Accumulating anti-atoms

Antiprotons entering the ATHENA experiment from the AD (left, not shown) are stored in a superconducting magnet, where they are joined by positrons from the positron accumulator (right). Image: CERN.

Antiprotons entering the ATHENA experiment from the AD (left, not shown) are stored in a superconducting magnet, where they are joined by positrons from the positron accumulator (right). Image: CERN.