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A technique is described for the electrical discharge machining of prolate spheroid specimens from metallic rods using conventionally milled electrodes. Specimens of Nb, Ta, Re, and Nb☒Ta alloys have been satisfactorily prepared. For single crystals of Nb, x‐ray studies indicate the absence...
An apparatus for high pressure microwave experiments has been developed which can be operated at pressures up to 2 kilobars at 4.2 K using helium as the pressure transmitting medium. The high pressure chamber contains a rutile microwave resonator oscillating at ∼35 GHz. Microwave radiation is...
The methods used to measure response and performances of an electrostatic spectrometer with an identical apparatus are studied in the case of the 127° cylindrical spectrometer by means of a method of calculation of the electron energy distribution. The distribution given by the monochromator is...
The sensitivity of an end‐on detection technique used to monitor light emission behind reflected shock waves is described. Using this detection method, emission from a test gas heated by a reflected shock wave is monitored through an observation window mounted in the end wall of the shock tube....
A new apparatus is described whose purpose is the study of ion‐atom excitation processes. A single photon emitted by the excited target atom is detected in coincidence with the ion scattered at a given angle. Preliminary results are given for the He + ☒He collision at 300 eV and scattering...
An apparatus is described in which solid samples of reactive materials are quenched following heating in a small drop‐away vacuum furnace chamber. The principal feature is that the furnace is supported by the differential pressure between the furnace chamber and its surroundings. Thus, when the...
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