Large-scale boron-lined neutron detection systems as a 3He alternative for cosmic ray neutron sensing
Cosmic-Ray neutron sensors are widely used to determine soil moisture on the hectare scale. Precise measurements, especially in the case of mobile application, demand for neutron detectors with high counting rates and high signal-to-noise ratios. For a long time Cosmic Ray Neutron Sensing (CRNS) ins...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 September 2020
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| In: |
Frontiers in water
Year: 2020, Jahrgang: 2 |
| ISSN: | 2624-9375 |
| DOI: | 10.3389/frwa.2020.00016 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.3389/frwa.2020.00016 Verlag, kostenfrei, Volltext: https://www.frontiersin.org/articles/10.3389/frwa.2020.00016/full 
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| Verfasserangaben: | Jannis Weimar, Markus Köhli, Christian Budach and Ulrich Schmidt |
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| 520 | |a Cosmic-Ray neutron sensors are widely used to determine soil moisture on the hectare scale. Precise measurements, especially in the case of mobile application, demand for neutron detectors with high counting rates and high signal-to-noise ratios. For a long time Cosmic Ray Neutron Sensing (CRNS) instruments have relied on $^3$He as an efficient neutron converter. Its ongoing scarcity demands for technological solutions using alternative converters, which are $^6$Li and $^{10}$B. Recent developments lead to a modular neutron detector consisting of several $^{10}$B-lined proportional counter tubes, which feature high counting rates via its large surface area. The modularity allows for individual shieldings of different segments within the detector featuring the capability of gaining spectral information about the detected neutrons. This opens the possibility for active signal correction, especially useful when applied to mobile measurements, where the influence of constantly changing near-field to the overall signal should be corrected. Furthermore, the signal-to-noise ratio could be increased by combining pulse height and pulse length spectra to discriminate between neutrons and other environmental radiation. This novel detector therefore combines high-selective counting electronics with large-scale instrumentation technology. | ||
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