Category: Engineering
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Eraldo Zaccheroni (1926 – 2026)
Eraldo Zaccheroni (1926 – 2026) — Eraldo Zaccheroni, an influential engineer who worked at CERN during the Organization’s earliest years, sadly passed away in Faenza, Italy, on 10 August at the age of 100. Born on 21 May 1926 in Meldola, in the Emilia-Romagna region of Italy, Eraldo earned his degree in electrical engineering from
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Efficiency meets environmental responsibility: commissioning CERN’s primary CO₂ cooling circuit
The ATLAS and CMS detectors require ultra-low, stable temperatures to protect their sensitive electronics. Traditional cooling systems rely on synthetic refrigerants like hydrofluorocarbons (HFCs), which, while effective, have a global warming potential thousands of times greater than CO₂. Seeking a sustainable alternative, CERN has turned to CO₂ itself – a natural refrigerant with a far
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CERN begins beryllium beam-pipe production
Supported by CERN and the LHC experiment collaborations, the workshop will construct essential components for HiLumi LHC and future particle physics experiments
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CERN levels up with new superconducting karts
The race is on to test new vehicles in the underground Large Hadron Collider tunnel, ahead of major works starting this summer
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European labs get aligned at CERN
Eleven laboratories have all come to CERN to measure a girder, using their state-of-the-art equipment to establish a common definition of alignment uncertainty
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Roger Perret (1951 – 2025)
Roger Perret(1951 – 2025) — We are deeply saddened to announce the passing of Roger Perret on 20 December 2025. A mechanical design engineer of exceptional expertise and professionalism, Roger joined CERN in 1975, where he served with distinction until his retirement in 2010. Over his 35-year career, within what later became the EN-MME Design
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Nicolaas Kos (1965 – 2025)
Nicolaas Kos(1965 – 2025) — Nicolaas “Nico” Kos began his career at CERN in 1994 with technical responsibilities for vacuum-component contracts for LEP2, liaising with European industry to ensure the highest standards. A year later, he joined the LHC project, quickly becoming a key member in the development of beam screens, overseeing prototypes, contract negotiations
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Lift off: CERN engineer travels to space
CERN engineer Sławosz Uznański-Wiśniewski, now an ESA astronaut, has just taken off for the International Space Station aboard a SpaceX Dragon spacecraft launched from NASA’s Kennedy Space Center
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Joseph Tagg (1982 – 2025)
Joseph Tagg(1982 – 2025) — It is with deep sorrow that we announce the passing of Joseph Tagg, an esteemed engineer, colleague and friend, who died on 10 June 2025 at the age of 43. Joseph was a cornerstone of the Measurement Test and Analysis (MTA) section in the Beams (BE) Controls, Electronics and Mechatronics
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Stefano Mazzoni (1978–2025)
Stefano Mazzoni(1978–2025) — We are deeply saddened to learn of the death of Stefano Mazzoni. Stefano left an indelible mark at CERN, where he worked within the Beam Instrumentation group. From his arrival on 1 September 2012, as a physicist specialising in optics and lasers, Stefano quickly distinguished himself through his exceptional expertise and dedication.