ental limits on the ratio of the graviational and inertial masses of antihydrogen (the ratio is very close to one for hydrogen). We observed the times and positions at which 434 trapped antihydrogen atoms escaped our magnetic trap, and searched for the influence of a gravitational force. Based on our data, we can exclude the possibility that the gravitiational mass of antihydrogen is more than 110 times its inertial mass, or that it falls upwards with a gravitational mass more than 65 times its inertial mass.
Our results far from settle the question of antimatter gravity. But they open the way towards higher-precision measurements in the future, using the same technique, but more, and colder trapped antihydrogen atoms, and a better understanding of the systematic effects in our apparatus.”
“The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen with 1% accuracy and test the Weak Equivalence Principle which lies at the base of General Relativity. Most of the equipment has been installed with the exception of the gravity module which is still the subject of research and development. We have performed a test experiment with a miniature copy of the gravity module. The results have shown that a micrometric shift is observable, and thus establish the feasibility of the proposed detection method. Obviously, the short term plan is to produce antihydrogen atoms. This requires improvements in antiproton cooling system, in the positron system and the optimization of positronium production. The goal is to produce an antihydrogen beam in 2015–2016 and to perform a ﬁrst rough measurement of the gravitational acceleration shortly thereafter.”