Toward a pulsed antihydrogen beam for WEP tests in AEgIS

Abstract

The AEg̅IS collaboration at CERN’s AD produces antihydrogen atoms in the form of a pulsed, isotropic source with a precisely defined formation time. AEg̅IS has recently undergone major upgrades to fully benefit from the increased number of colder antiprotons provided by the new ELENA decelerator and to move toward forming a horizontal beam to directly investigate the influence of gravity on the H̅ atoms, thereby probing the Weak Equivalence Principle for antimatter. This contribution gives an overview of these upgrades as well as subsequent results from the first beam times with ELENA.

Laser-cooled Be+ for improved antihydrogen trapping and magnetometry

“…Other experiments (ASACUSA, AEgIS and GBAR) at the Antiproton Decelerator facility are working on hydrogen beam production for the ground-state hyperfine spectroscopy [37] and gravitational free-fall experiment [38][39][40][41]. Recently ALPHA has applied the laser cooling technique to antihydrogen atoms [2], which is very promising for future improvement of precision antihydrogen measurements.…”

“…i. AEgIS: interferometry measurements, similar to that of positronium and muonium, performed in the zero magnetic field [39],…”