Dresden 2026 – scientific programme
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FM: Fachverband Funktionsmaterialien
FM 19: Advanced Microscopy and Tomography for Functional Materials
FM 19.3: Talk
Thursday, March 12, 2026, 10:45–11:00, BEY/0E40
Developing a resuable optical fiber-based sensing system for in-situ X-ray radiaiton monitoring — Ali Karatutlu1,2, Esra Kendir Tekgül2, Zehra Gizem Mutlay1, Andriy Budnyk1, Gianluca Iori3,4, Philipp Hans5, Fareeha Hameed5, and •Bülend Ortaç1 — 1Bilkent University, Institute of Materials Science Nanotechnology and National Nanotechnology Research Center (UNAM), Ankara, 06800 Turkey — 2Sivas University of Science and Technology, Department of Engineering Basic Sciences, Sivas, 58100 Turkey — 3Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland — 4GratXray, Villigen, Switzerland — 5Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME), Allan, 19252, Jordan
Specialty optical fibers doped with rare-earths such as Yb, and Tm are utilized for various applications from medical to high-power beam delivery for materials processing. Nevertheless, radiation-induced defects can occur due to irradiation, causing a degradation of beam quality. In this study, we utilize this type of degradation, referred to as radiation-induced attenuation, as an X-ray sensing and the conditions in the in-situ recovery of color centers. The experiments were conducted at hard X-ray beamline at BEATS, SESAME, using different monochromatic beams such as 10 keV and 20 keV, suggesting the origin of color centers playing role in the RIA and the sensing and recovery behavior that are related to the optical and morphological effects of the X-ray irradiation.
Keywords: X-ray computed tomography; specialty optical fibers; photodarkening; recovery; in-situ sensing