Discussion of ''two-stream instability in plasma.''
Two stream instabilities in inhomogeneous two fluid plasma as simply growing transverse oscillations stimulated by external radiation sources
Halpern, G.↗
SEARCH · Search NASA
Results for “RADIATION SOURCE”
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.
Time variations in Scorpius X-1 and Cygnus XR-1.
Time variations in X ray fluxes from galactic radiation sources observed in series of balloon flights
Overbeck, J. W.↗
Analysis of night sky emissions according to observations on AES Kosmos-92
Luminescence and radiation sources of night sky emissions
Krasnopolskiy, V. A.↗
The Small Astronomy Satellite /SAS/ program
NASA Small Astronomy Satellite /SAS/ program for radiation source detection
Townsend, M. R.↗
Infrared emission from a V-shaped metal groove compared with that from a flat surface of the same metal.
Continuous IR radiation source using electrically heated Mo ribbon, comparing emission from V shape and flat portions
Burkhard, D. G.↗
Handbook of Solar Simulation for Thermal Vacuum Testing.
Handbook of solar simulation for thermal vacuum testing, discussing space environment, thermal control coatings, radiation sources, optical components, etc
Arvesen, J.↗
Differential approximation for radiant energy losses in nonequilibrium plasmas.
Differential approximation for radiant energy loss in nonequilibrium plasma generated from truncated Taylor series expansion of radiation source function
Harstad, K. G.↗
Research results from the Radio Astronomy Explorer.
Extraterrestrial sources radiation including galactic, solar and magnetospheric radio emissions observed by RAE-I satellite at long wavelengths
Stone, R. G.↗
The infrared-galaxy phenomenon
IR radiation sources /irtrons/ accounting for energy releases by continuous matter and antimatter creation
Low, F. J.↗
Infrared observations of the nebula K3-50
Nebula K3-50 IR radiation source observation, noting energy distribution resembling NGC 7027 and W51-IRS 2
Garmire, G.↗
Penetrating radiation system for detecting the amount of liquid in a tank Patent
Radiation source and detection system for measuring amount of liquid inside tanks independently of liquid configuration
Kaminskas, R. A.↗
Pulsars and the origin of cosmic rays
Galactic origin of pulsars and cosmic radiation sources
Ramaty, R.↗
Cosmic X-ray line emission
Statistical analysis of X ray line emission from cosmic radiation source
Holt, S. S.↗
Pulsars and very high-energy cosmic-ray electrons
Pulsars relationship to very high energy cosmic ray electron propagation, examining far IR background and radiation sources
Shen, C. S.↗
Extraterrestrial Lyman alpha
Extraterrestrial Lyman alpha radiation source attributed to solar Lyman alpha scattering on cold interplanetary hydrogen penetrating to inner solar system
Tinsley, B. A.↗
FASTER 3: A generalized-geometry Monte Carlo computer program for the transport of neutrons and gamma rays. Volume 1: Summary report
The theory used in FASTER-III, a Monte Carlo computer program for the transport of neutrons and gamma rays in complex geometries, is outlined. The program includes the treatment of geometric regions bounded by quadratic and quadric surfaces with multiple radiation sources which have specified space, angle, and energy dependence. The program calculates, using importance sampling, the resulting number and energy fluxes at specified point, surface, and volume detectors. It can also calculate minimum weight shield configuration meeting a specified dose rate constraint. Results are presented for sample problems involving primary neutron, and primary and secondary photon, transport in a spherical reactor shield configuration.
Jordan, T. M.↗
Shield weight optimization using Monte Carlo transport calculations
Outlines are given of the theory used in FASTER-3 Monte Carlo computer program for the transport of neutrons and gamma rays in complex geometries. The code has the additional capability of calculating the minimum weight layered unit shield configuration which will meet a specified dose rate constraint. It includes the treatment of geometric regions bounded by quadratic and quardric surfaces with multiple radiation sources which have a specified space, angle, and energy dependence. The program calculates, using importance sampling, the resulting number and energy fluxes at specified point, surface, and volume detectors. Results are presented for sample problems involving primary neutron and both primary and secondary photon transport in a spherical reactor shield configuration. These results include the optimization of the shield configuration.
Jordan, T. M.↗
Control of an artificial infrared environment to simulate complex, time varying orbital conditions
A computer-controlled infrared simulation system has recently been developed for thermal vacuum ground testing of spacecraft in the Space Environment Simulation Laboratory of the NASA Manned Spacecraft Center. The system can simultaneously follow as many as 30 separate time-varying intensity profiles for irradiation of different areas of a test spacecraft, producing an environment that more closely resembles the changing conditions experienced by an orbiting spacecraft. A description of the hardware is included, but emphasis is placed upon computer techniques that have been developed to maximize the capabilities of the control system within the constraints imposed by a limited computer capability. Among the topics discussed are open-loop control, closed-loop control, manual alteration of profiles, compensation for slow response of the radiation source, and compensation for interacting control zones. Examples of typical results obtained using the control system are also presented.
Dewey, R. L.↗