During the open days at CERN, I had the opportunity to visit the antimatter factory. It is composed of differents experiments: Elena, Alpha. During this visit I was able to take some pictures of magnets which interact with the beam. There is 2 things that we can do with the beam: Accelerate / Decelerate and Bent it’s trajectory. To accelerate the beam, radiofrequencies cavities are used. To change the trajectory magnets are used. On the picture on the side you can see in blue a dipole magnets which is able to bent the beam trajectory.
The CERN Axion Solar Telescope (CAST) is an experiment to search for hypothetical particles called “axions”. These have been proposed by some theoretical physicists to explain why there is a subtle difference between matter and antimatter in processes involving the weak force, but not the strong force. If axions exist, they could be found in the centre of the Sun and they could also make up invisible dark matter.
The LHC smashes groups of protons together at close to the speed of light: 40 million times per second and with seven times the energy of the most powerful accelerators built up to now. Many of these will just be glancing blows but some will be head on collisions and very energetic. When this happens some of the energy of the collision is turned into mass and previously unobserved, short-lived particles – which could give clues about how Nature behaves at a fundamental level – fly out and into the detector.
The largest volume detector ever constructed for a particle collider, ATLAS has the dimensions of a cylinder, 46m long, 25m in diameter, and sits in a cavern 100m below ground. The ATLAS detector weighs 7,000 tonnes, similar to the weight of the Eiffel Tower.
The detector itself is a many-layered instrument designed to detect some of the tiniest yet most energetic particles ever created on earth. It consists of six different detecting subsystems wrapped concentrically in layers around the collision point to record the trajectory