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A coaxial electron beam generator has been developed which produces current densities of 1–3 A cm −2 at the anode foil, is compact (Marx ∼0.2 m 3 ) and yet utilizes an anode of 50 cm length and 250 cm 3 volume. Carbon cathodes (carbon fibers and graphite felt) tested on this system have...
A simple circuit is given which will allow data transfer from a LSI‐11 DRV11 parallel interface unit to a PARC 1216 Optical Multichannel Detector Controller. The Circuit for OMA to LSI‐11 data transfer is slightly more complicated. Data buffering is used so that data transfer can occur...
A simple fatigue drive that permits fatiguing of specimens in the flexural mode at rates up to 30 Hz under ultrahigh vacuum conditions has been built and successfully tested in fatigue‐enhanced photoemission studies.
An experimental procedure is described making it possible to determine from one diffusion experiment both the diffusion coefficient D and the dependence of the refractive index on concentrations ∂μ/∂ c for many wavelengths of light. The results from the measurements of D and ∂μ/∂ c at 6...
We describe a new device to produce ribbons of disordered metals by ultrarapid quenching combining an arc furnace with a rotating cylinder. The characterization of samples of disordered La 70 Cu 30 and La 76 Au 24 prepared using this method shows good agreement with those obtained by other...
An on‐line computer controlled apparatus for measuring the contact electrification of polymers due to subsequent intermittent contacts is developed. The utilization of measuring probes and metal contact pins instead of the plotter pens of a programmable four‐colour plotter renders it possible...
We present the results of various measurements we have made to characterize Nuclepore filters. These include nitrogen and helium adsorption isotherms, heat capacity and SEM studies of pore size distribution and pore density.
In measuring the velocity of sound in materials with plate‐like of fibrous geometries, in thin foils, or in materials with high attenuation, the only clear signal is often after a single transit through the sample. A system is described which allows continuous measurements of changes of...
A 3 atm, 9×9×100 cm 3 uv preionized self‐sustained discharge module has been used as the basis for a compact nanosecond pulse CO 2 laser system. Up to 60 J has been extracted from the device in an ∼600 ps pulse. The high degree of gain uniformity and fast gain risetime demonstrated by the...
We report a simple scheme to install an effective thermal/vapor barrier for precision temperature baths. We have found that by floating on the water surface, a pile of common packing material such as styrofoam pellets fused together by a solvent spray, a ten‐fold reduction in the bath...
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