Search Results - "Feller, W B"

Non-destructive studies of fuel pellets by neutron resonance absorption radiography and thermal neutron radiography by Tremsin, A.S., Vogel, S.C., Mocko, M., Bourke, M.A.M., Yuan, V., Nelson, R.O., Brown, D.W., Feller, W.B.

“…Many isotopes in nuclear materials exhibit strong peaks in neutron absorption cross sections in the epithermal energy range (1–1000eV). These peaks (often…”
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Imaging of dynamic magnetic fields with spin-polarized neutron beams by Tremsin, A S, Kardjilov, N, Strobl, M, Manke, I, Dawson, M, McPhate, J B, Vallerga, J V, Siegmund, O H W, Feller, W B

“…Precession of neutron spin in a magnetic field can be used for mapping of a magnetic field distribution, as demonstrated previously for static magnetic fields…”
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High-Resolution Neutron Counting Sensor in Strain Mapping Through Transmission Bragg Edge Diffraction by Tremsin, A. S., McPhate, J. B., Vallerga, J. V., Siegmund, O. H. W., Kockelmann, W., Steuwer, A., Feller, W. B.

“…High-resolution neutron counting sensors with mi crochannel plates coupled to a Timepix readout enable high spatial (~55 μm) and temporal (~1 μs) accuracy for…”
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Neutron resonance transmission spectroscopy with high spatial and energy resolution at the J-PARC pulsed neutron source by Tremsin, A.S., Shinohara, T., Kai, T., Ooi, M., Kamiyama, T., Kiyanagi, Y., Shiota, Y., McPhate, J.B., Vallerga, J.V., Siegmund, O.H.W., Feller, W.B.

“…The sharp variation of neutron attenuation at certain energies specific to particular nuclides (the lower range being from ~1eV up to ~1keV), can be exploited…”
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Improved efficiency of high resolution thermal and cold neutron imaging by Tremsin, A.S., McPhate, J.B., Vallerga, J.V., Siegmund, O.H.W., Feller, W.B., Lehmann, E., Dawson, M.

“…Spatial resolution and detection efficiency of neutron imaging detectors are the crucial parameters defining the ultimate resolution in neutron radiography,…”
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Bright flash neutron radiography capability of the research reactor at the McClellan Nuclear Research Center by Tremsin, A.S., Lerche, M., Schillinger, B., Feller, W.B.

“…The capability to produce a bright, short neutron pulse at the McClellan Nuclear Research Center (MNRC) can be very attractive for some neutron imaging…”
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High-resolution neutron microtomography with noiseless neutron counting detector by Tremsin, A.S., McPhate, J.B., Vallerga, J.V., Siegmund, O.H.W., Feller, W.B., Lehmann, E., Butler, L.G., Dawson, M.

“…The improved collimation and intensity of thermal and cold neutron beamlines combined with recent advances in neutron imaging devices enable high-resolution…”
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High Resolution Neutron Resonance Absorption Imaging at a Pulsed Neutron Beamline by Tremsin, A. S., McPhate, J. B., Vallerga, J. V., Siegmund, O. H. W., Kockelmann, W., Schooneveld, E. M., Rhodes, N. J., Feller, W. B.

“…The existence of resonance peaks in neutron absorption spectra in the epithermal range of energies enables unique non-destructive testing techniques. The deep…”
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Scatter rejection in quantitative thermal and cold neutron imaging by Tremsin, A.S., Kardjilov, N, Dawson, M, Strobl, M., Manke, I., McPhate, J.B., Vallerga, J.V., Siegmund, O.H.W., Feller, W.B.

“…The accuracy of quantitative neutron transmission radiography can be substantially decreased if highly scattering materials, such as water or plastics, exist…”
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Microchannel plate special nuclear materials sensor by Feller, W.B., White, P.L., White, P.B., Siegmund, O.H.W., Martin, A.P., Vallerga, J.V.

“…Nova Scientific Inc., is developing for the Domestic Nuclear Detection Office (DNDO SBIR #HSHQDC-08-C-00190), a solid-state, high-efficiency neutron detection…”
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The efficiency of thermal neutron detection and collimation with microchannel plates of square and circular geometry by Tremsin, A.S., Feller, W.B., Downing, R.G., Mildner, D.F.R.

“…Detectors with microchannel plates (MCPs) are currently widely used in photon and charged particle detection with high spatial (/spl sim/10 /spl mu/m) and…”
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A high resolution neutron counting sensors in strain mapping through a transmission bragg edge diffraction by Tremsin, A S, McPhate, J B, Vallerga, J V, Siegmund, O H W, Steuwer, A, Kockelmann, W, Feller, W B

“…High resolution neutron counting sensors with microchannel plates coupled to a Timepix readout enable high spatial (~55 μm) and temporal (~1 μs) accuracy for…”
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Very compact high performance microchannel plate thermal neutron collimators by Tremsin, A.S., Mildner, D.F.R., Feller, W.B., Downing, R.G.

“…In most neutron scattering experiments and in boron neutron capture therapy, the angular spread of the neutron beam is defined by the quality of the neutron…”
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The dynodized microchannel plate model and secondary electron emission by Feller, W.B.

“…Results are presented of an analysis of secondary electron emission data as applied to a currently accepted model of microchannel plate behavior. It is shown…”
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High resolution neutron imaging capabilities at BOA beamline at Paul Scherrer Institut by Tremsin, A.S., Morgano, M., Panzner, T., Lehmann, E., Filgers, U., Vallerga, J.V., McPhate, J.B., Siegmund, O.H.W., Feller, W.B.

“…The cold neutron spectrum of the Beamline for neutron Optics and other Applications (BOA) at Paul Scherrer Institut enables high contrast neutron imaging…”
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High-Resolution Strain Mapping Through Time-of-Flight Neutron Transmission Diffraction with a Microchannel Plate Neutron Counting Detector by Tremsin, A. S., McPhate, J. B., Steuwer, A., Kockelmann, W., M Paradowska, A., Kelleher, J. F., Vallerga, J. V., Siegmund, O. H. W., Feller, W. B.

“…:  Conventional neutron radiography can be strongly enhanced by obtaining Bragg‐edge information spatially correlated with the attenuation coefficient. This…”
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On the possibility to image thermal and cold neutron with sub-15 μm spatial resolution by Tremsin, A.S., Vallerga, J.V., McPhate, J.B., Siegmund, O.H.W., Feller, W.B., Crow, L., Cooper, R.G.

“…Due to the absence of efficient neutron focusing optics the spatial resolution needed for neutron imaging requires either a high-resolution detector, as in the…”
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High resolution Bragg edge transmission spectroscopy at pulsed neutron sources: Proof of principle experiments with a neutron counting MCP detector by Tremsin, A.S., McPhate, J.B., Kockelmann, W., Vallerga, J.V., Siegmund, O.H.W., Feller, W.B.

“…The high spatial and temporal resolution of a neutron counting detector using microchannel plates (MCPs) combined with Medipix2/Timepix readout can…”
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Detection efficiency, spatial and timing resolution of thermal and cold neutron counting MCP detectors by Tremsin, A.S., McPhate, J.B., Vallerga, J.V., Siegmund, O.H.W., Hull, J.S., Feller, W.B., Lehmann, E.

“…Neutron counting detectors with boron or gadolinium doped microchannel plates (MCPs) have very high detection efficiency, spatial and temporal resolution, and…”
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Microchannel plate operation at high count rates: new results by Tremsin, A.S., Pearson, J.F., Fraser, G.W., Feller, W.B., White, P.

“…We describe an experimental study of two distinct microchannel plate (MCP) detector configurations with extended dynamic range. First, we report on…”
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