NESSA: a compact 14 MeV D-T neutron source facility at Uppsala University
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911696232120320 |
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| author | Dawn, Sandipan Arnqvist, Elias Ericsson, Göran Hägg, Linus Jarl-Holm, Stefan Lantz, Mattias Lindner, Andreas Sundén, Erik Andersson Pomp, Stephan |
| author_facet | Dawn, Sandipan Arnqvist, Elias Ericsson, Göran Hägg, Linus Jarl-Holm, Stefan Lantz, Mattias Lindner, Andreas Sundén, Erik Andersson Pomp, Stephan |
| contents | The NESSA (Neutron Source in Uppsala) facility hosts a compact 14 MeV deuterium-tritium sealed tube neutron generator at the Ångström Laboratory, Uppsala University. The generator, housed in a bunker inside the FREIA hall, reaches a maximum yield of $4.7\times10^{8}$ n/s. This paper describes the facility: the generator, the bunker and its shielding, the detector systems, and the Monte Carlo models used to characterize the neutron field. We also report the first commissioning measurements: yield calibration with $^{93}$Nb activation foils, fission chamber response at two positions, and simulated air and structural activation. Initial indium foil activations and single event effect (SEE) tests on silicon devices are also presented. The facility will be used for nuclear data measurements, neutron detector response studies, moderation and thermalization experiments, irradiation testing of electronics as well as for training and education. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_18929 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | NESSA: a compact 14 MeV D-T neutron source facility at Uppsala University Dawn, Sandipan Arnqvist, Elias Ericsson, Göran Hägg, Linus Jarl-Holm, Stefan Lantz, Mattias Lindner, Andreas Sundén, Erik Andersson Pomp, Stephan Instrumentation and Detectors Nuclear Experiment Accelerator Physics The NESSA (Neutron Source in Uppsala) facility hosts a compact 14 MeV deuterium-tritium sealed tube neutron generator at the Ångström Laboratory, Uppsala University. The generator, housed in a bunker inside the FREIA hall, reaches a maximum yield of $4.7\times10^{8}$ n/s. This paper describes the facility: the generator, the bunker and its shielding, the detector systems, and the Monte Carlo models used to characterize the neutron field. We also report the first commissioning measurements: yield calibration with $^{93}$Nb activation foils, fission chamber response at two positions, and simulated air and structural activation. Initial indium foil activations and single event effect (SEE) tests on silicon devices are also presented. The facility will be used for nuclear data measurements, neutron detector response studies, moderation and thermalization experiments, irradiation testing of electronics as well as for training and education. |
| title | NESSA: a compact 14 MeV D-T neutron source facility at Uppsala University |
| topic | Instrumentation and Detectors Nuclear Experiment Accelerator Physics |
| url | https://arxiv.org/abs/2605.18929 |