With the exception of modes, presently we can only detect antimatter in our apparatus by destructive methods (we either need to splat our particles onto a detector surface or annihilate the antimatter into the trap wall). While working with antimatter makes almost everything very difficult, fortunately detection is often very efficient.
We either detect the charge of particles in our apparatus (Faraday Cup, MCP, temperature measurements), or the annihilation products. When antimatter comes in contact with matter, it annihilates. This annihilation releases lots of energy and subatomic particles. These products are then detected either with the Plastic Scintillators, TPC, SVD.
On February 19, 2020, ALPHA published the first investigation of the fine structure of Antihydrogen.
In 2018 the ALPHA Experiment was expanded with the addition of ALPHA-g. Look at timelapse videos to see the massive changes, from installation to beamline!
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.