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Personalities and History CERN-ARCH-PHOTO-GE-002

Photographs and transparencies from Walter Oelert of the first antihydrogen experiment in LEAR, 1995

Walter Oelert (1942–2024) was a German physicist and professor at the Jülich Research Centre (Forschungszentrum Jülich), from which he led many of his research activities. In 1995, an international team at CERN, led by Professor Walter Oelert, achieved the world’s first creation of antihydrogen atoms in the PS210 experiment at the Low Energy Antiproton Ring (LEAR). The PS210 collaboration produced nine antihydrogen atoms in total, generated through collisions between antiprotons and xenon atoms. This achievement directly influenced CERN’s strategic decisions: it helped motivate the construction of the Antiproton Decelerator (AD), inaugurated in 2000, which would enable future production of “cold,” slow antihydrogen suitable for detailed measurements, ultimately giving rise to experiments such as ATHENA, ATRAP, ALPHA, ASACUSA, AEgIS, and BASE.


Photograph: Unknown
Access: Photograph and transparencies, both physical and digital

Original ref.: Found in Walter Oelert’s office, transferred to the Archives by Gunn Khatri on 11 December 2025

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 Record created 2026-05-28, last modified 2026-05-29


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