Neutron imaging and tomography with Medipix2 and dental micro-roentgenography

Jakůbek, J.; Granja, Carlos; Holý, T.; Lehmann, Eberhard; Linhart, V.; Pospı́šil, S.; Rypar, V.; Uher, J.; Vacı́k, J.; Vavřı́k, Daniel; Vykydal, Z.; Cevallos, Marissa

doi:10.1016/j.nima.2006.08.043

Cited by 16 publications

(8 citation statements)

References 9 publications

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“…That capability of event localization is the main difference between MCP-Medipix neutron counting and neutron detection by the sensors utilizing solid state converters deposited on a Medipix readout. The latter sensors developed by our colleagues at Czech Technical University were very successfully tested in neutron radiographic applications providing spatial resolution better than 100 mm [10,11]. The MCP technology should enable improvement of spatial resolution down to a single pore level ($10 mm), providing the readout can encode the MCP signal with that accuracy.…”

Section: Spatial Resolution Of Neutron Detectionmentioning

confidence: 99%

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

Tremsin

McPhate

Vallerga

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Spatial Resolution Of Neutron Detectionmentioning

confidence: 99%

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

Tremsin

McPhate

Vallerga

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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“…Recently Medipix2 has been used for high resolution imaging [16] as well as for thermal and fast neutron fluence monitoring in the high energy physics (HEP) detector barrel as a Radiation Damage Monitoring (RDM) system by use of a partial cover of Medipix2 with Li and PE converters [22].…”

Section: Design Of the Novel Dosimetermentioning

confidence: 99%

“…This detector was primarily developed for X-ray imaging [15], with more recent adoption to neutron imaging through use of suitable converters [16].…”

mentioning

confidence: 99%

Neutron Dosimeter Development Based on Medipix2

Othman

Petasecca

Guatelli

et al. 2010

IEEE Trans. Nucl. Sci.

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Abstract-A novel neutron dosimetry system for avionics and space applications is described. The new dosimetric system is based on Medipix2, a high density silicon based pixilated detector with integrated readout and digital interface circuitry. Real time dose equivalent response to fast neutron fields with flattened energy response is achieved through the coupling of a structured variable thickness polyethylene (PE) over layer with the high density pixilated detector. Experimental results obtained to 14 MeV D-T and Am-Be neutron fields are described along with a comparison to results obtained with GEANT4 simulations.Index Terms-GEANT4, Medipix2, neutron dosimetry.

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“…Some of those readouts allow very high spatial T 2007 IEEE Nuclear Science Symposium Conference Record N14-6 (~10 μm FWHM with cross strip anodes, [22] and as low as 5 μm with charge sensitive active pixel ASIC [23]) and timing (~100 ps, [12], [13]) resolution with limited counting rate (currently not exceeding tens of kilohertz), while others (e.g. frame-based active pixel sensor Medipix2 [24]) allow very high counting rates (exceeding 100 MHz level) with spatial resolution limited by 55 μm pixels [25]. A number of new readouts under development should lead to further improvements in detector resolution.…”

Section: Neutron Detection With Mcpsmentioning

confidence: 99%

“…Schematic diagram of the neutron imaging detector. A pcb board with the Medipix2 readout (14x14 mm 2 active area) [24] is mounted behind the stack of microchannel plates. The gap between the Medipix2 active surface and MCP stack is 700 μm.…”

Section: Detector Configuration and Experimental Seupmentioning

confidence: 99%

High resolution neutron imaging at high counting rates with noiseless readout

Tremsin

Vallerga

McPhate

et al. 2007

2007 IEEE Nuclear Science Symposium Conference Record

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We describe the design and report on the experimental results of a novel thermal and cold neutron imaging detector utilizing neutron sensitive ( 10 B-doped) microchannel plates (MCPs). In this detector, the incoming neutron interaction products produce secondary electrons at the pores adjacent to the absorption point within the MCP glass. This electron signal is then multiplied by a stack of conventional MCPs within those adjacent pores limiting the spread of the signal to less than two pore diameters (currently 6-10 μm pores on 8-12 μm centers). The event position then can be encoded by a number of readout techniques already developed for photon/charged particle counting applications. This paper presents the results of experimental evaluation of neutron sensing MCP detector with Medipix2 readout allowing operation at high counting rate mode (>100 MHz level) at a spatial resolution limited by the 55 μm pixel size of the Medipix2 readout. Other attractive features of MCP neutron detectors are their high detection efficiency (approaching 50% levels) for thermal and cold neutrons and the absence of readout noise.

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Neutron imaging and tomography with Medipix2 and dental micro-roentgenography

Cited by 16 publications

References 9 publications

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

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

Neutron Dosimeter Development Based on Medipix2

High resolution neutron imaging at high counting rates with noiseless readout

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