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20040111070 Instituto Superior Tecnico, Lisbon, Portugal Physical Problems of Artificial Magnetospheric Propulsion Mendonca, J. T.; Brinca, A. L.; Fonseca, R.; Loureiro, J.; Silva, L. O.; Vieira, I.; 8th Spacecraft Charging Technology Conference; March 2004; 8 pp.; In English; See also 20040111031 Contract(s)/Grant(s): ESA-ESTEC-16360/02/NL/LvH; No Copyright; Avail: CASI; A02, Hardcopy We discuss here some physical problems related to the recently proposed scheme for solar sailing, using an artificial magnetosphere. We will concentrate on the forces acting on the plasma bubble, and their transfer to the spacecraft. Upper and lower limits of the force acting on the bubble are established. The results of test particle dynamics are presented, concerning the interaction of the solar wind with the modified magnetic dipole resulting from the spacecraft coils and the plasma expansion. Propagation of the forces along the magnetic flux tubes, from the bubble magnetopause down to the spacecraft vicinity, is discussed by using a simple MHD theoretical model. Emphasis is made on the distribution of currents flowing in the immediate vicinity of the spacecraft. Finally, results of PIC code simulations of the magnetized plasma expansion are presented and an overall qualitative picture of the physical processes is given, with a discussion of the strategy for obtaining more quantitative estimates of the magnetospheric propulsion efficiency. Author Solar Sails; Magnetohydrodynamics; Plasma Bubbles; Magnetic Flux; Magnetic Dipoles; Solar Wind 20040111071 Chiba Univ., Chiba, Japan Development of Solar Array for a Wideband Internetworking Satellite: ESD Test Toyoda, Kazuhiro; Matsumoto, Toshiaki; Shikata, Yoshio; Cho, Mengu; Sato, Tetsuo; Nozaki, Yukishige; 8th Spacecraft Charging Technology Conference; March 2004; 15 pp.; In English; See also 20040111031; No Copyright; Avail: CASI; A03, Hardcopy This paper describes the details of ground based ESD test carried out for solar array of Wideband InterNetworking engineering test and Demonstration Satellite (WINDS). An electron beam was used to simulate the inverted potential gradient conditions. The sustained arc was not observed for test coupons with RTV grouting at the inter-string gap and thicker RTV layer between cells and Kapton sheet. Arc pulses short-circuited the PN junction of triple-junction cells once the arcs occurred at the cell edges. Effects of exposing bus bars to space without coating with RTV were also investigated. There was no detrimental effect associated with the exposed bus bars. Author Engineering Test Satellites; Solar Arrays; Electron Beams; Potential Gradients 20040111084 Science Applications International Corp., San Diego, CA, USA Electron Collection by International Space Station Solar Arrays Mandell, M. J.; Davis, V. A.; Gardner, B.; Jongeward, G.; 8th Spacecraft Charging Technology Conference; March 2004; 18 pp.; In English; See also 20040111031; No Copyright; Avail: CASI; A03, Hardcopy A solar array electron collection model was developed in 1991 for Space Station Freedom, for the purpose of determining the maximum current emission required for the hollow cathode plasma contactor to ‘ground’ the station. Now that the International Space Station (ISS) is on orbit and the first pair of solar array wings has been deployed, it has been observed that the electron collection by the solar array cell edges is significantly less than that predicted from preflight test results and the original model. A new model was developed that eliminates snapover and takes proper account of the role of plasma density. The model is validated by integration into Environment WorkBench (EWB), which models the station geometry, current voltage relationships of station elements, point on orbit, plasma environment, v B induced potentials, and attitude and movement of station solar arrays and performs a circuit analysis to compute the floating potential of the station chassis. These results are then compared with string currents (inferred from measurements of plasma contactor emission currents during targeted DTOs) and from measurements of charging by the Floating Potential Probe (FPP). Author Solar Arrays; Space Station Freedom; Electron Bombardment; Electric Potential; Mathematical Models; Plasma Density 20040111086 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, USA Simulations of Solar Wind Plasma Flow Around a Simple Solar Sail Garrett, Henry B.; Wang, Joseph; 8th Spacecraft Charging Technology Conference; March 2004; 15 pp.; In English; See also 20040111031; No Copyright; Avail: CASI; A03, Hardcopy In recent years, a number of solar sail missions of various designs and sizes have been proposed (e.g., Geostorm). Of 325
importance to these missions is the interaction between the ambient solar wind plasma environment and the sail. Assuming a typical 1 AU solar wind environment of 400 km/s velocity, 3.5 cu cm density, ion temperature of approx.10 eV, electron temperature of 40 eV, and an ambient magnetic field strength of 10(exp -4) G, a first order estimate of the plasma interaction with square solar sails on the order of the sizes being considered for a Geostorm mission (50 mx50mand75mx75m corresponding to approx.2 and approx.3 times the Debye length in the plasma) is carried out. First, a crude current balance for the sail surface immersed in the plasma environment and in sunlight was used to estimate the surface potential of the model sails. This gave surface potentials of approx.10 V positive relative to the solar wind plasma. A 3-D, Electrostatic Particle-in-Cell (PIC) code was then used to simulate the solar wind flowing around the solar sail. It is assumed in the code that the solar wind protons can be treated as particles while the electrons follow a Boltzmann distribution. Next, the electric field and particle trajectories are solved self-consistently to give the proton flow field, the electrostatic field around the sail, and the plasma density in 3-D. The model sail was found to be surrounded by a plasma sheath within which the potential is positive compared to the ambient plasma and followed by a separate plasma wake which is negative relative to the plasma. This structure departs dramatically from a negatively charged plate such as might be found in the Earth s ionosphere on the night side where both the plate and its negative wake are contiguous. The implications of these findings are discussed as they apply to the proposed Geostorm solar sail mission. Author Solar Sails; Solar Wind; Space Plasmas; Plasma Interactions; Magnetohydrodynamic Flow; Debye Length 20040111391 Smithsonian Astrophysical Observatory, Cambridge, MA, USA SOHO Ultraviolet Coronagraph Spectrometer (UVCS) Mission Operations and Data Analysis Gurman, Joseph, Technical Monitor; Kohl, John L.; September 2004; 12 pp.; In English Contract(s)/Grant(s): NAG5-12865; No Copyright; Avail: CASI; A03, Hardcopy The scientific goal of UVCS is to obtain detailed empirical descriptions of the extended solar corona as it evolves over the solar cycle and to use these descriptions to identify and understand the physical processes responsible for coronal heating, solar wind acceleration, coronal mass ejections (CMEs), and the phenomena that establish the plasma properties of the solar wind as measured by ‘in situ’ solar wind instruments. This report covers the period from 15 February 2003 to 14 April 2004. During that time, UVCS observations have consisted of three types: 1) standard synoptic observations comprising, primarily, theHILyalpha line profile and the 0 VI 103.2 and 103.7 nm intensity over a range of heights from 1.5 to about 3.0 solar radii and covering 360 degrees about the Sun, 2) sit and stare observations for major flare watches, and 3) special observations designed by the UVCS Lead Observer of the Week for a specific scientific purpose. The special observations are often coordinated with those of other space-based and ground-based instruments and they often are part of SOHO joint observation programs and campaigns. Lead observers have included UVCS Co-Investigators, scientists from the solar physics community and several graduate and undergraduate level students. UVCS has continued to achieve its purpose of using powerful spectroscopic diagnostic techniques to obtain a much more detailed description of coronal structures and dynamic phenomena than existed before the SOHO mission. The new descriptions of coronal mass ejections (CMEs) and coronal structures from UVCS have inspired a large number of theoretical studies aimed at identifying the physical processes responsible for CMEs and solar wind acceleration in coronal holes and streamers. UVCS has proven to be a very stable instrument. Stellar observations have demonstrated its radiometric stability. UVCS has not required any flight software modifications and all mechanisms are operational. The UVCS 0 VI Channel with its redundant optical path for wavelengths near H I Lyalpha is capable of observing the entire UVCS wavelength range. The regions of the detector currently being used require different grating angles for direct OVI observations and redundant path HILyalpha observations, and so those can no longer be observed simultaneously. Since December 1998, the 0 VI Channel has been used for all UVCS observations. Although the H I Lyalpha Channel and detector are still operational, increases in the dark count up to about 5x10(exp 4) counts/sec/pixel and an increase in high voltage current to within a factor of two of the maximum used in the laboratory before flight led to the decision to not use that detector after 1998. The visible light channel functioned nominally during the reporting period. UVCS data, data analysis software, calibration files and the mission log are available from the SOHO archive and SAO. All UVCS data are now available within three months of the observations to scientists and the general public via the SOHO Data Archive and SAO. UVCS has resulted in 33 scientific papers in 2003. There were numerous presentations at scientific meetings. UVCS Education and Public Outreach activities involved nine members of the UVCS team. During the reporting period, there were over a dozen events directed at students and teachers, museum audiences, and public audiences via the mass media, internet and educational literature. Author Coronagraphs; Soho Mission; Ultraviolet Spectrometers; Data Processing; Solar Physics 326
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NASA STI Program ... in Profile Sin
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NASA STI Availability Information N
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Geosciences 42 Geosciences (General
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SCIENTIFIC AND TECHNICAL AEROSPACE
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20040111686 Naval Surface Warfare C
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air transport industry will also ad
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can be a useful tool for gathering
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Aviation related applications that
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An efficient methodology is present
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Fogleman. A document that took a ye
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flux focusing lens is incorporated
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In high speed engines, thorough tur
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09 RESEARCH AND SUPPORT FACILITIES
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(1/inch). The results generated for
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13 ASTRODYNAMICS Includes powered a
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20040120944 NASA Langley Research C
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Orbital debris in tow-Earth orbit r
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the current state of the art in sho
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discharge phenomena were investigat
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sufficiently different from GEO tha
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need and concept of the plasma expe
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20040111087 Science Applications In
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pump. Recall that the prior reporte
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of no penetration as described in S
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presented. Finally, the possible ap
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instrument were developed during th
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20040111432 NASA Glenn Research Cen
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decomposes. This approach is advant
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high surface areas (300-600 m(sup 2
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developed for tow level fiber. Comp
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This paper describes a new approach
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is still important, the industry’
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engines. Epoxy reinforced with brai
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local, intermediate, and long range
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the effect of Cr on SCC. The alloy
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provide data from reference wetland
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nonparametric theory, he was able t
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cooling cycles produced during weld
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20040111168 California Univ., Lawre
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chemical compositional variation, h
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20040120859 Duquesne Univ., Pittsbu
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27 NONMETALLIC MATERIALS Includes p
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20040111196 Institute of Industrial
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The National Aeronautics and Space
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This report summarizes the findings
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esults show that the membranes expo
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development of a new performance-ba
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schedule for testing was developed,
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20040111137 Lawrence Livermore Nati
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20040111497 Military Equipment and
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20040120946 Cleveland State Univ.,
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electrons up to 2 MeV, floating pot
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Army, DARPA, MDA, Navy, NSA, and OS
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During the two-year duration of thi
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the design, operational and perform
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the surfaces can be brought togethe
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self-sustained due to the low Reyno
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slot in an orientation most nearly
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place in practice the formulated fl
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Direct numerical simulation was use
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Because the temperature rise on the
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activities and both funded and non-
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Time Stamping System, The Detection
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and remove self-interference signal
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An optical detector system includes
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proliferative response of corneal t
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The use of wind power is in a perio
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In this report the implementation o
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weapons systems. For reasons arisin
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for the largest term in the series.
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20040111153 BP Solar, Frederick, MD
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20040112060 National Space Science
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predicted for Alloy 22, and validat
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pollution influence exceeds Europea
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20040120889 Alternative Modes as an
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considers the environment of the wh
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GEOS-CHEM global three-dimensional
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Our project focused on the investig
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(FL-1016) (Salottolo 1994; Phillips
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20040111442 Harvard Univ., Cambridg
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20040120899 Geological Survey, Aust
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20040111443 National Space Science
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20040111528 Johns Hopkins Univ., Ba
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20040111546 Texas Univ., Houston, T
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20040111555 Baylor Coll. of Medicin
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20040111561 McMaster Univ., Hamilto
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Some cellular factors that contribu
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in commercially available seaweeds
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20040111584 State Univ. of New York
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to a topic in or immediately applic
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strengthens our central hypothesis
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20040111604 Winston-Salem State Uni
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The objective of this proposal is t
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20040111622 Texas Univ., Houston, T
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ole of CE-Q in initiation of prosta
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20040111633 Jackson (Henry M.) Foun
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that are required for DNA replicati
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20040111649 Monash Univ., Clayton S
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20040111658 Henry Ford Health Syste
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and loss of heterozygosity occurs i
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esistance is frequent, perhaps exce
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20040111682 Burnham Inst., La Jolla
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educators, researchers and professo
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several similar genetic epidemiolog
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Using a Resource-Based Theory/View
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20040111717 Beth Israel Deaconess M
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Evidence show that TNFa is able to
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observations that cells expressing
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Early detection and intervention is
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Metastasis-suppressor genes suppres
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The objective was to produce breast
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generally convex back surface, and
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A method is presented for determini
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20040121111 Florida International U
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of V and V and UQ at specified Conf
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60 COMPUTER OPERATIONS AND HARDWARE
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holdings. A study released by the S
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version compatibly issues surfacing
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archive sets, application modules,
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20040111441 Prins Maurits Lab. TNO,
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20040111488 Industrieanlagen-Betrie
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20040111687 Naval Research Lab., Wa
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Mass Storage Systems and Technologi
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the information exchange at the int
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20040121022 COPAN Systems, Inc., Lo
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Performance has always come at a st
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clusters with usually small IT budg
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20040121049 Singapore Univ., Singap
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This paper presents a dynamic techn
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Collaborative optimization is a des
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implemented within the OPTO-22 fram
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20040111478 Cornell Univ., Ithaca,
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An approach of dealing with cases w
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distribution of ions) with given in
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Page 336 and 337: 99 GENERAL Includes aeronautical, a
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Page 342 and 343: ARTIFICIAL INTELLIGENCE A Concurren
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Page 348 and 349: CERAMIC FIBERS Ceramic Matrix Compo
Page 350 and 351: COMMAND AND CONTROL An Enemy within
Page 352 and 353: COMPUTERIZED SIMULATION AF-Geospace
Page 354 and 355: CRACK PROPAGATION A Comparison of W
Page 356 and 357: DEACTIVATION Inactivation of FGF Re
Page 358 and 359: Metamorphosis of a Hairpin Vortex i
Page 360 and 361: ELASTIC PROPERTIES Characterization
Page 362 and 363: EMISSION Effects of Large-Amplitude
Page 364 and 365: Mechanical Behaviour of Woven Graph
Page 366 and 367: FOREIGN BODIES Foreign Object Damag
Page 368 and 369: GRAIN SIZE High Pressure X-Ray Diff
Page 370 and 371: Autocine and Paracrine Control of B
Page 372 and 373: INDEPENDENT VARIABLES Linear Least
Page 374 and 375: Identification of Novel Genes Affec
Page 376 and 377: LOW TEMPERATURE ENVIRONMENTS Oxygen
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Robotics: Military Applications for
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NEURONS The Impact of Exercise on t
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ORDNANCE Standardized UXO Technolog
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PHASE SHIFT Detection of a PSK Sign
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POLYMERIC FILMS Clear, Conductive,
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Cost-Effective Remote Mirroring Usi
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REGENERATORS Overview 2003 of NASA
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SEALS (STOPPERS) Compliant Foil Sea
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SCDM in a Distributed Environment -
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Modeling of the Plasma Thruster Imp
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Implementation of Higher Order Lami
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Laser Velocimetry: The Elusive Thir
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THORIUM Evaluation of Thorium-232 D
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TURBULENCE MODELS A Variable Turbul
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WAFERS Wafer-Bonded Internal Back-S
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Abbenhuis, Oscar Simulation Interop
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Barrie, R. L. Stress Relaxation in
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Boykett, P. H. Fatigue Life Estimat
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Carter, Theresa Strategic Supply -
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Validation of NASCAP-2K Spacecraft-
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Dichtl, Rudy Challenges in Long-Ter
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Fattah, Nabil Abdel Developing Pass
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Galofaro, J. T. Solar Array Arcing
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Gundlach, R. B. Development of a Ca
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Holdsworth, David Long-Term Steward
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Janic, Milan An Application of the
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Kitchenka, Julie A. Feasibility and
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Lee, Rei GUPFS: The Global Unified
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Mahler, Ronald P. Unified Collectio
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Mikellides, I. G. Assessment of Hig
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Namkung, Min Classification of Magn
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Oun, Tae Hoon An Air Cargo Transshi
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Polomarov, O. V. Landau Damping and
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Ross, P. N. Atomistic Simulations o
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Shamma, Mohammed A. Application of
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Starr, Brett R. Aerocapture Perform
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Modeling of the Photoelectron Sheat
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Plasma Interactions With a Negative
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Williams, M. F. Sludge Batch 3 Simu
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Zhou, Feng A Design of Metadata Ser
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