Monte-Carlo simulation of fast neutron detection with timepix

Uher, J.; Jakůbek, J.

doi:10.1109/nssmic.2009.5402355

Cited by 4 publications

(10 citation statements)

References 4 publications

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“…However, some of the protons are not entirely stopped in the detector and deposit only part of their energy. This, together with limited energy resolution of the detector leads to a non-flat energy spectrum [2], [3]. Figure 12 shows the measured DT neutron spectrum compared with a result from a MonteCarlo simulation, which simulated the elastic neutron collisions with protons in the plastic converter and the following proton transport.…”

Section: Dt Energy Spectramentioning

confidence: 99%

“…The scattered neutron can pass through the Timepix and further recoil another proton in the scintillator of the next Scintillator + Timepix detector pair. Analysis of the proton tracks in the Timepix devices and the energies that the protons lose in the plastic scintillators allows calculation of the energy and direction of the original neutron [2], [3].…”

Section: Introductionmentioning

confidence: 99%

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Proton beam characterisation of a prototype thin-tile plastic scintillator detector with SiPM readout for use in fast-neutron tracker

et al. 2012

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, J. (2012). Proton beam characterisation of a prototype thin-tile plastic scintillator detector with SiPM readout for use in fast-neutron tracker. Journal of Instrumentation, 7 (2), 1-14. ABSTRACT: We present details of the construction and characterisation of a prototype thin-tile plastic scintillation detector for use in a multi-layer Fast Neutron Tracker. Scintillation light is read out using solid-state silicon photomultiplier detectors (SiPMs). The Tracker consists of alternating scintillator and Timepix detector layers. The scintillator tile provides a hydrogen-rich target, in which impinging fast neutrons produce recoil protons. The energy lost by protons in the plastic scintillator are measured and recoil protons exiting the scintillator are tracked in the Timepix detector. The combination of signals from the scintillator and Timepix provides information to reconstruct the energy or direction of the impinging neutron, using calculations based on the kinematics of the elastic neutron scattering. Proton Beam Characterisation of aThree prototype scintillation detectors were constructed, using either a pair of 3x3 mm sensitive area SPMMicro3035 SiPMs from SensL or a pair of MAPD-3n SiPMs from Zecotek. The detector performances were characterised using a mono-energetic proton beam. An absolute energy calibration was measured at 3, 4 and 5 MeV proton energies with good linearity. The best measured energy resolution was 29.8% at 5 MeV. Spatial uniformity was assessed by measuring the response across the detector face. Finally, the tile detector's ability to provide a trigger for Timepix acquisition in the stack configuration was demonstrated for single and double neutron recoil events using a DT neutron source. The SiPM-based design was found to be well-suited for the application of the multi-layer fast neutron tracker.

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Section: Dt Energy Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Proton beam characterisation of a prototype thin-tile plastic scintillator detector with SiPM readout for use in fast-neutron tracker

et al. 2012

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“…Details of the simulation code were already published in [7]. The geometry of the simulated detector setup was for purposes of the simulation extended by a second scintillator+Timepix detection layer as shown in Fig.…”

Section: Monte-carlo Simulation Descriptionmentioning

confidence: 99%

“…Thus, the recoiled carbon nuclei are not tracked in the simulation. Further discussion of the neutron background suppression was published in [7].…”

Section: Monte-carlo Simulation Descriptionmentioning

confidence: 99%

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Monte-Carlo simulation of fast neutron detection using double-scatter events in plastic scintillator and Timepix

Uher

Jakůbek

2010

IEEE Nuclear Science Symposuim &Amp; Medical Imaging Conference

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The Timepix is a semiconductor pixelated detector that measures charge collected in each of its 256×256 pixels (55 μm pitch). Therefore, it is capable of measuring the energy and position of incoming radiation quanta at the same time. We are developing a spectroscopy and radiography technique for fast-neutrons based on the tracking of recoiled protons. The detector combines a Timepix device with a plastic scintillator readout using a silicon photomultiplier (SiPM). Fast neutrons recoil protons from the plastic scintillator. The SiPM records the energy, which protons lose in the scintillator before entering the Timepix. The Timepix then measures the remainder of the proton's energy and its direction. In case of a setup consisting of a single Timepix and scintillator, the reconstruction of the neutron's energy requires knowledge of the incoming neutron direction (or the source position); similarly, the incoming neutron energy must be known to reconstruct the direction of the incoming neutron. This paper presents results of Monte-Carlo simulations of a stacked detector that combines two layers of scintillator+Timepix. The stacked arrangement allows recording events when recoiled protons are produced in both the top and bottom scintillators. Such events allow reconstruction of both the incoming neutron energy and direction.Simulated detected proton spectra were compared with experiment and details of the neutron source energy and position reconstruction algorithm are shown. 978-1-4244-9105-6/10/$26.00 ©2010 IEEE

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Detection of fast neutrons with particle tracking detector Timepix combined with plastic scintillator

Uher

Jakůbek

2011

Radiation Measurements

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Monte-Carlo simulation of fast neutron detection with timepix

Cited by 4 publications

References 4 publications

Proton beam characterisation of a prototype thin-tile plastic scintillator detector with SiPM readout for use in fast-neutron tracker

Proton beam characterisation of a prototype thin-tile plastic scintillator detector with SiPM readout for use in fast-neutron tracker

Monte-Carlo simulation of fast neutron detection using double-scatter events in plastic scintillator and Timepix

Detection of fast neutrons with particle tracking detector Timepix combined with plastic scintillator

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