Speaker
Description
Muonium, a purely leptonic system of an anti-muon and an electron, is a promising candidate to probe physics beyond the standard model and bound-state QED. The Mu-MASS collaboration has a broad spectroscopy program, including a rich microwave program, and long-term aims to measure the 1S-2S transition in the muonium atom to several orders of magnitude beyond the current state of the art.
This poster on the 1S-2S experiment describes recent updates to the system, such as the incorporation of a new fiber amplifier, an active beam stabilization system, improved background suppression, and further work on increasing stability and UV power in an enhancement cavity. With these upgrades, the laser system can deliver more than 45 W of 244 nm light in the cavity. Furthermore, the poster presents extensive commissioning of the experiment, including a full campaign with hydrogen to validate the experimental scheme.