Date/Time: Thu Jun 05 2025 at 14:00<br/><br/>Location: Auditorium<br/><br/>Speaker: Adam Powell (CERN)<br/><br/>Title: [Quantum Forum Seminar] Observation of the Effect of Gravity on Antimatter and the Future of the ALPHA-g Experiment<br/><br/>Abstract: https://ubc.zoom.us/j/68226245065?pwd=HWgfHU9EBTkdWjaYUadaNoGhoi3XD8.1
Meeting ID: 682 2624 5065
Passcode: 344808
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The antihydrogen laser physics apparatus (ALPHA) collaboration has studied trapped antihydrogen atoms through spectroscopy for several years. In 2023 the collaboration published the first results from a new apparatus, ALPHA-g [1]. By the slow release of magnetically confined antihydrogen, we determine the local gravitational acceleration of antihydrogen is directed towards the Earth and has magnitude, a_gbar =0.75 +/- 0.13 (statistical+systematic) +/- 0.16 (simulation)g, where g = 9.81 ms^(-2).
I will show the experimental details of this first observation of the effect of gravity on antimatter and the systematic studies involved. I will summaries the imminent plans with the ALPHA-g experiment and finally discuss longer term measurements possible using the apparatus.
[1] Observation of the effect of gravity on the motion of antimatter, E. K. Anderson, C. J. Baker, W. Bertsche, et al, Nature volume 621, pages716?722 (2023).
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Adam Powell is a recent recipient of 2025 CAP DNP Thesis Prize, and currently a CERN Fellow and ALPHA's Technical Coordinator.
<br/><br/>https://ubc.zoom.us/j/68226245065?pwd=HWgfHU9EBTkdWjaYUadaNoGhoi3XD8.1
Meeting ID: 682 2624 5065
Passcode: 344808
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