Geant4 based simulations for novel neutron detector development

Kittelmann, T.; Stefanescu, I.; Kanaki, K.; Boin, Mirko; Hall-Wilton, R.; Zeitelhack, K.

doi:10.1088/1742-6596/513/2/022017

Cited by 35 publications

(36 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the energy region above 1 MeV, the 3 He recoil is the predominant process. In To support the experimental analysis a Geant4 [42][43][44] simulation model is built within the ESS Detector Group simulation framework [45]. The geometry matches the experimental set-up for all three configurations, as seen in figure 3.…”

Section: Simulationsmentioning

confidence: 99%

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

et al. 2019

View full text Add to dashboard Cite

The 3 He-based neutron detectors are no longer the default solution for neutron scattering applications. Both the inability of fulfilling the requirements in performance, needed for the new instruments, and the shortage of 3 He, drove a series of research programs aiming to find new technologies for neutron detection. The characteristics of the new detector technologies have been extensively tested to prove their effectiveness with respect to the state-of-the-art technology.Among these, the background rejection capability is crucial to determine. The signal-to-background ratio is strongly related to the performance figure-of-merit for most instruments. These are designed to exploit the high flux expected from the new high intensity neutron sources. Therefore, an inadequate background rejection could significantly affect the measurements, leading to detector saturation and misleading events. This is of particular importance for the kind of techniques in which the signals are rather weak.For the first time, the sensitivity of 3 He detectors to fast neutrons, up to E n = 10 MeV, has been estimated. Two independent measurements are presented: a direct calculation based on a subtraction method used to disentangle the thermal and the fast neutron contribution, while a further evidence is calculated indirectly through a comparison with the recently published data from a 10 B-based detector. Both investigations give a characterization on the order of magnitude for the sensitivity. A set of simulations is presented as well in order to support and to validate the results of the measurements. A sensitivity of 4 · 10 −3 is observed from the data. This is two orders of magnitude higher than that previously observed in 10 B-based detectors.

show abstract

Section: Simulationsmentioning

confidence: 99%

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As the diffractive processes for low energy neutrons are not part of Geant4, the polycrystaline NXSLib [31]- [33] library from McStas [34] was incorporated for allowing coherent scattering to be treated correctly for the energies and materials of interest [35], [36]. The effect on the neutron scattering cross sections is depicted in Fig.…”

Section: Validation Of Geant4 Simulation Resultsmentioning

confidence: 99%

An alternative small angle neutron scattering detector

Kanaki

Birch

Hall-Wilton

et al. 2013

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

View full text Add to dashboard Cite

An alternative detector design for Small Angle Neutron Scattering (SANS) applications is currently under development at the European Spallation Source (ESS). Given the unavailability and high price of 3 He, this detector design utilizes gaseous detectors with 10 B as neutron converter and is ideally suited for a SANS instrument at the ESS. The novel aspects of the geometry, exploiting the properties of the converting material, in combination with the performance of the detector are addressed by means of analytical calculations, as well as detailed Monte Carlo simulations using a customized version of Geant4. Last but not least, the progress on the conceptual prototype design is presented.

show abstract

“…"HP" states that high-precision neutron tracking model is used to transport neutrons below 20 MeV down to thermal energies [22]. Apart from the standard Geant4 toolkit, the computational framework, developed and maintained by ESS Detector Group [23,24], was used for the simulations. It provides useful data analysis formats and computing cluster parallelization.…”

Section: Model Of Sinq In Geant4mentioning

confidence: 99%

Benchmarking shielding simulations for an accelerator-driven spallation neutron source

Cherkashyna

DiJulio

Panzner

et al. 2015

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

The shielding at an accelerator-driven spallation neutron facility plays a critical role in the performance of the neutron scattering instruments, the overall safety, and the total cost of the facility. Accurate simulation of shielding components is thus key for the design of upcoming facilities, such as the European Spallation Source (ESS), currently in construction in Lund, Sweden. In this paper, we present a comparative study between the measured and the simulated neutron background at the Swiss Spallation Neutron Source (SINQ), at the Paul Scherrer Institute (PSI), Villigen, Switzerland. The measurements were carried out at several positions along the SINQ monolith wall with the neutron dosimeter WENDI-2, which has a well-characterized response up to 5 GeV. The simulations were performed using the Monte-Carlo radiation transport code Geant4, and include a complete transport from the proton beam to the measurement locations in a single calculation. An agreement between measurements and simulations is about a factor of 2 for the points where the measured radiation dose is above the background level, which is a satisfactory result for such simulations spanning many energy regimes, different physics processes and transport through several meters of shielding materials. The neutrons contributing to the radiation field emanating from the monolith were confirmed to originate from neutrons with energies above 1 MeV in the target region. The current work validates Geant4 as being well suited for deep-shielding calculations at accelerator-based spallation sources. We also extrapolate what the simulated flux levels might imply for short (several tens of meters) instruments at ESS.

show abstract

Geant4 based simulations for novel neutron detector development

Cited by 35 publications

References 11 publications

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

An alternative small angle neutron scattering detector

Benchmarking shielding simulations for an accelerator-driven spallation neutron source

Contact Info

Product

Resources

About