Neutron Optics & Shielding
Standards in the design features and processes of neutron optical components in harmony with background minimisation are a key part of obtaining maximum return on investment for the instrument suite at ESS.
Given the high power of the ESS source, minimisation of instrument background ensures capability of measuring phenomena characterised by weak neutron scattering signals, and/or very small sample volumes, in shorter measurement times. The minimisation of the number of mechanical devices maximises instrument reliability and minimisation of cost within a performance envelope defined by requirements. This allows instruments to invest in other hardware with significant performance impact. These minimisation activities form the core activities of the group.
Publications involving members of the ESS Neutron Optics and Shielding Group
D.D. DiJulio, C.P. Cooper-Jensen, I. Llamas-Jansaa, S. Kazi, P.M. Bentley, Measurements and Monte-Carlo simulations of the particle self-shielding effect of B4C grains in neutron shielding concrete, Radiation Physics and Chemistry, Volume 147, June 2018, Pages 40–44.
Lars Wadsö, Carsten P. Cooper-Jensen, and Phillip M. Bentley, Assessing hydration disturbances from concrete aggregates with radiation shielding properties by isothermal calorimetry,
Phys. Rev. Accel. Beams 20, 043502, 24 April 2017.
D.D. DiJulio, C.P. Cooper-Jensen, H. Perrey, K. Fissum, E. Rofors, J. Scherzinger, P.M. Bentley, A Polyethylene-B4C based concrete for enhanced neutron shielding at neutron research facilities, Nuclear Inst. and Methods in Physics Research A, Volume 859, 1 July 2017, Pages 41–46.
D. M. Rodriguez, D. D. DiJulio, P. M. Bentley, “Systematic study on the performance of elliptic focusing neutron guides”, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 808:101-108 (2016)
K. Mantulnikovs, M. Bertelsen, C.P. Cooper-Jensen, K. Lefmann and E.B. Klinkby, Neutron guide shielding for the BIFROST spectrometer at ESS, Journal of Physics: Conference Series, Volume 746, Number 1
D. Martin Rodriguez, P. M. Bentley and C. Pappas, How to polarise all neutrons in one beam: a high performance polariser and neutron transport system, Journal of Physics: Conference Series, Volume 746, Number 1
Douglas D. DiJulio, Nataliia Cherkashyna, Julius Scherzinger, Anton Khaplanov, Dorothea Pfeiffer, Carsten P. Cooper-Jensen, Kevin G. Fissum, Kalliopi Kanaki, Oliver Kirstein, Georg Ehlers, Franz X. Gallmeier, Donald E. Hornbach, Erik B. Iverson, Robert J. Newby, Richard J. Hall-Wilton and Phillip M. Bentley, Characterization of the radiation background at the Spallation Neutron Source, Journal of Physics: Conference Series, Volume 746, Number 1
Douglas D. DiJulio, Konstantin Batkov, John Stenander, Nataliia Cherkashyna and Phillip M. Bentley, Benchmarking Geant4 for spallation neutron source calculations, Journal of Physics: Conference Series, Volume 746, Number 1
Valentina Santoro, Douglas D. DiJulio and Phillip M. Bentley, MeV Neutron Production from Thermal Neutron Capture in 6Li Simulated With Geant4, Journal of Physics: Conference Series, Volume 746, Number 1
D.D. DiJulio, H. Bjorgvinsdottir, C. Zendler, P.M. Bentley, Population-based metaheuristic optimization in neutron optics and shielding design, NIMA: 835 (2016) 157-162
C. Zendler and P. M. Bentley, Systematic neutron guide misalignment for an accelerator-driven spallation neutron source, Phys. Rev. Accel. Beams 19, 083501
D. D. DiJulio, C. P. Cooper-Jensen, H. Björgvinsdottir, Z. Kokai, and P. M. Bentley, High-energy in-beam neutron measurements of metal-based shielding for accelerator-driven spallation neutron sources, Phys. Rev. Accel. Beams 19, 053501
N. Cherkashyna, D. D. DiJulio, T. Panzner, E. Rantsiou, U. Filges, G. Ehlers and P. M. Bentley, "Benchmarking Shielding Simulations for an Accelerator-driven Spallation Neutron Source", Physical Review Special Topics Accelerators and Beams 18 083501 (2015)
J. Stenander, D. D. DiJulio, “Application of automated weight windows to spallation neutron source shielding calculations using Geant4”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 798 (2015)
C. Zendler, D. M. Rodriguez, P. M. Bentley, “Generic guide concepts for the European Spallation Source”, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 803 (2015)
N. Cherkashyna, R. J. Hall-Wilton, D. D. DiJulio et al, "Overcoming High Energy Backgrounds at Pulsed Spallation Sources", submitted to Proceedings of ICANS XXI (International Collaboration on Advanced Neutron Sources), Mito, Japan (2014)
N. Cherkashyna, K. Kanaki, T. Kittelmann et al, "High Energy Particle Background at Neutron Spallation Sources and Possible Solutions", J. Phys.: Conf. Ser. 528 012013 (2014)
D. D. Di Julio, E. Lelièvre-Berna, P. Courtois, K. H. Andersen and P. M. Bentley, “Optimization of Multi-Channel Neutron Focusing Guides for Extreme Sample Environments”, J. Phys.: Conf. Ser. 528 012006 (2014)
S. Jaksch et al., “Concept for a Time-of-Flight Small Angle Neutron Scattering Instrument at the European Spallation Source”, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 762 (2014)