TU Dresden Data Publications

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Data publications from research of Dresden University of Technology.

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  • Item
    Open Access
    PGT Prompt Gamma Timing PETsys data for publication at IKTP (PGT)
    (Technische Universität Dresden, 2024-05-14) Novgorodova, Olga; Straessner, Arno; Hentges, Rainer; Glatte, Andreas; Lutz, Benjamin; Roemer, Katja; Teichmann, Thobias; Koegler, Toni
    Proton therapy requires range verification in order to exploit its full potential. One of the most promising approaches is to monitor prompt gamma-rays produced by nuclear interactions of the therapeutic particles in the patient tissues. In our paper, we test PETsys electronics with a detector with a wide energy range from 100 keV to 15 MeV. We tested what time resolution we could achieve as a high time resolution is required to achieve millimetric precision in the proton range. PETsys should survive high count rates and the fraction of pile-up events should be low or separatable. We are investigating a full acceptance approach with increased granularity in order to reduce the size of the scintillators and consequently the count rate per channel. Ideally, we want to stack the scintillators in matrices that require suitable multi-channel photo-multipliers and a fitting acquisition system. Here, we present two geometries of CeBr3 crystals 5 × 5 × 20 mm3 and 10 × 10 × 30 mm3, together with modern silicon photo-multipliers (SiPM) adapted to work with the PETsys TOFPET2 ASIC. The TOFPET2 ASIC was developed for Time-of-Flight Positron Emission Tomography (TOF-PET) applications. Here are our data measured for the publication for time resolution and coincidence time resolution, energy resolution with AmBe source, and dead time studies.
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    Open Access
    Extended Phase-Field Method (XPFM) - Data corresponding to publication: "An enriched phase-field method for the efficient simulation of fracture processes" by Loehnert et al. (2023)
    (Technische Universität Dresden, 2024-04-22) Curosu, Verena
    This dataset contains the numerical values corresponding to the graphs within the scientific (open-access) contribution "An enriched phase-field method for the efficient simulation of fracture processes" by Loehnert et al. (2023) (https://doi.org/10.1007/s00466-023-02285-z). Abstract of Paper: The efficient simulation of complex fracture processes is still a challenging task. In this contribution, an enriched phase-field method for the simulation of 2D fracture processes is presented. It has the potential to drastically reduce computational cost compared to the classical phase-field method (PFM). The method is based on the combination of a phase-field approach with an ansatz transformation for the simulation of fracture processes and an enrichment technique for the displacement field as it is used in the extended finite element method (XFEM) or generalised finite element method (GFEM). This combination allows for the application of significantly coarser meshes than it is possible in PFM while still obtaining accurate solutions. In contrast to classical XFEM / GFEM, the presented method does not require level set techniques or explicit representations of crack geometries, considerably simplifying the simulation of crack initiation, propagation, and coalescence. The efficiency and accuracy of this new method is shown in 2D simulations.
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    Open Access
    STABEEL - Messkampagne 2023/Q1 - Experimentelle Verifikation von Umrichterinteraktionen Q(U)-geregelter Erzeugungsanlagen am Dynamischen Netzmodell (physikalische 220-kV-Netznachbildung) des TUD - IEEH
    (Technische Universität Dresden, 2024-03-19) Krahmer, Sebastian; Ecklebe, Stefan
    Dieses Datenset enthält die erstellten Netz- und Anlagenmodelle, die Beschreibung der durchgeführten Experimente sowie die aufgezeichneten Strom- und Spannungsverläufe (Messdaten) zur Verifikation und Weiterentwicklung der im STABELL-Projekt aufgestellten Stabilitätskriterien. Die Versuche wurden am Dynamischen Netzmodell des Instituts für Elektroenergieversorgung und Hochspannungstechnik durchgeführt. Dieses Labornetz bildet ein 220-kV-Netz in einem Modellmaßstab von 440 V ab. In dem Versuch wurden die Interaktionen von Q(U)-geregelten Erzeugeranlagen untersucht, in dem diese mit Hilfe der freiparametrierbaren Regelungsplattform (https://tu-dresden.de/ing/elektrotechnik/eti/le/die-professur/Einrichtungen) des Lehrstuhls für Leistungselektronik nachgebildet wurden. Die Arbeiten entstanden im Rahmen des Projektes STABEEL, gefördert durch die Deutsche Forschungsgemeinschaft (DFG, doi: 10.13039/501100001659) – Projektnummer 442893506.
  • Item
    Open Access
    Strain curves measured with different DFOS types and varying spatial resolution by an ODiSI 6108
    (Technische Universität Dresden, 2024-03-15) Herbers, Max
    Based on the principle of coherent optical frequency domain reflectometery (c-OFDR), cracks in concrete structures can be precisely localized and their widths determined due to the high spatial resolution in the sub-millimeter range. However, with longer distributed fiber optic sensors (DFOS) lengths, as is common in structural health monitoring, the spatial resolution is reduced. Experimental studies were carried out to investigate the influence of the spatial resolution on the measurement quality in the area of large strain gradients. Four different DFOS, two robust and two filigree DFOS types, were subsequently installed on a 4 m long reinforced concrete beam. In a displacement controlled 4-point bending test, crack widths of up to 0.5 mm were measured with four different gage pitch (gp).