ALPHA experiment

[1] Scientists taking part in ALPHA include former members of the ATHENA experiment (AD-1), the first to produce cold antihydrogen in 2002.

On 27 September 2023, ALPHA collaborators published findings suggesting that antimatter interacts with gravity in a way similar to regular matter, supporting a prediction of the weak equivalence principle.

To confirm successful trapping, the ALPHA magnet that creates the minimum B-field was designed to allow rapid and repeated de-energizing.

In theory, the fast turn-off speed and the ability to suppress false cosmic rays signals allows ALPHA to detect the release of single antihydrogen atoms during de-energization.

[6][7][8] On 27 September 2023, the ALPHA team published a paper supporting the prediction that the gravitational interaction of antimatter is similar to that of regular matter.

For the weak equivalence principle of general relativity to be correct, it is required that the two substances display identical gravitational properties.