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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Glass formulation has high coefficient of thermal expansion
Glass formulation has a high coefficient of thermal expansion. The glass makes a good hermetic seal for the end of a stainless steel or copper tube such as a sheath of an instrumentation cable.
Improved atmospheric particle analyzer
Nephelometer measures aerosol particles in wide concentration and size distribution ranges. It measures the light scattered from the aerosol particles at a controlled sampling rate to ensure laminar flow through the sample tube, and thereby eliminate the need for sheath air.
Metal flame spray coating protects electrical cables in extreme environment
Metal flame spray coating prevents EMF measurement error in sheathed instrumentation cables which are externally attached to cylinders which were cooled on the inside, but exposed to gamma radiation on the outside. The coating provides a thermoconductive path for radiation induced high temperatures within the cables.
Protected, high-temperature connecting cable
Ceramic insulated, swaged stainless steel, sheathed, protective atmosphere cable admits electrical leads into an 1800 deg F air-environment test chamber. The cable has some bending capability and provides for nine niobium alloy conductors. An argon purge during the TIG weld closure protects internal wires from oxidation and embrittlement.
Tungsten-rhenium alloy thermocouples effective for high-temperature measurement
Tungsten-rhenium alloy thermocouples, specifically, insulated, sheathed W/W plus 26Re and W plus 5 Re/W plus 26 Re thermocouples, are effective for temperature measurement in excess of 2920 degrees C. These thermocouples have a high thermoelectric output and excellent relationship to temperatures up to 2760 degrees C.
Design concept for nonarcing electrical connector
Connector plug automatically minimizes arcing during mating and demating. This plug uses a high-resistivity outer sheath as an extension to the regular pin contact. It is used in atmospheres containing explosive gases, and reduces erosion at the contact surfaces where mating and demating are performed frequently.
Admittance of the infinite cylindrical antenna in a lossy plasma. 3 - The compressible, magnetoplasma
Plasma compressibility, plasma anisotropy, and vacuum sheath effects on antenna admittance in ionosphere
Impedance of plasma coated axial slot antenna
Plasma sheath effect on reentry communication system with slot antennas
Some interactions of polycrystalline tungsten electrodes with cesium plasmas
Dependence of tungsten electrode work functions on positive ion sheaths between electrodes and cesium plasmas
Direct radiation effects on thermocouples.
Direct nuclear reactor radiation exposure effects on sheathed Chromel-Alumel and iron-Constantan thermocouples
Theoretical and experimental study of a finite cylindrical antenna in a plasma column.
Near field characteristics of finite cylindrical antenna enclosed by long plasma sheath column, solving integral equations determining current distribution
An end effect associated with cylindrical Langmuir probes moving at satellite velocities.
Volt-ampere characteristic anomaly observed in cylindrical Langmuir probe on Explorer 17 satellite, discussing applications to plasma sheath, ion temperature and mass distribution
Normal modes of a nonuniform plasma.
Driven oscillations of electron plasma with sheath described by driven normal mode model
Oscillations at the anode of alkali-vapor arc plasmas.
Alkali vapor arc plasma oscillations in neighborhood of anode, developing theory of anode sheath
Ultrasonic measurement of core material temperature, phase 2
Sheaths for pulse-echo ultrasonic temperature sensor
Infinite cylindrical antenna in a uniaxial compressible plasma.
Numerical values for cylindrical antenna admittance in uniaxial plasma, considering plasma compressibility and vacuum sheath
Reflections of electron beams in thermionic diodes.
Backscattering due to collisions for electrons from emitter accelerated through positive ion sheath into plasma in thermionic diodes