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30 June 2016 to 1 July 2016
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The Impossible and the Unusable? Neutron Detectors: from 2D to 4D Sensors

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Auditorium & Conference Room (Other Institutes)

Auditorium & Conference Room

Other Institutes

ESADE Business School, Avenida Pedralbes, 60-62, 08034 Barcelona, Spain.


Prof. Richard Hall-Wilton (ESS - European Spallation Source (SE))


This dream aspires to take neutron detectors from 2D position sensitive devices to 4D sensors with energy and timing information. These extra dimensions of information are presently seen as impossible and unusable respectively. Novel instrumentation is nearly always the forerunner of new diagnostic methods. This vision is about enabling new transformational instrumentation that subsequently leads to novel interrogation techniques.

The first additional dimension is the holy grail for neutron detectors: energy measurement. This is presently unachievable and seen as impossible, as the information on the neutron energy is lost in the nuclear conversion of the neutron to detectable products. Advanced statistical methods may give the possibility to measure this.

Secondly, present-day timing resolution on neutron detectors is limited, rarely better than 10us, as few applications today require even this moderate timing resolution. However, the nature of the interaction in a thin layer detector allow imagination of a timing resolution of a factor 100 or more. Complex correlations may allow the expoitation of this for as yet unimagined investigations, if this capability were developed.

The potential for achieving these future capabilities is grounded in the intensive R&D efforts that have come since the Helium-3 crisis, and in particular the Boron-10 thin film detectors, where the neutron interacts in very thin layers of neutron sensitive material. Successful R&D thus far has led to a plethora of replacement technologies, which can already equal the performance of Helium-3 detectors.

By using a multi-disciplinary approach with developments linked across mathematical and statistical methods, material science and thin film technologies, and detector technologies, achieving this dream would give revolutionary instrumentation that would be transformational for neutron interrogation techniques.


The vision and building blocks towards energy sensitive neutron detectors with ultimate timing resolution are outlined, which would revolutionise the capabilities of neutron detectors.

Primary author

Prof. Richard Hall-Wilton (ESS - European Spallation Source (SE))


Dr Carina Höglund (ESS AB) Dr Dragi Anevski (Mathematical Dept, Lunds Tekniska Hogskola, Sweden) Judith Freita Ramos (European Spallation Source) Dr Kalliopi Kanaki (European Spallation Source ERIC) Vladimir Pastukhov (Mathematical Dept, Lunds Tekniska Hogskola, Sweden)

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