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IEEE Transactions on Electron Devices

Issue 8 • Aug. 1969

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Displaying Results 1 - 13 of 13
  • [Front cover and table of contents]

    Publication Year: 1969, Page(s): c1
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1969, Page(s): 671
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  • Metallurgical study of thermionic converters

    Publication Year: 1969, Page(s):672 - 678
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    This paper describes some of the observations made as a result of the test of 180 thermionic converters and of the postmortem metallographic examination of approximately 50 converters. The causes and effects of converter abnormal performance are related to the results of the metallographic examinations. The materials and fabrication methods utilized in converter construction are discussed together... View full abstract»

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  • Correlation of fixed-spacing thermionic converter performance with variable-spacing test vehicle data

    Publication Year: 1969, Page(s):679 - 686
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    Seven fixed-spacing thermionic converters with planar electrodes and one with cylindrical electrodes were designed and built on the basis of data from a planar variable-spacing thermionic test vehicle operated at emitter temperatures of 1600-2000 K in 100 degree increments. Electrodes in the variable-spacing device and in five of the planar converters were of polycrystalline rhenium; those in the ... View full abstract»

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  • Reproducibility of thermionic performance

    Publication Year: 1969, Page(s):686 - 688
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The performance of 12 identical thermionic converters fabricated to a given set of specifications, is reported. The converters were of planar geometry. The emitters were solid rhenium, and the collectors were arc-cast molybdenum. The average output power of the converters at an emitter temperature of 2000°K and an output voltage of 0.7 volt was 37.5 watts (18.75 W/cm2) with a stand... View full abstract»

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  • Thermionic research at Stresa: A review

    Publication Year: 1969, Page(s):689 - 697
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    At the recent International Conference on Thermionic Electrical Power Generation (Stresa, May 1968) a large number of research papers were presented which were devoted to an understanding of the thermionic diode. It is the purpose of the present paper to review the recent presentations at Stresa. It will be shown from these papers that in the 2½ years since the first International Conference,... View full abstract»

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  • Electron density and temperature measurements of the ignited mode plasma in a thermionic converter

    Publication Year: 1969, Page(s):698 - 703
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Spectroscopic measurements of the electron density and temperature have been made on a planar thermionic converter operated in the quasi-saturation region of the ignited mode. The effects of several independent converter variables on the electron density were investigated quantitatively. From this investigation it was found that the emitter temperature and current density were the most significant... View full abstract»

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  • Free area for translation calculated by Monte-Carlo simulation of surface migrations

    Publication Year: 1969, Page(s):703 - 707
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    It is assumed that surface mobility of alkali metals adsorbed on refractory metal surfaces is achieved by hops between adjacent adsorption sites and is constrained by intermetallic bonds with the surface as well as covalent (partly ionic) bonds and dipole interaction between adsorbed particles. A survey reduces the crystallographic considerations to two basic types. A Monte-Carlo computer simulati... View full abstract»

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  • Surface characterization studies on chemically vapor deposited tungsten

    Publication Year: 1969, Page(s):707 - 712
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Surface characterization studies were performed on chemically vapor deposited (CVD) tungsten. Two specimens of tungsten were taken from each of three sample lots and prepared with standard cleaning and firing procedures and then electropolished. In order to evaluate the effect of grain size, one set of specimens was given an additional vacuum firing at 2500°C to promote grain growth. Surfaces... View full abstract»

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  • An improved out-of-core thermionic reactor for low power

    Publication Year: 1969, Page(s):713 - 717
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    An analysis is made of a thermionic converter network coupled to a nuclear reactor heat source. The network is located out-of-core and the waste heat from the converters is removed by several heat pipes. The optimization, constraints, and advantages of this concept are described in some detail. Results are compared with in-core thermionic converter concept. View full abstract»

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  • Ultimate heat-pipe performance

    Publication Year: 1969, Page(s):717 - 723
    Cited by:  Papers (2)
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    Ultimate heat-transfer limitations imposed by sonic vapor flow were determined in heat pipes for sodium, potassium, and cesium working fluids. Each fluid was investigated in a heat pipe consisting of an inner porous tube, an annulus for liquid return, and an outer container tube. Thin, rigid tubes with very small pores were obtained by compressing several layers of fine-mesh screen. These tubes al... View full abstract»

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  • Effect of cesium pressure on thermionic stability

    Publication Year: 1969, Page(s):723 - 728
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    It is shown that under certain conditions of heat input, reservoir temperature, and load voltage or resistance a thermionic converter can equilibrate at two radically different operation points, corresponding to conditions of high and low cesium coverage. Moreover, abrupt transitions between these operating regimes, accompanied by a temperature rise of hundreds of degrees, can occur whenever the c... View full abstract»

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  • [Back cover]

    Publication Year: 1969, Page(s): c4
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Aims & Scope

IEEE Transactions on Electron Devices publishes original and significant contributions relating to the theory, modeling, design, performance and reliability of electron and ion integrated circuit devices and interconnects.

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief

Giovanni Ghione
Politecnico di Torino,
10129 Torino, Italy

Phone +39 011 090 4064
email giovanni.ghione@polito.it