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Instrumentation for Sensitive Gas Measurements

Measurements are based on cavity-enhanced absorption.

Posted in: Physical Sciences, Briefs

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Apparatus for Testing Flat Specimens of Thermal Insulation

An improved design affords flexibility for testing under diverse conditions.

Posted in: Physical Sciences, Briefs

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Quadrupole Ion Mass Spectrometer for Masses of 2 to 50 Da

H2, He, O2, and Ar can be quantitated at low concentrations in N2.

Posted in: Physical Sciences, Briefs

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Miniature Laser Doppler Velocimeter for Measuring Wall Shear

Interference fringes are configured for sensitivity to a velocity gradient.

Posted in: Physical Sciences, Briefs

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Atom Skimmers and Atom Lasers Utilizing Them

Atom skimmers act as conduits and low-pass velocity filters.

Posted in: Physical Sciences, Briefs

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Gears Based on Carbon Nanotubes

Nanometer size gears could be used in molecular-scale machines.

Posted in: Physical Sciences, Briefs

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Dielectric Heaters for Testing Spacecraft Nuclear Reactors

A document proposes the development of radio-frequency- (RF)-driven dielectric heaters for non-nuclear thermal testing of the cores of nuclear-fission reactors for spacecraft.

Posted in: Test & Measurement, Briefs

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