Wim Pessemier

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About

Wim Pessemier is a key figure in astronomical instrumentation, specializing in the development of cryogenic and control systems for cutting-edge telescope arrays. His primary research focuses on the engineering of PLC-controlled cryostats and detector cooling systems, which are essential for the sensitive optical detectors used in transient astronomy. Pessemier’s most notable contribution is his work on the BlackGEM and MeerLICHT telescopes, where he designed and implemented the cryogenic control systems that enable these instruments to operate with the stability required for detecting optical counterparts of gravitational wave events. His 2016 paper on PLC-controlled cryostats, though with 2 citations, serves as a foundational technical reference for the BlackGEM project—an array of telescopes developed at Radboud University Nijmegen and NOVA. This work directly supports the detection of optical transients associated with gravitational waves, a frontier in multi-messenger astronomy. Pessemier’s engineering achievements have been critical to the successful deployment of the first three BlackGEM telescopes, underscoring his role in advancing the infrastructure that drives modern astrophysical discovery.