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