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Towards antihydrogen trapping and spectroscopy at ALPHA
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2011 (English)In: Hyperfine Interactions, ISSN 0304-3843, E-ISSN 1572-9540, Vol. 199, no 1, 39-48 p.Article in journal (Refereed) Published
Abstract [en]

Spectroscopy of antihydrogen has the potential to yield high-precision tests of the CPT theorem and shed light on the matter-antimatter imbalance in the Universe. The ALPHA antihydrogen trap at CERN’s Antiproton Decelerator aims to prepare a sample of antihydrogen atoms confined in an octupole-based Ioffe trap and to measure the frequency of several atomic transitions. We describe our techniques to directly measure the antiproton temperature and a new technique to cool them to below 10 K. We also show how our unique position-sensitive annihilation detector provides us with a highly sensitive method of identifying antiproton annihilations and effectively rejecting the cosmic-ray background.

Place, publisher, year, edition, pages
2011. Vol. 199, no 1, 39-48 p.
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Physical Sciences
URN: urn:nbn:se:su:diva-72038DOI: 10.1007/s10751-011-0299-3OAI: diva2:488451
Available from: 2012-02-01 Created: 2012-02-01 Last updated: 2012-02-10Bibliographically approved

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Jonsell, Svante
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Department of Physics
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