3,308 research outputs found
Research in the development effort of an improved multiplier phototube final report
Single electron counting characteristics of multiplier phototubes - Pulse height distribution of windowless multiplie
Research in the development effort of an improved multiplier phototube Seventh quarterly report
Test data on effective photocathode size, response uniformity, and pulse amplitude distribution of multiplier phototube
Research in the development of an improved multiplier phototube Final report
Cascade aperture design, gas pressure effects, gain calibration, and photon counting efficiency of multiplier phototub
Multiple jet study data correlations
Correlations are presented which allow determination of penetration and mixing of multiple cold air jets injected normal to a ducted subsonic heated primary air stream. Correlations were obtained over jet-to-primary stream momentum flux ratios of 6 to 60 for locations from 1 to 30 jet diameters downstream of the injection plane. The range of geometric and operating variables makes the correlations relevant to gas turbine combustors. Correlations were obtained for the mixing efficiency between jets and primary stream using an energy exchange parameter. Also jet centerplane velocity and temperature trajectories were correlated and centerplane dimensionless temperature distributions defined. An assumption of a Gaussian vertical temperature distribution at all stations is shown to result in a reasonable temperature field model. Data are presented which allow comparison of predicted and measured values over the range of conditions specified above
Research in the development of an improved multiplier phototube Final report
Counting efficiency, noise factor measurement, dark noise, gain and counting rate, optical enhancemen
Research in the development of an improved multiplier phototube
Performance and response characteristics of smoothing, image intensifier dissector for low light level astronomy and optical detectio
Research in the development of an improved multiplier phototube
Parameters in analog /dc/ and digital /single electron pulse count/ modes of processing data from photomultiplier tube
Research in the development effort of an improved multiplier phototube third quarterly report
First dynode gain mapping for improving multiplier phototub
Dual Behavior of Antiferromagnetic Uncompensated Spins in NiFe/IrMn Exchange Biased Bilayers
We present a comprehensive study of the exchange bias effect in a model
system. Through numerical analysis of the exchange bias and coercive fields as
a function of the antiferromagnetic layer thickness we deduce the absolute
value of the averaged anisotropy constant of the antiferromagnet. We show that
the anisotropy of IrMn exhibits a finite size effect as a function of
thickness. The interfacial spin disorder involved in the data analysis is
further supported by the observation of the dual behavior of the interfacial
uncompensated spins. Utilizing soft x-ray resonant magnetic reflectometry we
have observed that the antiferromagnetic uncompensated spins are dominantly
frozen with nearly no rotating spins due to the chemical intermixing, which
correlates to the inferred mechanism for the exchange bias.Comment: 4 pages, 3 figure
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