| Improve Efficiency of a FMS (Flexible Manufacturing System) Cell Through Use of a Computer Simulation Model. |
NOV 1989 |
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| Authors:
D. C. Musil; K. S. Akbay
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 | The purpose of this study is to demonstrate the use of computer simulation modeling as a tool to improve the efficiency of a flexible manufacturing cell. (Copyright Institute of Industrial Engineers, 25 Technology Park/Atlanta, Norcross GA 30092). |
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| Where's the Business? |
NOV 1989 |
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| Authors:
R. Diesslin; F. O'Connor
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| Contract shops have their own very special needs since they provide a service rather than market a product. Therefore, a computer database for job shops has some unique requirements. This article discusses some basic concepts about databases, current practices for quoting and order processing, and general techniques for implementing the system as a whole. It also covers what a database is and the benefits of using a database. (Copyright 1989 ... |
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| CAM (Computer Aided Manufacturing) Shapes A Shop From the Start. |
NOV 1989 |
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| Authors:
M. Albert
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| Two of the most urgent issues in CAD/CAM right now are exchanging data between systems and NC programming of complex surfaces. Here is how one shop built its business around doing both with a personal computer-based CAM system. (Copyright 1989 by Modern Machine Shop). |
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| An Evaluation of a Space Flight Test of Hardened Solar Array Technology. |
MAR 1974 |
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| Authors:
John M. Green; AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OH
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| On 2 September 1972, the Navy launched a navigational satellite of the Transit series. This satellite, which was called TRIAD during its development, has a radioisotope thermal generator (RTG) for its main power source; however, it has an auxiliary power source consisting of four experimental hardened solar panel segments. Another one of the experiments on board the spacecraft is a set of six solar cell modules designated the Environmental Survey ... |
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| Gallium-Arsenide Photoelectric Receiving Devices, |
13 FEB 1970 |
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| Authors:
Michal Korwin-Pawlowski; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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| A review of the state of the art in galium arsenide photoelectric devices for radiation detection and energy conversion is made, based on recent foreign publications. The construction, fabrication techniques and pro perties of various kinds of photoresistors, photodiodes and solar cells made of GaAs are described. (Author) |
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| Improved CdTe Solar Cell and Array Environmental Effects Investigation. |
DEC 1968 |
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| Authors:
R. W. Aldrich; R. J. DeNeve; GENERAL ELECTRIC CO SYRACUSE NY SEMICONDUCTOR PRODUCTS DEPT
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| Several alternative photovoltaic junctions were examined during the quarter. Included were homojunctions formed both by diffusion and by a spraying technique and two kinds of Schottky barriers. Of these, the most successful has been the gold: CdTe barriers which have exhibited currents equal to those of our standard Cu2Te: CdTe heterojunction and substantial improvements in output voltage. Stability tests to date indicate that there are two types of Cu2Te: CdTe ... |
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| IMPROVEMENTS IN CdS THIN FILM SOLAR CELLS. |
DEC 1968 |
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| Authors:
H. E. Nastelin; CLEVITE CORP CLEVELAND OHIO ELECTRONIC RESEARCH DIV
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| The performance of two CdS thin film solar cell flight panels, which were included in a satellite experiment in a high radiation orbit, showed no serious degradation after a period of 130 days. The results of balloon flight calibration tests indicate that AM0 performance of CdS thin film solar cells at 80,000 feet very closely parallels simulated AM0 measurements. The evaluation of a number of materials as contacts to the ... |
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| IMPROVED CDTE SOLAR CELL AND ARRAY ENVIRONMENTAL EFFECTS INVESTIGATION. |
MAR 1968 |
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| Authors:
Richard S. Schlotterbeck; GENERAL ELECTRIC CO LYNCHBURG VA
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| Basic materials research has been conducted in four general areas as follows: Electron diffraction and optical microscopy studies, quantum efficiency measurements versus wavelength under operating conditions, degradation tests under controlled ambient conditions and diffusion and solubility measurements using radioactive copper. A maximum efficiency of 5.5% (sunlight into electric power, ami) was calculated on the basis of the spectral response and I-V characteristic of a fresh, 'bare' single crystal cell. Efficiencies ... |
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| FABRICATION OF CADMIUM SULFIDE THIN FILM SOLAR CELLS FOR SPACE VEHICLE TESTING. |
DEC 1967 |
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| Authors:
H. E. Nastelin; J. R. Hietanen; F. A. Shirland; CLEVITE CORP CLEVELAND OHIO ELECTRONIC RESEARCH DIV
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| Five series of flight panels for satellite and balloon flight testing were prepared. Panels AR-1 through 6 were delivered to APL in September of 1965. Panels AR-8 through 10, of similar fabrication, were delivered in March of 1966. Panels ARX-701-1 through 4 were delivered in April of 1967 for inclusion in the OV1-13 satellite experiment. Three balloon flight modules, AFAPL-CdS-1, -2, and -3, were delivered to APL in May of ... |
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| IMPROVED CDTE SOLAR CELL AND ARRAY ENVIRONMENTAL EFFECTS INVESTIGATION. |
DEC 1967 |
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| Authors:
Richard S. Schlotterbeck; GENERAL ELECTRIC CO LYNCHBURG VA POLYCRYSTALLINE SEMICONDUCTOR PRODUCTS BUSIN ESS SECTION
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| A simple and quick procedure for preparing and testing CdTe: Cu2Te solar cells made from single crystalline CdTe is described. This new technique will reduce the overall time factor for device preparation and test and thereby increase the efficiency of research investigations. The applied research program was directed to studies of the effects of substrate etching and phosphorus doping on cell performance. It has been shown that the ferricyanide etch ... |
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| DENDRITIC SILICON SOLAR CELL OPTIMIZATION AND FABRICATION. |
OCT 1967 |
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| Authors:
T. D. Merritts; N. Ernick; Y. Ichikawa; WESTINGHOUSE ELECTRIC CORP YOUNGWOOD PA SEMICONDUCTOR DIV
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| This report describes the research and development work to optimize and fabricate dendritic silicon solar cells in the areas related to weight reduction, physical and electrical characteristics, and radiation resistance. A total of 970 diffused standard cells and 901 epitaxial drift field cells of 1 by 30.5 cm size were fabricated. The efficiency range of the standard cells was 9.0 to 13.3 percent with a mean of 10.5 percent, and ... |
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| HIGH VOLTAGE SOLAR CELL ARRAY SEGMENT. |
30 SEP 1967 |
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| Authors:
T. P. Nowalk; WESTINGHOUSE ELECTRIC CORP YOUNGWOOD PA SEMICONDUCTOR DIV
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| This report covers the progress on the High Voltage Solar Cell Array Segment. Processing of twelve inch long silicon web was performed. A number of modifications related to the photomasking and isolation diffusion steps were introduced which made this possible. The longest cell tested consisted of a 43-unit contiguous array which yielded VOC = 19.7 volts, ISC = 5.5 ma and PM = 71.4 mw under 100 sq cm tungsten ... |
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| THIN SILICON SOLAR CELLS BY ION IMPLANTATION. |
JUL 1967 |
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| Authors:
J. T. Burrill; K. Stirrup; ION PHYSICS CORP BURLINGTON MA
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| The report describes investigations performed over a 17 month period on the fabrication of thin n-on-p silicon cells using the ion implantation technique. Investigations conducted under this program represent an extension of investigations conducted on Contract AF33(615)-2292 and preceding contracts. Work on dendritic material demonstrated that cell quality is almost completely determined by the starting material. Although material of the highest quality was not available for use on this contract, ... |
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| ION IMPLANTATION JUNCTION TECHNIQUES. |
31 OCT 1966 |
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| Authors:
Q. J. King; J. T. Burrill; D. Smith; S. Harrison; S. J. Solomon; ION PHYSICS CORP BURLINGTON MA
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| The program is primarily directed at the fabrication of high power-to-weight ratio cells with integral coverslips. During this quarter investigations were concentrated on conventional silicon material cells. At a nominal thickness of 8 mils (without coverslip), efficiencies as high as 10.3% (AMO) and P/W ratios of 121 watts/lb have been achieved. At 5 mils, the respective numbers are 9.5% and 181 watts/lb. Eight mil cells with 1.5 integral coverslips were ... |
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| ION IMPLANTATION JUNCTION TECHNIQUES. |
31 JUL 1966 |
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| Authors:
W. J. King; J. T. Burrill; D. Smith; S. Harrison; S. J. Soloman; ION PHYSICS CORP BURLINGTON MA
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| The investigations being conducted under this program are based on prior investigations. The program is directed at optimization of the ion implantation method of fabricating solar cells from dendritic silicon for systems applications. During this quarter efforts have been primarily concerned with demonstrating that useful cell configurations can be made which include the dendrites as active material. Cells of this type have been made with efficiencies as high as 9.4% ... |
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| THE EFFECT OF 4 MEV ELECTRONS ON COVERED BRITISH SILICON SOLAR CELLS. |
FEB 1965 |
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| Authors:
F. C. Treble; ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)
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| An experimental study has been made of the effects of 4 MeV electron bombardment on the spectral response and orbital performance of two British makes of 10 ohm cm n/p silicon solar cells with cemented-on 0.006-in. glass cover slips. A subsidiary purpose of the study was to compare the latest measurement techniques employing short circuit current calibrations in the laboratory with those in Malta sunlight. The two methods were found ... |
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