A cosmic ray search for fast magnetic charges Progress report
Cerenkov counter telescope for monopoles producing straight lightning strokes
Tompkins, D. R.↗
SEARCH · Engineering Papers
Results for “fast”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Fast multipliers
Parallel multiplier design with carry-save scheme and constructed from series integrated circuits, discussing speed, complexity and cost
Habibi, A.↗
Fast on-line gas chromatograph analysis of H2, O2, and CO2 in the off-gas from a reactor experiment
Hydrogen, oxygen and carbon dioxide in off-gas stream from nuclear reactor experiment using on- line gas chromatography
Power, J. L.↗
Fast Mars communication geometry program
Computer program calculates trajectories of orbiting spacecraft and lander vehicles simultaneously. Using data from both vehicles, program calculates communications geometry which consists of orbiting spacecraft cone/clock angle, lander cone/clock angle, range, range rate and acceleration, and fade, reflective, and system margins.
Garner, W. R.↗
Fast peak selector for mass spectrometer
Analytical tool rapidly determines quantities of up to six preselected molecular species in a gaseous sample. Novel features include - /1/ ability to operate in two modes, /2/ stepping rate of two species per second, and /3/ capability for recording analysis results directly in volume percent.
Pasko, R. M.↗
Design and development of a fast scan infrared detection and measurement instrument
Infrared microscope instrument measures and plots the infrared profile of semiconductor chips, transistors and integrated circuits. Infrared analyses yields information on electrical and physical properties, enabling manufacturing improvements in semiconductor performance and reliability. Operational performance and main sections of the instrument are given.
Dostoomian, A. S.↗
Fast carry accumulator design
Simple iterative accumulator combined with gated-carry, carry-completion detection, and skip-carry circuits produces three accumulators with decreased carry propagation times. Devices are used in machine control, measurement equipment, and computer applications to increase speed of binary addition. NAND gates are used in combining network.
Mastin, W. C.↗
Fast opening diaphragm Patent
Magnetically opened diaphragm design with camera shutter and expansion tube applications
Bengtson, R. D.↗
Materials technology program for a compact fast reactor for space power
Production engineering and compatibility tests of Ta-8W-2Hf clad UN nuclear fuel element for use in lithium cooled space power unit reactors
Gluyas, R. E.↗
Experimental and analytical investigation of fast normal shock position controls for a Mach 2.5 mixed-compression inlet
Normal shock control systems for supersonic mixed compression inlet using feedback loops
Cole, G. L.↗
Fast time resolved spectral analysis of VLF banded emissions
Magnetospheric VLF banded emissions spectral analysis, investigating OGO-5 data by high time resolution spectral techniques
Coroniti, F. V.↗
Reduction of Doppler broadening of spectral lines in fast-beam spectroscopy
Spectral lines Doppler broadening reduction in spectroscopy using foil and gas excited accelerator beams as light sources
Leavitt, J. A.↗
Positive fast sealing union connections
Union connections are designed for connecting high pressure flexible hoses from gas storage manifolds to gas transport trailers. Connection uses O ring seals which can be quickly assembled and disassembled without use of wrenches, and which do not twist hose. Worn or damaged O rings are easily replaced.
Kleber, C. M.↗
Flow tests of a single fuel element coolant channel for a compact fast reactor for space power
Water flow tests were conducted on a single-fuel-element cooling channel for a nuclear concept to be used for space power. The tests established a method for measuring coolant flow rate which is applicable to water flow testing of a complete mockup of the reference reactor. The inlet plenum-to-outlet plenum pressure drop, which approximates the overall core pressure drop, was measured and correlated with flow rate. This information can be used for reactor coolant flow and heat transfer calculations. An analytical study of the flow characteristics was also conducted.
Springborn, R. H.↗
Analysis of loss-of-coolant accident for a fast-spectrum lithium-cooled nuclear reactor for space-power applications
A two-dimensional, transient, heat-transfer analysis was made to determine the temperature response in the core of a conceptual space-power nuclear reactor following a total loss of reactor coolant. With loss of coolant from the reactor, the controlling mode of heat transfer is thermal radiation. In one of the schemes considered for removing decay heat from the core, it was assumed that the 4 pi shield which surrounds the core acts as a constant-temperature sink (temperature, 700 K) for absorption of thermal radiation from the core. Results based on this scheme of heat removal show that melting of fuel in the core is possible only when the emissivity of the heat-radiating surfaces in the core is less than about 0.40. In another scheme for removing the afterheat, the core centerline fuel pin was replaced by a redundant, constant temperature, coolant channel. Based on an emissivity of 0.20 for all material surfaces in the core, the calculated maximum fuel temperature for this scheme of heat removal was 2840 K, or about 90 K less than the melting temperature of the UN fuel.
Turney, G. E.↗
Analysis of dashpot performance for rotating control drums of a lithium cooled fast reactor concept
A dashpot was incorporated in the design of the drive train of the rotating control drum to prevent shock damage to the control drum and drive train at the termination of a scram action. A rotating vane dashpot using reactor coolant lithium as a damping fluid appears to be the best candidate of the various damping devices explored. A performance analysis, results and discussion of vane type dashpots are presented.
Wenzler, C. J.↗
Relative biological effectiveness of fast neutrons compared with X-rays: Prenatal mortality in the mouse
The effects of fission neutrons and of X-rays on the mouse zygote are discussed. Seven-week-old virgin mice were allowed a 12-hour mating opportunity beginning at 7:00 P.M. Between 1:30 and 4:00 P.M., except where indicated otherwise, the females which had mated (vaginal plug) during the night were either irradiated or sham-irradiated. At the time of irradiation the zygotes were in a pronuclear stage. Sixteen days later the mice were killed and the uteri dissected. The number of dead embryos, live embryos, and gross anomalies were determined. Dead embryos were classified as to stage of development.
Friedberg, W.↗
A fast acting electrical servo for the actuation of full span, Fowler-type wing flaps in DLC applications: A detail design study
The philosophy and detail design of an electro-mechanical actuator for Fowler-type wing flaps which have a response time constant of 0.025 seconds are described. A conventional electrical servomotor with a power rating twice the maximum power delivered to the load is employed along with adaptive, gain-scheduled feedback and various logic circuits, including one to remove electrical excitation from the motor during extended periods when no motion of the flap is desired.
Smetana, F. O.↗