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The problems encountered in the electrical excitation of pulsed CO 2 lasers operating at atmospheric pressure are briefly reviewed, with some solutions developed at the Defence Research Establishment Valcartier, and their limitations. A new approach, based on a double transverse discharge...
In this paper we describe a circuit for reducing the transmitter ringdown time and thereby improving the recovery time in pulse NMR experiments. The circuit uses only solid state devices and requires no external switching. For transmitter voltages less than 0.5 V peak to peak the effective...
An apparatus is described for the measurement of internal friction under conditions of hydrostatic pressure transmitted by a liquid. The material to be tested is in the form of a helical spring. The motion of this spring under the influence of an axial sinusoidal force is compared to the motion...
A quartz fiber electrometer (QFE) dosimeter system has been designed, developed, and tested to demonstrate the applicability of small dosimeters of the Neher type for use as space qualified instruments. The electrometer consists of a 3 mm diam×30 mm cylindrical quartz rod partially coated with...
An experimental procedure is proposed, which amounts to Fourier transforming the frequency depending torque in the Ogawa's torsion pendulum method. This reduces by a factor of the order 100 the fairly long times needed for measuring the very low conductivities of insulating materials.
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