NASA Scientific and Technical Aerospace Reports

electrons up to 2 MeV, floating potentials to 12 kV have been measured, with breakdown and breakdown recovery detected.
Various laboratory measurement examples will be presented.
Author
Electrostatic Probes; Monitors; Electric Charge; Dielectrics; Electrical Faults; Floating; Embedding; Piezoelectric Motors
20040111113
Degradation of High Voltage Solar Array Due to Arching in LEO Plasma Environment
Okumura, Teppei; Hosoda, Satoshi; Toyoda, Kazuhiro; Cho, Mengu; 8th Spacecraft Charging Technology Conference; March
2004; 13 pp.; In English; See also 20040111031; No Copyright; Avail: CASI; A03, Hardcopy
A degradation test for a solar array coupon against ESD was performed under simulated Low Earth Orbit environment.
All tests were performed in a vacuum chamber with a plasma source. A test coupon was biased at -400V with the aim of
developing the next generation 400V high voltage solar array. The LCR circuit was used in order to simulate the arc current
that flows by gathering the charge stored on coverglasses. Tests were repeated until the solar array coupon was damaged. The
arc locations and waveforms of both current and voltage were detected for all the arcs during the tests. The electrical
performance of the coupon was measured after every test without opening the vacuum chamber. Many arcs occurred and
caused the cell degradation. The cell was damaged by only one arc that occurred at the edge of cell, not at electrodes.
Author
Degradation; Solar Arrays; Low Earth Orbits; Earth Orbital Environments; Performance Tests; Electrical Properties; High
Voltages
20040111140 Lockheed Martin Corp., Syracuse, NY, USA
Generation of Compositionally Graded Ga(1-x)In(x)Sb Seed by Solute Diffusion
Dutta, P. S.; Rajagopalan, G.; Gutmann, R. J.; Nichols, G.; Aug. 2002; 16 pp.; In English
Report No.(s): DE2004-821859; LM-02K070; No Copyright; Avail: Department of Energy Information Bridge
Compositionally graded single crystalline seed of Ga(sub 1-x)In(sub x)Sb has been grown in a single experiment
using a solute diffusion method. The present technique is simple and less time consuming compared to the conventional
boot-strapping approach previously used for generating ternary seeds. Starting from an InSb single crystalline seed, a
seed of Ga(sub 0.6)In(sub 0.4)Sb has been grown. The effect of temperature gradient on the crystalline quality of seeds grown
using this method has been discussed.
NTIS
Crystal Growth; Single Crystals; Temperature Effects; Crystallinity
20040111193 Building and Construction Research TNO, Delft, Netherlands
Power Management
vanVugt, J.; August 28, 2003; 62 pp.; In English
Contract(s)/Grant(s): A99/KM/140/13630; TNO Proj. 006.28131/01.01
Report No.(s): Rept-2002-CMC-R013; Copyright; Avail: Other Sources
This report describes a power management simulation tool for electrical installations in an all-electric ship under various
conditions like component failure, electric faults or physical damage. The simulation programme PROGRESS does the
simulation of the damage. The programme General Energy Systems (GES) simulates the electrical installation and the power
management controller. Both programs have been developed by TNO for the Royal Netherlands Navy. For this project an
interface has been written for exchange of data between the programs.
Author
Ships; Computerized Simulation; Installing; Electric Power; Power; Control Equipment
20040111450 Strategic Analysis, Inc., San Clemente, CA
Introduction - MEMS Aerospace Applications
Schadow, Klaus C.; Feb. 2004; 28 pp.; In English; Original contains color illustrations
Report No.(s): AD-A425326; No Copyright; Avail: CASI; A03, Hardcopy
No abstract available
Aerospace Engineering; Microelectromechanical Systems
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