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Related Experiment Video

Updated: May 16, 2025

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

Real-time antiproton annihilation vertexing with submicrometer resolution.

Michael Berghold¹, Davide Orsucci², Francesco Guatieri^1,3,4

¹Research Neutron Source Heinz Maier-Leibnitz (FRM II), Technical University of Munich, Lichtenbergstr. 1 Garching bei München, 85748 Bayern Germany.

Science Advances

|April 2, 2025

Summary

The AEḡIS experiment aims to measure antihydrogen free fall using a novel vertexing detector. This new technology achieves unprecedented accuracy in pinpointing annihilation events, advancing antihydrogen gravity research.

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Area of Science:

Antimatter physics
Gravitational measurements
Particle detection

Background:

The AEḡIS experiment seeks to precisely measure the free fall of antihydrogen in Earth's gravitational field.
Accurate vertexing of antiproton annihilations is crucial for determining antihydrogen's trajectory.

Purpose of the Study:

Introduce and validate a novel vertexing detector for antiproton annihilations.
Demonstrate the detector's capability for high-precision position measurement.
Assess the sensor's suitability for antihydrogen gravity measurements.

Main Methods:

Utilized a modified mobile camera sensor as a vertexing detector.
Experimentally measured the position of antiproton annihilation events.
Evaluated the sensor's sensitivity to light for in situ calibration.

Main Results:

Achieved position measurement accuracy of [Formula: see text] μm for antiproton annihilations.
Demonstrated a 35-fold improvement in real-time antiproton vertexing accuracy.
Confirmed the sensor's light sensitivity enables in situ moiré deflectometer calibration.

Conclusions:

The developed vertexing detector is a breakthrough technology for the AEḡIS experiment.
The sensor significantly reduces systematic errors in antihydrogen gravity measurements.
This technology will form the basis for large-area detectors for future antihydrogen studies.