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Thermoelectric Properties of the Plasma Diode

Description: It is well known that thermionic emission into vacuum is accompanied by a Peltier cooling of the vacuum metal interface. The interface may be thought of as a junction between two conductors: the metal, and an electron gas whose distribution is determined primarily by space charge. The addition of a small amount of easily ionized gas to the vacuum region does not affect the Peltier cooling of the interface, but is does squeeze the space charge region to about one micron and replaces most of the … more
Date: July 25, 1958
Creator: Lewis, H. W. & Reitz, John R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermal Reliability Study of Bypass Diodes in Photovoltaic Modules (Poster)

Description: This paper presents the result of high-temperature durability and thermal cycling testing and analysis for the selected diodes to study the detail of the thermal design and relative long-term reliability of the bypass diodes used to limit the detrimental effects of module hot-spot susceptibility.
Date: May 1, 2013
Creator: Zhang, Z.; Wohlgemuth, J. & Kurtz, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ON THE DESIGN OF A VERY HIGH-SPEED COMPUTER. Report No. 80

Description: The feasibility of constrncting a digital computer about one hundrnd times faster than present computers, such as ILLIAC, using transistonized circuits and other presently avnilable components and techniques is reported. The results of two design studies are discussed. One involves a minimum of buffer storage in the form of transistor registers, and the other involves a moderrts ammount of buffer storage in the form of a small-capacity, high-speed, random-access buffer memory. Tbe former design… more
Date: October 1, 1957
Creator: Gillies, D.B.; Meagher, R.E.; Muller, D.E.; McKay, R.W.; Nash, J.P.; Robertson, J.E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Diagnostic and Thermometry Methods for In-Pile Thermionic Converter Testing.

Description: This report describes the diagnostic and thermometry methods used for in-pile thermionic converters tested at Gulf General Atomic. The first section deals with the type of instrumentation used on each converter. The second section deals with test procedure. The third section describes the data analysis which is performed and includes discussion of methods used to calculate the emitter temperature and diode input power. In addition, the calculation and interpretation of the relative power and re… more
Date: January 1, 1969
Creator: Yates, M. K. & Holland, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Automated Digital Computer Program for Determining Responses of Electronic Systems to Transient Nuclear Radiation. Volume Iii. Treat Component Analysis Program

Description: This volume describes work accomplished by IBM in the development and application of digital computer programs for the automated analysis and prediction f the effects of pulses of nuclear radiation on circuits and components.
Date: August 1, 1964
Creator: International Business Machines Corp.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SNAP Programs. Thermionic Isotopic Power Systems. Quarterly Progress Report No. 6, January 1 Through March 31, 1961

Description: Progress in thermionic technology necessary for the development of power supplies utilizing radioisotopes as heat sources is reviewed. An investigation was made of the characteristics of cesium-filled thermionic converters operating in the low temperature region. Parametric studies were made of the cesium diode with a tantalum emitter and no back emission and operational characteristics were determined in the collision-free region. Work was continued on the vacuum diode generator, with emphasis… more
Date: October 31, 1961
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SNAP Programs. Quarterly Progress Report No. 1 for October 22-December 31, 1959

Description: An analysis was made of the SNAP III generator to determine the cause of failure, and the test specifications were revised in line with the findings. During calibration and demonstration runs with the SNAP III-A generator, a leak developed in the valving mechanism of the variable heatdump system. An examination disclosed that the valve was not satisfactory, so the generator was returned to the manufacturer for repair. A description is given of the generator, along with a performance evaluation … more
Date: November 1, 1960
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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STABILITY TESTS ON THE TYPES IN430A AND IN430B AVALANCHE DIODE REGULATORS

Description: The manufacturers' specifications for temperature coefficient of voltage and internaI impedance of the compensated avalanche diode types IN430A and IN430B appear quite promising. These devices couId be used as shunt regulators in high stability power supplies if the noise and drift rate were sufficiently small. One investigator reported the voltage did not drift more than the J-57 engin 0.002 per cent over a 7,000 hour period. Stability tests were performed on two diode samples under resonable … more
Date: December 31, 1958
Creator: Blankenship, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Emission Characteristics of Tantalum, Tungsten, Rhenium, and Iridium in Plasma Diodes

Description: Experimental determinations of the ionic and electronic emission characteristics of Ta, W, Re, and lr cathodes in vapor thermionic converters are compared. It is shown that Ta provides superior thermal ionization qualities at high pressure compared with W, Re, and Lr. High electronic current densities may be obtained from Cs on Re and Cs on Ir at much lower Cs vapor pressures than from Ta or W. An over-all efficiency of 19% was achieved with a Re cathode at 2440 deg K. (auth)
Date: March 15, 1962
Creator: Gust, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Cesium Line Shapes

Description: In partially-ionized cesium plasmas above 10/sup 13/ ionscm/sup -3/, the plasma-broadened lines are easily measured and can be used as a simple diagnostic method for the determination of ion density, once the width versus ion density relationship is established either theoretically or experimentally. Measured line widths are presented and results are compared with theoretical widths. The profiles of various lines of the sharp, diffuse, and fundamental series lines of cesium were measured at kno… more
Date: January 1, 1962
Creator: Agnew, L. & Summers, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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OPTIMIZATION OF EFFICIENCY OF A CESIUM DIODE CONVERTER

Description: The efficiency of the converter is computed with the least possible assumptions. The current density in the diode is assumed to be given by the Richardson-Dushman equation. The interelectrode spacing is assumed to be very small, and the contribution of the thermal conductivty across the plasma to the diode losses is taken into account. The effects of thermal emissivty and interelectrode heat transfer coefficient on the efficiency are investigated. Plots are given for maximum efficiency and othe… more
Date: March 1, 1962
Creator: Sanathanan, C.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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