton annihilations produce easily detected signals; we used these signals to prove that we trapped antihydrogen. However, our technique could be confounded by mirror-trapped antiprotons, which would produce seemingly identical annihilation signals upon hitting the trap wall. In this paper, we discuss possible sources of mirror-trapped antiprotons and show that antihydrogen and antiprotons can be readily distinguished, often with the aid of applied electric fields, by analyzing the annihilation locations and times. We further discuss the general properties of antiproton and antihydrogen trajectories in this magnetic geometry, and reconstruct the antihydrogen energy distribution from the measured annihilation time history.

Place, publisher, year, edition, pages
2012. Vol. 14, 015010- p.
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-76351DOI: 10.1088/1367-2630/14/1/015010ISI: 000300415700004OAI: diva2:526355
38Available from: 2012-05-11 Created: 2012-05-10 Last updated: 2012-05-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Jonsell, Svante
By organisation
Department of Physics
In the same journal
New Journal of Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 23 hits
ReferencesLink to record
Permanent link

Direct link