- Titel
- Entwicklung von SiPM-basierter Auslese für Detektoren an R³B/FAIR und Untersuchung astrophysikalisch relevanter Kernreaktionen an R³B
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:d120-qucosa2-976687
- Schriftenreihe
- Wissenschaftlich-technische Berichte / Helmholtz-Zentrum Dresden - Rossendorf / HZDR
- Bandnummer
- HZDR-138
- Abstract (EN)
- The NeuLAND (New Large-Area Neutron Detector) plastic-scintillator-based time-of-flight detector for 0.1 to 1.6 GeV neutrons is currently under construction at the Facility for Antiproton and Ion Research (FAIR), Darmstadt, Germany. In its nal conguration, NeuLAND will consist of 3,000 plastic scintillator bars with a size of 2.7 m ×5 cm ×5 cm that are read out on each end by fast timing photomultipliers. Here, data from a comprehensive study of an alternative light readout scheme using silicon photomultipliers (SiPM) are reported. For this purpose, a NeuLAND bar was instrumented on each end with a SiPM-based prototype of the same geometry as a 1 photomultiplier tube, including four 6×6 mm2 SiPMs, ampliers, high voltage supply, and microcontroller. Tests were done using the 35 MeV electron beam of the superconducting Electron Linac for beams with high Brilliance and low Emittance (ELBE) with its picosecond-level time jitter in two dierent modes of operation, namely parasitic mode with one electron per bunch and single-user mode with 1 to 60 electrons per bunch. Acqiris fast digitizers were used for data acquisition. In addition, o-beam tests using cosmic rays and the NeuLAND data acquisition scheme have been carried out. Typical time resolutions of sigma≤120 ps were found for ≥95% eciency for minimum ionizing particles, improving on previous work at ELBE and exceeding the NeuLAND timing goal of sigma < 150 ps. Over a range of 10 to 300 MeV deposited energy in the NeuLAND bar, the gain was found to deviate by ≤10% (≤20%) from linearity for 35 µm (75 µm) SiPM pitch, respectively, satisfactory for calorimetric use of the full NeuLAND detector. The dark rate of the prototype studied was found to be lower than the expected cosmic-ray induced background in NeuLAND. In addition, simulations in Geant4 were developed to understand electron scattering and the propagation of scintillation light as well as the time behavior of SiPMs. Additionally, collaboration and data evaluation of experiments on astrophysically interesting reactions in the form of the coulomb breakup reaction 16O(gamma, alpha)12C at R³B/GSI were part of this work and methods for data quality analysis of large scale detectors were developed.
- URN Qucosa
- urn:nbn:de:bsz:d120-qucosa2-976687
- Veröffentlichungsdatum Qucosa
- 13.08.2025
- Dokumenttyp
- Bericht
- Sprache des Dokumentes
- Deutsch
- Lizenz / Rechtehinweis
CC BY 4.0