Speaker
Description
The LEMING experiment aims to measure the free fall of muonium (Mu) atoms to learn about the gravitational interaction of second generation leptonic antimatter. This measurement can only be carried out by a precise atomic beam interferometer. A novel Mu source based on superfluid helium allows us to produce a horizontal beam of the required quality. We are developing a prototype to demonstrate muonium interferometry for the first time. It works in the near field (Talbot) regime, and is optimized for Mu transmission and contrast. The device must operate in the cryogenic environment (T<200 mK) of the experiment. This poster presents the most recent developments in construction and test-bench validation of the interferometer, and the calibration concept based on soft X-rays.