Detection efficiency, spatial and timing resolution of thermal and cold neutron counting MCP detectors

Tremsin, Anton S.; McPhate, Jason B.; Vallerga, J. V.; Siegmund, Oswald H. W.; Hull, Jeffrey S.; Feller, W. Bruce; Lehmann, Eberhard

doi:10.1016/j.nima.2009.01.041

Cited by 84 publications

(68 citation statements)

References 16 publications

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“…By increasing the applied high voltage to the MCP or adjusting the threshold level, the absolute detection efficiency would be improved to the detection efficiency values exceeding 50%, as demonstrated previously. (4,8,10) In order to validate the simple evaluation procedures of the wavelength-dependent detection efficiency, we compared the efficiency curve with the absolute detection efficiency measured at the IMAT beamline, where the neutron flux was evaluated with the GS1 reference detector. Figure 4 shows the absolute detection efficiency of the MCP/Timepix detector evaluated at the IMAT beamline.…”

Section: Methodsmentioning

confidence: 99%

“…(6,7) Some basic performances of the MCP/Timepix detector, such as the detection efficiency, and spatial and time resolutions, have already been investigated. (8,9) However, no detailed study on the energy-dependent or wavelength-dependent detection efficiency has been carried out for the present generation of devices, except for the theoretical predictions (4,10) and experimental data are sparse. (8) This information is useful for planning experiments of new energy-selective imaging applications, such as neutron resonance transmission imaging and stress mapping via Bragg-edge analysis.…”

Section: Introductionmentioning

confidence: 99%

“…(8,9) However, no detailed study on the energy-dependent or wavelength-dependent detection efficiency has been carried out for the present generation of devices, except for the theoretical predictions (4,10) and experimental data are sparse. (8) This information is useful for planning experiments of new energy-selective imaging applications, such as neutron resonance transmission imaging and stress mapping via Bragg-edge analysis. (11,12) In this paper, we propose simple procedures for evaluating the energy-or wavelength-dependent detection efficiency of the MCP/Timepix detector.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Wavelength-Dependent Detection Efficiency of Neutron-Sensitive Microchannel Plate Detector

Watanabe

Minniti

Kockelmann

et al. 2017

Sensors and Materials

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The microchannel plate (MCP)/Timepix is one of the promising candidates for highperformance neutron imaging detectors. Since it is important to know the detection efficiency to plan experiments, we propose simple procedures to evaluate the wavelength-dependent detection efficiency of the MCP/Timepix detector. The wavelength-dependent efficiency curve can easily be evaluated by comparison with the neutron-induced prompt gamma-ray counts. The efficiency increases with the wavelength up to roughly 5 Å and eventually saturates. All neutrons with a wavelength of more than 5 Å are fully absorbed in the neutron-sensitive MCP. The activation effect in the MCP/Timepix detector is also investigated. We confirmed additional counts originating from the activation effect of aluminum, which was used in the detector entrance window. The contribution of the additional counts due to the detector activation was less than 10 −4 compared with the neutron counts.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of Wavelength-Dependent Detection Efficiency of Neutron-Sensitive Microchannel Plate Detector

Watanabe

Minniti

Kockelmann

et al. 2017

Sensors and Materials

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“…MCPs are used in time-of-flight mass spectroscopy for detecting ion fragments [78,193], while boron-doped MCPs have been used for neutron detection [73][74][75][76], where timing of the neutron events allows distinction of cold and thermal neutrons, and thus allows simultaneous imaging at different neutron energies. In autoradiography, MCPs are used for detecting decay emissions from radioactively labelled samples [194,195].…”

Section: Other Applicationsmentioning

confidence: 99%

Wide-field TCSPC: methods and applications

Hirvonen

Suhling

2016

Meas. Sci. Technol.

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“…Then, the electron avalanche is detected by the CCD. With this technique the obtained spatial resolution is approximately 60 micrometers, which is essentially given by the channel spacing [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Development of a novel neutron detection technique by using a boron layer coating a Charge Coupled Device

Blostein¹,

Estrada²,

Tartaglione³

et al. 2015

J. Inst.

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This article describes the design features and the first test measurements obtained during the installation of a novel high resolution 2D neutron detection technique. The technique proposed in this work consists of a boron layer (enriched in 10 B) placed on a scientific Charge Coupled Device (CCD). After the nuclear reaction 10 B(n,) 7 Li, the CCD detects the emitted charge particles thus obtaining information on the neutron absorption position. The abovementioned ionizing particles, with energies in the range 0.5-5.5 MeV, produce a plasma effect in the CCD which is recorded as a circular spot. This characteristic circular shape, as well as the relationship observed between the spot diameter and the charge collected, is used for the event recognition, allowing the discrimination of undesirable gamma events. We present the first results recently obtained with this technique, which has the potential to perform neutron tomography investigations with a spatial resolution better than that previously achieved. Numerical simulations indicate that the spatial resolution of this technique will be about 15 m, and the intrinsic detection efficiency for thermal neutrons will be about 3 %. We compare the proposed technique with other neutron detection techniques and analyze its advantages and disadvantages.

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Detection efficiency, spatial and timing resolution of thermal and cold neutron counting MCP detectors

Cited by 84 publications

References 16 publications

Evaluation of Wavelength-Dependent Detection Efficiency of Neutron-Sensitive Microchannel Plate Detector

Evaluation of Wavelength-Dependent Detection Efficiency of Neutron-Sensitive Microchannel Plate Detector

Wide-field TCSPC: methods and applications

Development of a novel neutron detection technique by using a boron layer coating a Charge Coupled Device

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