The charged particle trap, capable of holding electrons, positrons and antiprotons in a vacuum.
An illustration of a typical Penning Malmberg trap. Voltages are applied to the two outer electrodes, forming a potential well. (Figure from Charlton et. al, “Antihydrogen for precision tests in Physics” 2008.)
A photo of the edge of the electrode stack
An illustration of a typical Penning Malmberg trap. Voltages are applied to the two outer electrodes, forming a potential well. (Figure from Charlton et. al, “Antihydrogen for precision tests in Physics” 2008.)