Published September 6, 2025
| Version v1
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Radiation-Hard Optical Fiber Benchmark Testing for the LUCID-3 Detector
Authors/Creators
Contributors
Supervisor (2):
-
1.
University of Bologna
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2.
European Organization for Nuclear Research
- 3. National Institute for Nuclear Physics, Bologna Division
Description
The LUCID detector is one of the key luminosity detectors in the ATLAS experiment. Currently, it relies on photomultiplier tubes placed 17 meters from the interaction point, leading to significant radiation damage over time. With the upcoming long shutdown of the Large Hadron Collider in 2026 and the transition to high-luminosity conditions, a major upgrade to the LUCID detector is planned. The upgraded system will utilize multiple sub-detectors. The sub-detector of interest to this report will use radiation-resistant optical fibers which generate and transport Cherenkov light away from the interaction region, protecting sensitive electronics. This project involved providing benchmark measurements for various optical fibers across a range of wavelengths, prior to irradiation. Eleven fibers of five types were tested, with transmission of light evaluated across ultraviolet, blue, green, and red wavelengths. The results showed clear differences in transmission efficiency among fibers. This work provides essential baseline data for comparison with post-irradiation results and supports informed fiber selection for the LUCID upgrade.
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Testing_Radiation_Hard_Optical_Fibers_Final_Report.pdf
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