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A bubble chamber designed to operate with 500 visible liters of liquid hydrogen has been tested for performance with liquid nitrogen at Argonne National Laboratory. It features unique systems for controlling chamber overpressure and minimizing thermal gradients within the working liquid....
A very simple and highly sensitive ``hot wire'' type level detector to be used with cryogenic liquids is described. The hot filament is made of tungsten wire of about 4 μ diam. The tests on the sensor were made moving the filament in and out of the quiescent surfaces of liquid helium and...
A compact data transmission system for crossing a high voltage interface has been built and tested. The system employs an infrared, incoherent light emitting diode and a silicon photodiode detector to telemeter the pulse width modulated signals. Departure from linearity was observed to be 2.7%...
This adiabatic solution calorimeter was designed specifically for thermochemical studies of the less familiar oxidation states of the rare earths. It has been used in the determination of the heats of solution of Pr, Eu, EuCl 2 , and Pr(NO 3 ) 3 in acids. Currently, it is being employed in the...
After reviewing the present state of knowledge concerning the technique of making high power sinusoidal pulses, an improved kind of line generator is proposed. An analysis of wave propagation in a periodic structure together with the numerical solution of the network differential equations shows...
A research type, inert atmosphere vacuum glove box of stainless steel construction is described. The apparatus is suitable for a wide range of chemical and metallurgical applications as well as for physical property measurements on reactive samples. The design features a gas purification and...
Various combinations of noble gases are experimentally investigated to help improve the triggering stability of pulsed ion lasers. The results of these tests show that a 1:1 ratio of Ne☒Ar stabilizes the triggering, but gas separation limits the repetition rate. Tests on He☒Ar show that 15 μ...
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