4 research outputs found
Prospects for forward emitted positronium from nanoporous membranes at AEgIS
No full textAntihydrogen formation at AEgIS at CERN leverages charge exchange between Rydberg positronium (Ps*) and antiprotons, with cross-sections scaling with the Ps principal quantum number n4 and inversely with relative velocity v−2. However, the motional Stark effect and velocity mismatch between Ps and antiprotons impose stringent constraints, limiting efficiency. Advances in transmission positronium converters mitigate self-ionization losses and improve velocity alignment, promising a significant boost in antihydrogen yield. This work evaluates formation cross-sections, Ps velocity profiles, and the integration of advanced transmission Ps converters for precision gravitational studies
3D simulation studies of mixed plasma confinement at AEgIS(Equation presented)
No full textThe AE(Equation presented)IS (Antimatter Experiment: Gravity, Interferometry and Spectroscopy) project, based at CERN's Antiproton Decelerator (AD) facility seeks to probe the Weak Equivalence Principle (WEP) for antimatter. It has undergone significant enhancements, capitalizing on the increased quantity of colder antiprotons made available by the Extra Low Energy Antiproton Ring (ELENA) decelerator. These improvements aim to create a horizontal pulsed beam of antihydrogen atoms and enable a direct investigation into the impact of gravity. The AE(Equation presented)IS experiment consists of a Penning Malmberg trap comprising cylindrical electrodes within a 5 T and a 1 T axial magnetic field region. The 5 T field captures cold antiprotons, while the 1 T field is used for further trapping which ultimately leads to antihydrogen production. To maximize the antihydrogen formation, it is crucial to have a detailed understanding of the properties of trapped antiprotons, which can be achieved by realistic 3D simulation studies for the dynamics of particle confinement. Previous studies indicated antiprotons exhibit greater stability in a shallower potential well [1]. In this work, we examine the dynamics of antiprotons by varying the outer electrode potentials while maintaining constant potentials at the inner electrodes of the electrostatic trap, utilizing an Electrostatic Particle-In-Cell (ES-PIC) solver in the CST (Computer Simulation Technology) studio. We extended the studies on the temporal evolution of a mixed plasma generated with the introduction of electrons inside the trap along with the antiprotons by observing the effect of their properties: density, and temperature. Additionally, we provide an overview of the results obtained for the energy evolution of antiprotons using a Rotating Wall (RW) electrode at different RW frequencies. Finally, we summarize our plans to develop a full digital twin of the AE(Equation presented)IS experiment for the next two years, providing valuable insights into the parameters required for optimized experiments
The AEgIS Experiment: Progress and Future Outlook
No full textThe AEgIS experiment at CERN is pioneering measurements of gravity, spectroscopy, and interferometry using pulsed antimatter atomic sources. This work provides an overview of the AEgIS experimental setup and highlights recent advancements in antihydrogen production, positronium laser cooling, and the creation of antiprotonic atoms. Key technological developments, including the overhaul of the control system and its impact on precision experiments, are reviewed. Future perspectives for AEgIS before CERN Long Shutdown 3 and beyond are summarized
Positronium Doppler laser cooling : results and perspectives
No full textThe experimental demonstration of positronium laser cooling with stationary broadband laser pulses with negative detuning is briefly described. Considerations on the limits of the current experiment and possible future developments follow. In particular, the benefit of positron remoderation, use of a magnetic field, positronium polarization, pulse shaping, coherent laser cooling and deceleration are shortly discussed
