Topics: inductance, Electricity and magnetism, fields and charged particles
485
485
Feb 8, 2011
02/11
by
NASA; Langley Research Center
movies
eye 485
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What is the Aurora Borealis?
Topics: NASA, KSNN, Solar Wind, Charged Particles, Gas, Television, TV
358
358
texts
eye 358
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comment 0
No Abstract Available
Topics: CORPUSCULAR RADIATION, TERRESTRIAL RADIATION, CHARGED PARTICLES, COSMIC RAYS, GEOMAGNETISM
This is the Bureau of Standards reprint of a paper already abstracted together with a section dealing with the behaviour of the Weston cell with rapid temperature changes. In most cases the cells practically attained their normal values within 5 hours after an abrupt change of temperature of over 20 degrees C.
Topics: primary cells, Electricity and magnetism, fields and charged particles
401
401
Feb 8, 2011
02/11
by
NASA; Langley Research Center
movies
eye 401
favorite 0
comment 0
What is the Aurora Borealis?
Topics: NASA, KSNN, Solar Wind, Charged Particles, Gas, Television, TV
385
385
Mar 4, 2009
03/09
by
NASA LaRC Office of Education
movies
eye 385
favorite 0
comment 0
What is the Aurora Borealis?
Topics: William Jeffries, Solar Wind, Charged Particles, Gas, Television, TV
Source: http://nasa.ibiblio.org/details.php?videoid=6250&start=100&subject=Science
Gives details of the principles involved in the selection and definition of the fundamental electrical units for international adoption. The author considers that the choice of fundamental units depends on (1) accuracy of reproduction from specification, (2) concreteness, (3) ease of reproduction. The standard cell is given preference over the silver voltameter.
Topics: electricity and magnetism, Electricity and magnetism, fields and charged particles
217
217
Jul 5, 2010
07/10
by
Barabashov, N. P
texts
eye 217
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comment 0
No Abstract Available
Topics: MAGNETIC FIELDS, PARTICLE DIFFUSION, PLASMA INTERACTIONS, CHARGED PARTICLES, PLASMA HEATING
297
297
Jul 11, 2010
07/10
by
Macdougall, D.; Hutcheon, I. D.; Price, P. B
texts
eye 297
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No Abstract Available
Topics: NUCLEI (NUCLEAR PHYSICS), SPARK CHAMBERS, AEROSPACE SCIENCES, CHARGED PARTICLES, VIBRATION
In studying the interaction of dual-charged particles (particles with both electric and magnetic charge) , the introduction of a two-dimensional charge space results in a set of dynamical equations governing the behavior of the system that are invariant under rotation in charge space. Systems in which all particles have the same magnetic to electric charge ratio are indistinguishable from conventional electrodynamic systems consisting of ordinary electric charges and electromagnetic fields....
Topics: Physics, Electrodynamic theory, Quantum mechanics, Magnetic monopole, Dual-charged particles
Topics: alternating-current research, inductance, Electricity and magnetism, fields and charged particles
20
20
Jun 8, 2020
06/20
by
Morgan, D. V
texts
eye 20
favorite 2
comment 0
xv, 486 pages : 24 cm
Topics: Particules (Physique nucléaire), Channeling (Physics), Channeling, Canalisation (physique),...
The author first reviews the work dealing with the action of this detector, and then describes experiments made with a view to studying the action of alternating currents of low frequency and to settling some outstanding points which are the subject of controversy. The following appear to be the more important points in the author's summary of conclusions. The detector is capable of detecting a few ten-thousandths of a volt (alternating current of low frequency), and with moderate polarisation...
Topics: oscillations and waves (electric), Electricity and magnetism, fields and charged particles
Topics: oscillations and waves (electric), Electricity and magnetism, fields and charged particles
507
507
Jul 11, 2010
07/10
by
Seydel, E
texts
eye 507
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Equations are given for the critical shear stress on an isotropic rectangular plate and the resulting buckled surface. These equations are solved numerically by using finite trigonometric series as approximations. The results are described and diagrammed, and the closeness of the approximations is analyzed. The method is extended to the case of the orthogonally anisotropic plate.
Topics: EARTH MAGNETOSPHERE, MAGNETIC FIELDS, PARTICLE BEAMS, PLASMA INTERACTIONS, CHARGED PARTICLES,...
214
214
Jun 21, 2010
06/10
by
Ivanov, A. N., et al
texts
eye 214
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comment 0
Interaction of spherical shock waves with bodies
Topics: ELECTRON DENSITY (CONCENTRATION), ELECTRON EMISSION, CHARGED PARTICLES, CONDUCTION ELECTRONS,...
372
372
Jun 20, 2010
06/10
by
Khizhnyak, N. A.; Repalov, N. S.; Sinelnikov, K. D.; Yamnitskiy, V. A.; Zeydlits, P. M., et al
texts
eye 372
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Charged particle motion in magnetic traps of acute geometry
Topics: CHARGED PARTICLES, PARTICLE MOTION, SYMMETRY, TRAPS, CHARGED PARTICLE, MAGNETIC TRAP, PARTICLE...
811
811
Jun 21, 2010
06/10
by
Schramm, W. B
texts
eye 811
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comment 0
Costs and schedules for integral launch and reentry vehicle - Vol. 1, Part B
Topics: PAINTS, SOLAR RADIATION, SPECTRAL REFLECTANCE, TEMPERATURE CONTROL, ABSORPTANCE, CHARGED PARTICLES,...
389
389
May 31, 2011
05/11
by
Ward, Robin A
texts
eye 389
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comment 0
The primary goal of this project was to continue populating the currently existing web site developed in 1998 in conjunction with the NASA Dryden Flight Research Center and California Polytechnic State University, with more mathematics lesson plans and activities that K-12 teachers, students, home-schoolers, and parents could access. All of the activities, while demonstrating some mathematical topic, also showcase the research endeavors of the NASA Dryden Flight Research Center. The website is...
Topics: SOLAR WIND, PLASMA INTERACTIONS, ION CHARGE, IONS, INTERPLANETARY SPACE, CHARGED PARTICLES, CORONAS
Assuming that Saturn has trapped radiation belts similar to those of Earth and Jupiter, it is shown that observations of the radial dependence of the intensities, energy spectra, electron-to-proton intensity ratio, and pitch angle distributions of energetic charged particles trapped outside of Ring A can potentially provide information on the existence of Ring E, on the size distribution of the particulate matter therein, and on the magnitude of the radial diffusion coefficient for energetic...
Topics: DTIC Archive, Thomsen,M F, IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY, *RADIATION BELTS,...
Antiprotons are produced in giant accelerators with typical energies measured in GeV. In the unique LEAR facility of CERN, such antiprotons are decelerated to and cooled at an energy of 5 MeV. The experiments described in this proposal made it possible to slow, store and study antiprotons at dramatically lower energies, 10(exp 10) times lower than ever realized before. Antiprotons from LEAR are slowed to several KeV by sending them through a metal degrader window of a precisely chosen...
Topics: DTIC Archive, Gabrielse, Gerald, HARVARD UNIV CAMBRIDGE MA DEPT OF PHYSICS, *TRAPPING(CHARGED...
370
370
Jun 21, 2010
06/10
by
Hyland, R. E.; Lennon, C. J
texts
eye 370
favorite 1
comment 0
Criticality study of meltdown configurations for nuclear aircraft reactors
Topics: ENERGY LEVELS, PARTICLE PRODUCTION, CHARGED PARTICLES, COSMIC RAYS, HIGH ENERGY INTERACTIONS,...
596
596
Jul 5, 2010
07/10
by
Erdogan, F
texts
eye 596
favorite 0
comment 0
No Abstract Available
Topics: CHARGED PARTICLES, NORTHERN HEMISPHERE, PARTICLE FLUX DENSITY, PARTICLE TELESCOPES, MATHEMATICAL...
439
439
Jun 21, 2010
06/10
by
NON
texts
eye 439
favorite 0
comment 0
System analysis of gelled space storable propellants
Topics: EARTH IONOSPHERE, SOLAR CORPUSCULAR RADIATION, ABSORPTION SPECTRA, CHARGED PARTICLES, CHEMICAL...
171
171
Jun 27, 2010
06/10
by
Fenain, M
texts
eye 171
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comment 0
No Abstract Available
Topics: COSMOS SATELLITES, INTERPLANETARY SPACE, RADIATION MEASUREMENT, ROCKET FLIGHT, CHARGED PARTICLES,...
In cyclic induction accelerators, the energy of the particles increases slowly in synchronism with the vertical (betatron) magnetic field. As a consequence of the slow acceleration, the charged particles must be confined by the weak focusing magnetic field over long periods of time, and thus field errors, instabilities and radiation losses can impose limitations on the acceleration process. These limitations can be substantially relaxed if the acceleration were to occur rapidly, say over a few...
Topics: DTIC Archive, Sprangle,P, NAVAL RESEARCH LAB WASHINGTON DC, *PARTICLE ACCELERATORS, MAGNETIC...
In magnetic measurements made at the Bureau of Standards it has been found that the heating effect of the current, employed to produce fields of 100 to 300 gauss, changes appreciably the value of the induction for a given field. The usual practice, when an accuracy of 1 % is desired, has been to immerse the coil in an oil bath maintained at a constant temperature of 25 degrees . The object of the present investigation is to determine the magnitude of the temperature effect and to see whether it...
Topics: magnetism, Magnetic properties and materials A4100 Electricity and magnetism, fields and charged...
This report describes R&D to measure and model the near-earth space environment and the effects of the environment on spacecraft in orbit. Data from two Compact Environmental Anomaly Sensors (CEASE) were analyzed to derive flux spectra of energetic particles. Data from CEASE were also used to create maps of proton fluxes in the South Atlantic Anomaly at multiple altitudes between 400 and 1650 km. A new approach to modeling the diffusion of energetic electrons in the radiation belts was...
Topics: DTIC Archive, Metcalf, James, AIR FORCE RESEARCH LAB HANSCOM AFB MA, *HAZARDS, *SPACE ENVIRONMENTS,...
Topics: DTIC Archive, Dubs,Charles W, AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA, *CHARGED PARTICLES,...
This report is a tutorial covering the energetic charged particle environment in the earth's magnetosphere. It provides an overview of trapped particle morphology, the geometry of the trapping regions, the radiation environmental models, the current status of these models, and future modelling requirements. Keywords: Space environment; Van allen belts; Magnetosphere; Trapped radiation. (jhd)
Topics: DTIC Archive, Vampola, A L, AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB, *MAGNETOSPHERE, *VAN...
491
491
May 31, 2011
05/11
by
Biegel, Bryan A.; Osman, Mohamed A.; Yu, Zhipin
texts
eye 491
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comment 0
We use numerical simulation to investigate the high-temperature (up to 500K) operation of SOI MOSFETs with Aluminum-Nitride (AIN) buried insulators, rather than the conventional silicon-dioxide (SiO2). Because the thermal conductivity of AIN is about 100 times that of SiO2, AIN SOI should greatly reduce the often severe self-heating problem of conventional SOI, making SOI potentially suitable for high-temperature applications. A detailed electrothermal transport model is used in the...
Topics: CHARGED PARTICLES, PARTICLE TRAJECTORIES, PARTICLE MOTION, COMPUTER PROGRAMS, GEOMAGNETISM,...
220
220
Jul 5, 2010
07/10
by
Blamont, J. E., et al
texts
eye 220
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comment 0
No Abstract Available
Topics: CHARGED PARTICLES, DRIFT RATE, FLOW STABILITY, IONOSPHERIC F-SCATTER PROPAGATION, ATMOSPHERIC...
335
335
Jul 23, 2010
07/10
by
Skanavi, G. I
texts
eye 335
favorite 0
comment 0
No Abstract Available
Topics: DECIMETER WAVES, TRIODES, ELECTRIC DISCHARGES, GASES, HIGH FREQUENCIES, AIR, ARGON, CHARGED...
This report reviews the status of radiation-belt science at the close of the data-acquisition phase (1976-79) of the International Magnetospheric Study (IMS). The purpose is to place recent discoveries in context with respect to long-standing problems, and to indicate possible directions for future research in radiation-belt physics. The review includes a synopsis of results achieved on topics related to the source, energization, transport, and loss processes that affect geomagnetically trapped...
Topics: DTIC Archive, Schulz,M, AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB, *MAGNETOSPHERE,...
This report constitutes a review of recent progress in the study of charged-particle access, transport, and loss with respect to the earth's magnetosphere. A major objective of studying particle access is to identify the sources of trapped and quasi-trapped radiation. Important progress in this area involves the measurement of comparative ionic abundances in the radiation belts. The historic problem of accounting for cosmic-ray cut-off latitudes as a function of particle energy is being solved...
Topics: DTIC Archive, Schulz,Michael, AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB, *CHARGED PARTICLES,...
496
496
Jul 21, 2010
07/10
by
Butler, T. G.; Strang, R. F.; Purves, L. R.; Hershfeld, D. J
texts
eye 496
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A theory was developed to compare vibration modes obtained by NASTRAN analysis with those obtained experimentally. Because many more analytical modes can be obtained than experimental modes, the analytical set was treated as expansion functions for putting both sources in comparative form. The dimensional symmetry was developed for three general cases: nonsymmetric whole model compared with a nonsymmetric whole structural test, symmetric analytical portion compared with a symmetric experimental...
Topics: DUST, ELECTROSTATICS, MODELS, PLASMAS (PHYSICS), CHARGED PARTICLES, DEBYE LENGTH, ELECTRON DENSITY...
454
454
Jul 12, 2010
07/10
by
Brun, R. J.; Lewis, W.; Perkins, P. L.; Serafin, J. S
texts
eye 454
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No Abstract Available
Topics: CHARGED PARTICLES, CONFERENCES, OPTICAL EQUIPMENT, RADIATION EFFECTS, MICROELECTRONICS,...
977
977
Jul 21, 2010
07/10
by
NON
texts
eye 977
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This NASA Conference Publication contains the proceedings of the Workshop on Solar High-Resolution Astrophysics Using the Pinhole/Occulter Facility held at NASA Marshall Space Flight Center, Alabama, on May 8 to 10, 1985. These proceedings include primarily the invited tutorial papers, extended abstracts of contributed poster papers, and summaries of subpanel (X-Ray and Coronal Physics) discussions. Both observational and theoretical results are presented. Although the emphasis of the Workshop...
Topics: CHARGED PARTICLES, DUST, INTERSTELLAR MATTER, MOLECULAR EXCITATION, COLLISION PARAMETERS, INFRARED...
341
341
Jul 23, 2010
07/10
by
Cyr, Kelley J
texts
eye 341
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A forecast of the total NASA budget required to achieve a manned mission to Mars at around the end of this century is described. A methodology is presented for projecting the major components of the NASA budget, including the NASA base, space flight, space station, Shuttle Derived Launch Vehicle, and the Manned Mars Mission. The NASA base, including administrative expenses, construction of facilities and research and development other than manned flight, is assumed to level off at the present...
Topics: CHARGED PARTICLES, THRESHOLD DETECTORS (DOSIMETERS), MONOMERS, RADIATION DETECTORS, SENSITIVITY,...
Topics: DTIC Archive, LIBRARY OF CONGRESS WASHINGTON DC AEROSPACE INFORMATION DIV, *CHARGED PARTICLES,...
189
189
Jun 1, 2010
06/10
by
Gringauz, K. I
texts
eye 189
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Charged particle trap experiments on U.S.S.R. COSMIC rockets for investigation of ionized gas in surrounding interplanetary space
Topics: CHARGED PARTICLES, INTERPLANETARY SPACE, IONIZED GASES, TRAPS, U.S.S.R., CHARGED PARTICLE,...
An airflow through a tube is used to guide a charged particle through the tube. A detector may be used to detect charge passing through the tube on the particle. The movement of the particle through the tube may be used to both detect its charge and size.
Topics: NASA Technical Reports Server (NTRS), AIR FLOW, CHARGED PARTICLES, SPECTROMETERS, PATENTS,...
We have performed a series of experiments to study the damping effect of the ion acoustic waves. The experimental results have been analyzed both qualitatively and quantitatively based on the theory by Basu and Jasperse. The analysis shows that the theoretical and experimental results agree very well under certain conditions.
Topics: DTIC Archive, Chan, Chung, NORTHEASTERN UNIV BOSTON MA DEPT OF ELECTRICAL ENGINEERING, *LINEAR...
153
153
Jul 6, 2010
07/10
by
BURRAND, A
texts
eye 153
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THE STOL-TYPE AIRCRAFT LIFT AUGMENTING REQUIRES THE USE OF VERY EFFICIENT DEVICES WHICH, HOWEVER, ARE LIKELY TO BE SOURCES OF NOISE THEMSELVES OR MAY MODIFY THE NOISE GENERATED BY THE JET-ENGINES. AMONG THESE DEVICES IS THE INTERNAL-FLOW JET AUGMENTED FLAP WHEREIN A JET FROM AUXILIARY GENERATORS IS DIRECTED ONTO THE WING FLAP UPPER-SURFACE. THE NOISE OF THIS DEVICE IS TO BE ADDED TO THAT PRODUCED BY THE ENGINES. STATIC TESTS RECENTLY PERFORMED IN AN ANECHOIC CHAMBER HAVE MADE IT POSSIBLE TO...
Topics: RADIO EMISSION, SCORPIUS CONSTELLATION, X RAYS, BREMSSTRAHLUNG, CHARGED PARTICLES, MAGNETIC FIELDS,...
One method of controlling electromagnetic plasma interaction is by seeding the plasma with highly charged particles to obtain relatively large values of the collision frequency. This report contains a description of the maximum obtainable collision frequency as a function of ultrafine charged particle seeding parameters.
Topics: DTIC Archive, MITRE CORP BEDFORD MA, *CHARGED PARTICLES, *PLASMAS(PHYSICS), DENSITY,...
The Kennedy Space Center (KSC) Electrostatics and Surface Physics Laboratory is participating in an Innovative Partnership Program (IPP) project with an industry partner to modify a commercial off-the-shelf simulation software product to treat the electrodynamics of particulate systems. Discrete element modeling (DEM) is a numerical technique that can track the dynamics of particle systems. This technique, which was introduced in 1979 for analysis of rock mechanics, was recently refined to...
Topics: NASA Technical Reports Server (NTRS), COMPUTERIZED SIMULATION, ELECTROSTATICS, CHARGED PARTICLES,...
Optical trapping forces depend on the difference between the trap wavelength and the extinction resonances of trapped particles. This leads to a wavelength-dependent trapping force, which should allow for the optimization of optical tweezers systems, simply by choosing the best trapping wavelength for a given application. Here we present an optical tweezer system with wavelength tunability, for the study of resonance effects. With this system, the optical trap stiffness is measured for single...
Topics: DTIC Archive, APPALACHIAN STATE UNIV BOONE NC, *OPTICAL PROPERTIES, *TRAPPING(CHARGED PARTICLES),...
138
138
May 22, 2011
05/11
by
Loomis, Jack M.; Hebert, C.; Cicinelli, J. G
texts
eye 138
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We describe a virtual sound display built around a 12 MHz 80286 microcomputer and special purpose analog hardware. The display implements most of the primary cues for sound localization in the ear-level plane. Static information about direction is conveyed by interaural time differences and, for frequencies above 1800 Hz, by head sound shadow (interaural intensity differences) and pinna sound shadow. Static information about distance is conveyed by variation in sound pressure (first power law)...
Topics: CHARGED PARTICLES, MATHEMATICAL MODELS, PARTICLE BEAMS, RELATIVISTIC PARTICLES, WAVE FUNCTIONS,...
342
342
Jul 11, 2010
07/10
by
Beasley, W. D.; Mcghee, R. J
texts
eye 342
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Low-speed wind-tunnel tests have been conducted to determine the two-dimensional aerodynamic characteristics of the NACA 65 sub 1-213, a = 0.05, airfoil. The results were compared with data from another low-speed wind tunnel and also with theoretical predictions obtained by using a viscous subsonic method. The tests were conducted over a Mach number range from 0.10 to 0.36. Reynolds numbers based on the airfoil chord varied from about 3 million to 23 million.
Topics: CHARGED PARTICLES, COLLISION PARAMETERS, PARTICLE COLLISIONS, PARTICLE THEORY, PARTICLE ENERGY,...
380
380
Jul 12, 2010
07/10
by
Furlong, K. L.; Fearn, R. L
texts
eye 380
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A method is proposed to combine a numerical description of a jet in a crossflow with a lifting surface panel code to calculate the jet/aerodynamic-surface interference effects on a V/STOL aircraft. An iterative technique is suggested that starts with a model for the properties of a jet/flat plate configuration and modifies these properties based on the flow field calculated for the configuration of interest. The method would estimate the pressures, forces, and moments on an aircraft out of...
Topics: CALIBRATING, CHARGED PARTICLES, DEEP SPACE NETWORK, IONOSPHERIC COMPOSITION, IONOSPHERIC ELECTRON...
