Fig. 2
From: Antihydrogen accumulation for fundamental symmetry tests
Antihydrogen synthesis sequence. Dashed and solid curves represent electrostatic potentials before and after each step in the process. Filled regions indicate self-potentials and physical extents of antiproton and positron plasmas. a Potential before evaporative cooling. Positron well depth 3.31 V. b Evaporative cooling, during which energetic positrons escape to the right (duration 600 ms). Final positron well depth 0.91 V. c Potential realignment in preparation for mixing (duration 10 ms). Final positron well depth 0.91 V. d Potential merge mixing (duration 1 s). Positrons escape to the left during mixing, resulting in further evaporative cooling. Final positron well depth 0.27 V. Remaining positrons are ejected to the right for a temperature measurement; remaining antiprotons are ejected to the left
