Speaker
Description
The LEMING experiment aims to measure the free fall of muonium (M $= \mu^+ + e^-$) and thereby testing for the first time the weak equivalence principle using a purely leptonic, second-generation antimatter dominated system. Such a direct measurement requires a high-intensity, low-emittance M beam. We have demonstrated the working principle of this novel M beam by stopping accelerator muons in a thin layer of superfluid helium and by the subsequent observation of M emission from the helium target. The experimental setup including cryogenic scintillation detectors operating at $<$ 0.2 K temperatures will be described. Further, an initial characterization of the novel M source will be presented, showing the non-thermal behaviour of the M beam required for the LEMING experiment.
