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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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Establishing an arc between water-cooled tungsten-tipped electrodes, maintaining the arc along the centerline of a central jet of argon gas, and surrounding the argon jet with a coaxial sheath of nitrogen stabilizes operation of a low-frequency ac electric arc.
RTV silicone is used with a braided wire sheath surrounding the metal bellows in fluid transfer systems. It demonstrated best overall performance in flexibility and shock absorbing tests, high temperature, low temperature, and salt spray.
Mixing and temperature measurements on argon plasma operating as heater for surrounding sheath of air or hydrogen
Water injection from nozzles of RAM C spacecraft models in hypersonic wind tunnels to study ion sheath penetration characteristics of spray
Electrostatic modulator for communicating through plasma sheath formed around spacecraft during reentry
MHD generator cathode current-sheath voltage characteristics for thermionic arc spot emission mode, noting role of cathode temperature
Monograph on ionosphere-satellite interactions, discussing ionosphere layers, plasma sheaths and wakes, electromagnetic wave propagation, spacecraft antennas, etc
Alouette 1 plasma resonance observations, analyzing electron density measurements in sheath region and cyclotron harmonic resonant frequencies
Cylindrical antenna admittance during immersion in ionospheric plasma, noting influence of ion sheath and plasma anisotropy
Steady state potential distributions near photoemitting plate immersed in plasma, noting over-shoot effects role for sheaths around satellites in interplanetary plasma
Quasi-ambipolar diffusion in arc discharges in magnetic field, calculating ions and electrons density distributions between anode and cathode sheaths
Space environment simulation system for measuring spacecraft electric field strength in plasma sheath
VHF and X band telemetry attenuation by plasma sheath around hypersonic reentry vehicles
Slot antenna radiation pattern distortion produced by boundary layer plasma sheath around conical reentry vehicles
Reentry plasma sheath alleviation by injecting sulfur hexafluoride or hydrazine into boundary layer
Improved microwave transmission by adding rapidly evaporating liquid droplets to plasma sheath to remove free electrons
Neutron irradiated and unirradiated Ta sheathed BeO insulated grounded junction thermocouples drift measurement
Motility and pH sensor capsule is developed to monitor gastric acidity, pressure, and temperature. Capsule does not interfere with digestion. Sensor is capsule which includes pH electrode, Pitran pressure transducer, and thermistor temperature sensor all potted in epoxy and enclosed in high density polyethylene sheath.