The European Spallation Source (ESS), presently well on its way to completion, will soon provide the most intense neutron beams for multi-disciplinary science. Fortuitously, it will also generate the largest pulsed neutrino flux suitable for the detection of Coherent Elastic Neutrino-Nucleus Scattering (CEνNS), a process recently measured for the first time at ORNL’s Spallation Neutron Source. We describe innovative detector technologies maximally able to profit from the order-of-magnitude increase in neutrino flux provided by the ESS, along with their sensitivity to a rich particle physics phenomenology accessible through high-statistics, precision CEνNS measurements.

/pdf/coherent-elastic-neutrino-nucleus-scattering-at-the-european-3o2ah8wgal.pdf

Coherent elastic neutrino-nucleus scattering at the European Spallation Source

https://backend.orbit.dtu.dk/ws/files/199325872/main.pdf

NCrystal: A library for thermal neutron transport

The European Spallation Source (ESS), presently well on its way to completion, will soon provide the most intense neutron beams for multi-disciplinary science. Fortuitously, it will also generate the largest pulsed neutrino flux suitable for the detection of Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS), a process recently measured for the first time at ORNL's Spallation Neutron Source. We describe innovative detector technologies maximally able to profit from the order-of-magnitude increase in neutrino flux provided by the ESS, along with their sensitivity to a rich particle physics phenomenology accessible through high-statistics, precision CE$\nu$NS measurements.

/pdf/coherent-elastic-neutrino-nucleus-scattering-at-the-european-24clcezdfk.pdf

Coherent Elastic Neutrino-Nucleus Scattering at the European Spallation Source

At the European Spallation Source (ESS), neutrons will be generated by spallation induced by a 2-GeV proton beam on a tungsten target. ESS will have a grid of 42 beamports available for a variety of neutron scattering experiments. Neutron moderators will provide thermal and cold neutrons to the instruments, allowing bispectral beam extraction wherever needed. The moderators were designed by adopting a holistic design approach that has considered brightness, brightness transfer and beam extraction constraints, resulting in a system with the following main features: low-dimensional moderators for enhanced brightness and maximum flux to the sample; a single moderator system placed above the spallation target; lateral shape of the moderators optimized for bispectral extraction. A moderator with a vertical extraction surface of 3 cm was chosen as result of the optimization process. With all initial instruments pointing to the top moderator, and a beamport system that allows the possibility to extract neutrons from above and below the target, the adopted configuration opens the possibility to have different types of moderators below the target, so that other neutron beams of different intensity, or spectral shape, with respect to the ones delivered by the top moderator, could be envisaged, adding additional scientific opportunities to the facility without having the need to build a second target station.

/pdf/design-of-the-cold-and-thermal-neutron-moderators-for-the-1hxk1ngr9l.pdf

Design of the cold and thermal neutron moderators for the European Spallation Source

Mechanical properties of tungsten irradiated with high-energy protons and spallation neutrons

The European Spallation Source Design

https://iopscience.iop.org/article/10.1088/1402-4896/aaecea/pdf

D. Phan

Papers

The European Spallation Source Design

Corrigendum: The European Spallation Source Design (2018 Phys. Scr. 93 014001)