Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 36: Highly Charged Ions and their Applications II
A 36.4: Talk
Friday, March 15, 2024, 12:00–12:15, HS 1010
Positron source in the LSym experiment — •Maria Pasinetti, Fabian Raab, Lukas Holtmann, Daniel Rubin, Andreas Thoma, Sangeetha Sasidharan, and Sven Sturm — Max-Planck-Institut für Kernphysik
The goal of LSym is to conduct a stringent CPT test by comparing the properties of matter and antimatter with unprecedented sensitivity by simultaneously comparing the spin precession frequencies of a single positron and an electron in a millikelvin-cooled Penning trap. One of the challenges in this project is to trap one or a few positrons from a rather weak (about 1MBq) radioactive 22Na source. Furthermore, an efficient detection method for the positrons needs to be designed and implemented. As the positrons follow a β+ decay spectrum, they have to be moderated before entering the trap, a process with low efficiency requiring careful execution. The trapped positron is then cooled to the ground-state of motion in the center of the trap. This presentation illustrates the principles and techniques that will be used for the positron source at LSym.
Keywords: CPT; Antimatter; Penning trap; QED; Positron