Final Project Report, “Design and build of a target imaging system relevant to ESS”

Bent Lauritzen, Nicolo Borghi

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    This report is the Final Report for the project “Design and build of a target imaging system relevant to ESS”, carried out at DTU June 2016 – August 2019.
    The project is sponsored by the European Spallation Source ERIC (ESS) as a PhD project for Nicolò Borghi, and has resulted in collaboration between ESS and DTU Nutech.
    The objective has been to conduct a feasibility study for the development of a diagnostic instrument intended to monitor the ESS spallation target material over the course of its lifetime.
    The proposed Target Imaging System (TIS) consists of a 1D scintillator array detecting collimated decay γ radiation originating from the activated tungsten bricks in the target wheel. Modifications in the grid layout due to accumulation of debris or to cloven bricks will result in a localized increase of γ-ray emission. The TIS will be capable of multi-scale imaging: coarse spatial resolutions will allow fast detection of such increases, whereas the full 1 mm resolution will provide the precise 2-d location of the detected anomaly.
    Over the course of the PhD project a prototype instrument has been designed, built and commissioned at DTU to investigate the basic functionalities of the proposed TIS. Reconstructed images obtained from a specialized rotating resolution target wheel demonstrate the feasibility of the TIS principle.
    The results of the research carried out during the PhD project are discussed in detail in the PhD dissertation of Nicolò Borghi, “Developing a Target Imaging System for the European Spallation Source” (under review). This report should be considered an addendum to the PhD thesis; it summarizes main results of the work and contains supplementary material not suitable for inclusion in the thesis.
    Original languageEnglish
    PublisherDTU Nutech
    Number of pages10
    Publication statusPublished - 2019


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