Category: News
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First results from ALPHA-g: Antihydrogen doesn’t fall up!
Today ALPHA released the first set of results from the ALPHA-g apparatus that was added to the ALPHA setup in 2018. In a paper published in Nature today, ALPHA describes how we have observed the effect of gravity on neutral antimatter during its release from our magnetic bottle. To get an impression of how the
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Laser cooling of antihydrogen atoms
On the front page of Nature: ALPHA publishes first laser-cooling of antihydrogen! Go to the publication! News coverage for the publication.
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Investigation of the fine structure of Antihydrogen
On February 19, 2020, ALPHA published the first investigation of the fine structure of Antihydrogen. These measurements of transitions in the 1S-2P manifold, in combination we previous detailed measurements of the 1S-2S transition has allowed us to determine the 2S1/2-2P1/2 splitting (the classic Lamb shift) in antihydrogen. The results appeared today in Nature. View this
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Timelapse of the ALPHA-g addition to the ALPHA Experiment
In 2018 the ALPHA Experiment was expanded with the addition of ALPHA-g. To deliver antiparticles to both ALPHA-g and ALPHA 2 (Spectroscopy trap) a beamline to transport both antiprotons and positrons was also installed. The timelapse videos below show the massive changes, from installation of the beamline, to the addition of new equipment platforms (in
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Lyman-Alpha Transition observed in Antihydrogen
The ALPHA collaboration has for the first time observed single-photon excitation of antihydrogen atoms from the ground (1S) state to the 2P state using 121nm pulsed laser light – the so-called lyman-alpha line of the Lyman series. The results were published in Nature on August 22nd 2018 and also demonstrate how the pulsed laser-light can
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First 1S-2S Line Shape published in Nature
Our latest breakthrough, the first detailed study of one of the hyperfine components of the 1S-2S line in trapped antihydrogen has been published in Nature and is the most precise and most accurate measurement of antimatter to date. This builds on years of work, developing techniques to manipulate super-cold antiprotons and positrons, create trapped antihydrogen
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ALPHA featured in the CERN Courrier
Following 30 years of effort by the low-energy antimatter community at CERN, the ALPHA collaboration has made seminal measurements of antihydrogen’s spectral structure in a bid to test nature’s fundamental symmetries. Read full article here.
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ALPHA Collaboration Meeting January 24-26, 2018
Participants in ALPHA's annual collaboration meeting at CERN.
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Observation of the 1S-2S Transition in Trapped Antihydrogen published in Nature
Our latest breakthrough, the first observation of the 1S-2S transition in trapped antihydrogen has been published in Nature and is the first time a spectral line has been observed in antihydrogen. This builds on years of work, developing techniques to manipulate super-cold antiprotons and positrons, create trapped antihydrogen and detect the very few atoms that
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The 2016 Run is over
We've shut down for 2016 – see you next year!