Possibilities for antihydrogen formation by antiproton-positronium collisions

Progress made towards the production of antihydrogen by antiproton-positronium collisions is surveyed. This includes an outline of how antiprotons ejected in short bursts from the low energy antiproton ring (LEAR) at CERN are captured, cooled, and stored in a Penning trap. Details are given of how a source of low-energy positrons can be interfaced to this trap to promote antihydrogen formation. Production rates and a possible scenario are outlined. We conclude with some comments on what might happen after the closure of LEAR, currently scheduled to take place at the end of 1996.