Multiple Aperture-Based Antihydrogen Parallel Plate Gravity Experiment

An experiment is described that could be carried out at the CERN Antiproton Decelerator facility to determine the direction of acceleration of antihydrogen in the earth's gravitational field. The experiment would use two plates separated by a small distance and oriented parallel with the earth's surface. Multiple cylindrical barriers would be used with gaps that allow the antihydrogen to pass through. Shadow regions are created where, with linear motion, the antihydrogen cannot annihilate. However, with parabolic paths, such as those of objects under the influence of gravity, antihydrogen can annihilate within a shadow region. The probability of an atom annihilating in one of the shadow regions is determined. For simplicity the model considers the antihydrogen source as a point and at a temperature of 4 K.