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DTSTART;TZID=Europe/Berlin:20260520T160000
DTEND;TZID=Europe/Berlin:20260520T170000
DTSTAMP:20260614T232306
CREATED:20260420T083820Z
LAST-MODIFIED:20260611T123020Z
UID:10000347-1779292800-1779296400@laserlab-europe.eu
SUMMARY:Laserlab-Europe Talk: Elucidating the Photon Migration Effects in Incubated Chicken Eggs using Time-Domain Diffuse Optics
DESCRIPTION:Title: Elucidating the Photon Migration Effects in Incubated Chicken Eggs using Time-Domain Diffuse Optics Speaker: Lennard van den Tweel (Wageningen University and Research) Date: Wednesday\, 20 May 2026\, 16:00 Central European Summer Time (CEST) \nThe early and non-invasive assessment of chicken embryonic sex and viability is of great interest. This interest is driven by the ethical dilemma surrounding the culling of non-productive day-old male chicks in layer-hen production and by the need to improve hatchery efficiency. Optical techniques are widely investigated for these applications\, but are challenged by the complex optical properties and heterogeneous structure of avian eggs. Here\, we show that chicken eggs display unusual photon trapping behavior due to the eggshell behaving like an integrating sphere\, considerably extending photon time-of-flight. Time-domain diffuse optical spectroscopy (TD-DOS) on egg phantoms\, supported by Monte Carlo simulations and post-dispersive filtering experiments\, rule out fluorescence as the source for the long photon time-of-flight. These results point to diffuse reflections at the inner surface of the eggshell as the source of the long photon time-of-flight. Despite these boundary effects\, the retrieval of internal bulk optical properties remains feasible via inversion of the diffusion approximation after selection of appropriate boundary conditions\, as was demonstrated in incubated eggs. Finally\, phantom experiments illustrate how the integrating sphere affects the temporal response of time-resolved Raman and fluorescence measurements\, highlighting critical challenges in non-invasive optical characterization of avian embryos.
URL:https://laserlab-europe.eu/event/lle-talk-elucidating-the-photon-migration-effects-in-incubated-chicken-eggs-using-time-domain-diffuse-optics/
LOCATION:Online
CATEGORIES:conference calendar,laserlab-europe events,laserlab-europe talk,lasers4eu
ATTACH;FMTTYPE=image/png:https://laserlab-europe.eu/wp-content/uploads/20260520_lle-talk_tweel.png
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DTSTART;TZID=Europe/Berlin:20260610T160000
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DTSTAMP:20260614T232306
CREATED:20260512T071601Z
LAST-MODIFIED:20260611T122906Z
UID:10000353-1781107200-1781110800@laserlab-europe.eu
SUMMARY:Laserlab-Europe Talk: Medical Radionuclide Production by Laser Wakefield Acceleration
DESCRIPTION:Title: Medical Radionuclide Production by Laser Wakefield AccelerationSpeaker: Dino Jaroszynski (University of Strathclyde)Date: Wednesday\, 10 June 2026\, 16:00 Central European Summer Time (CEST) \nWe present a study of the production of 67Cu medical radioisotopes using bremsstrahlung radiation produced by 150 pC bunches of high energy electrons from a laser wakefield accelerator (LWFA) when they interact with dense convertor material.  The experiments demonstrating photonuclear production of radioisotopes have been carried out at the Scottish Centre for the Application of Plasma-based accelerators (SCAPA). 10 kBq of 67Cu was produced by irradiating enriched 68Zn over a five-hour irradiation period at approximately 1 Hz repetition rate\, which provides an important experimental benchmark. This work assesses the performance of current LWFA systems and establishes the requirements of future commercial LWFA-based systems and extrapolations suggests that the next stage of development. A facility based on optically pumped CO2 laser technologies could potentially achieve clinically relevant activity levels of 67Cu. The project is part of the MedRadLaser collaboration between the University of Strathclyde\, National Physical Laboratory\, the University of the West of Scotland\, and the UK Atomic Energy Authority. The studies will be extended and form part of the newly funded EUROPA project. \nThe MedRadLaser collaboration involves Giuseppe Lorusso[1]\, Dino A. Jaroszynski[2]\, David O’Donnell[3]\, S. Mark Wiggins[2]\, Baris Bingol[2]\, Peter Ivanov[1]\, Ben Russel[1]\, and Lanre Yusuf[1]  \n[1] NPL Science and Engineering Directorate\, UK[2] Department of Physics\, Scottish Universities Physics Alliance\, University of Strathclyde\, Glasgow\, UK[3] School of Computing\, Engineering and Physical Sciences\, Scottish Universities Physics Alliance\, University of the West of Scotland\, Paisley\, UK \n			\n				Watch the LLE Talk
URL:https://laserlab-europe.eu/event/lle-talk-medical-radionuclide-production-by-laser-wakefield-acceleration/
LOCATION:Online
CATEGORIES:conference calendar,europa,expert group lasers for health,laserlab-europe events,laserlab-europe talk,projects
ATTACH;FMTTYPE=image/png:https://laserlab-europe.eu/wp-content/uploads/Thumbnail_dino.png
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