Simulating detector eNvironment
The Aegis project at CERN aims to measure gravitational acceleration “g” for antihydrogen while also studying Rydberg atoms, positronium formation, and antihydrogen spectroscopy. Utilizing the Antiproton Decelerator, we slow antiprotons to low energies for various experiments. Our ongoing simulations with Geant4 focus on optimizing experimental parameters like air gap thickness and degrader design to maximize antiproton retention and minimize annihilation with detector walls. We seek to explore metastable antiprotonic atoms, building on existing knowledge to advance our understanding of fundamental physics.
Simulating detector eNvironment
E N D
Presentation Transcript
Simulating detector eNvironment Conrad Roman :: Logan Kageorge
Aegis’s main goals • Measurement of gravitational acceleration “g” for anti-hydrogen. • Other goals aside from main one: • Study of Rydberg atoms. • Positronium formation, excitation, and spectroscopy. • Spectroscopy of anti-hydrogen.
Antiproton decelerator The Antiproton Decelerator is an antiproton storage ring that supplies low energy antiprotons to various experiments at CERN (ATRAP, ASACUSA, ACE, ALPHA, and AEgIS). AD slows down antiprotons from near light speed to around 0.1c before sending them out for use.
WHAT ARE WEDOING? (Our project goes here)
Goals • Using Geant4 to simulate the design of this side project. Various things need to be considered: • How thick should the air gap between the beam and the detector entrance be? • The degrader slows down (hopefully to ~100 kev) the antiprotons upon entering the experimental environment. What should be the gradient of thickness available for the degrader?
Goals • We want the anti-protons to make it to the back of the barrel (~1 m). • The main problem is that once antiprotons exit the degrader, they will be scattering at large angles, therefore annihilating with inner walls before they even reach the end of the barrel. simulate a collimator, varying the radius to ensure that as many antiprotons as possible reach the back of the barrel, but do not annihilate on the walls (creating excess noise).
Goals • So what is all of this for? • creating metastable (~10 μs) anti-protonic atoms. • Part of the project is to scour the little literature available for different possible metastable antiprotonic atoms. • Currently, only antiprotonic helium is stable enough to study.
