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An interferometric method for measuring the displacement of diffuse surfaces moving with velocities of a few millimeters per microsecond is presented. The method utilizes the interference between two light beams reflected from a constant area of the moving surface at two different angles. It...
A new experimental method is presented for measuring the thermal conductivity as a function of temperature. The basic innovation lies in extracting from the measured temperature profile of a sample i n v a c u o , the thermal conductivity of each individual cross‐sectional sample element. The...
The paper describes an inductive magnetic transducer for on‐line recording of translations and vibrations. The transducer consists of an iron cored sensor coil and simple accompanying circuitry. The main features which are peculiar to the present transducer are (a) facility for linearizing the...
For the i n s i t u investigation of planetary atmospheres a small Mattauch‐Herzog mass spectrometer has been developed. Its high‐pressure performance has been improved by incorporating differential pumping between the ion source and the analyzing fields, shortening the path‐length as well...
A microcomputer‐based high‐voltage pulse controller was developed for use in Kerr effect studies. The system allows the user to program pulse format and change pulse sequence by a simple entry from a keyboard. A silicon diode temperature probe which is interactive with the microcomputer is...
Circuitry is described which provides increased data throughput by multilevel discrimination for time‐resolved studies employing sampled photon counting. Linearity of response to within 5% for photon acceptance rates at 145% the repetition rate are obtainable.
A common and persistent problem in modern instrumentation is the observation and recording of small signal waveforms that are removed from ground by very high voltages. Examples of this are the instrumentation of neutral particle injectors used in controlled thermonuclear research and the...
A low‐compliance, high‐bandwidth force sensor is described. The bending of a quartz plate is converted to an analog voltage by using a phase‐locked loop to measure the change in frequency of two oscillators inductively coupled to the plate. The resolution of the sensor is approximately 10...
A capillary viscometer is described which adapts a conventional capillary rheometer for use with crosslinking polymers. Illustrative data obtained with the viscometer using diallyl phthalate resin are included.
A durable flame sealed silicon glass infrared cell for use at ultrahigh vacuum (≲4×10 −8 Pa) and temperatures between 77 and 600 K is described. The cell is suitable for thermal infrared as well as MW/cm 2 CO 2 laser pulses of 1 J energy. It can be fused directly onto a glass to stainless...
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