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``Low energy'' as used in this report means ionic and atomic beam velocities from approximately 5×10 7 to 2×10 8 cm∕sec. In this velocity region an ion beam brought to charge equilibrium in helium gas has a much greater content of components of high positive charge than does the same beam...
A transistorized time‐to‐pulse‐height converter is described which has a timebase range of 0 to 15 nsec, and a stability of 10 −10 sec. The circuit has been used for the mass analysis of particle beams by time‐of‐flight. Time resolutions of 10 −9 sec were obtained using conventional...
The Dauphinee and Mooser circuit Rev. Sci. Instr. 26 , 660 (1955) for the measurement of resistivity and the Hall effect is liable to certain systematic errors due to capacitive effects in the switches. The magnitude of these errors is estimated, and it is shown how they may be eliminated by the...
Extensively increasing adaptation and use of radioactive isotopes for in vivo studies of the circulatory system has dictated improvement in the electronic instrumentation necessary to detect and measure progress of the isotope through the system. Inasmuch as the time intervals of circulatory...
Apparatus has been developed for the measurement of shortening and tension of isolated muscle using variable capacitance methods. An isotonic transducer is described which will measure up to 2.5 cm of shortening with a minimum of inertial loading with 1% linearity. An isometric transducer is...
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