Production of Cold Antihydrogen - the ATHENA Experiment
Jeffrey Hangst (Université d’Aarhus, Danemark)

Jeudi 23 octobre 2003

Antihydrogen is the antimatter equivalent of the hydrogen atom. It is of fundamental interest for, among other things, tests of CPT symmetry and measurements of gravitational effects on antimatter.

In 2002 the ATHENA experiment produced the first cold antihydrogen atoms by mixing trapped plasmas of positrons and antiprotons. The annihilation of the neutral anti-atoms is detected when they escape the apparatus.

In this colloquium I will describe the ATHENA experiment and the developments that resulted in this success. I will also discuss subsequent experiments aimed at understanding the physics of antihydrogen production. Finally, the future of anti-atomic physics will be addressed.