Appendix 2
AEgIS plans to use the antiprotons from the antiproton decelerator which is fed by antiproton produced in a collision between a metal target and protons from proton synchrotron (below). These protons are then cooled via electron cooling 20 , in this process very slow moving electrons bombard the sample, taking energy from it and confining it in a small space. This is useful because it prevents contact with the walls of the experiment, preventing annihilation. Next they introduce positrons from a radioactive source to these antiprotons to form antihydrogen. This neutral antihydrogen is then accelerated by an electric field through a device which only allows particles on certain trajectories to pass through it to a photographic film which detects the annihilation of the antihydrogen, allowing the path of the antihydrogen to be calculated.
The LHC https://bigscience.web.cern.ch/bigscience/en/lhc/lhc2.html
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20 G.I. Budker, ‘An Effective Method of Damping Particle Oscillations in Proton and Antiproton Storage Rings’ 29/08/14
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