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| Home > Publications database > Real-time antiproton annihilation vertexing with submicrometer resolution |
| Journal Article | IMPULSE-2026-00013 |
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2025
Assoc.
Washington, DC [u.a.]
Please use a persistent id in citations: doi:10.1126/sciadv.ads1176
Abstract: Primary goal of the AEḡIS experiment is to precisely measure the free fall of antihydrogen within Earth’s gravita-tional field. To this end, cold (≈ 50 K) antihydrogen will traverse a two-grid moiré deflectometer before annihilat-ing onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertexrelative to the grids with micrometric accuracy. Here, we introduce a vertexing detector based on a modified mo-bile camera sensor and experimentally demonstrate that it can measure the position of antiproton annihilationsμm, a 35-fold improvement over the previous state of the art for real-time antiproton vertexing.within 0.62+0.40−0.22 μm. These methods are directly applicable to antihydrogen. Moreover, the sensitivity to light of the sensor enablesin situ calibration of the moiré deflectometer, substantially reducing systematic errors. This sensor emerges as abreakthrough technology toward the AEḡIS scientific goals and will constitute the basis for the development of alarge-area detector for conducting antihydrogen gravity measurements.
Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)
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