Results 181 to 190 of about 2,441 (222)
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Nonuniform Emission of Thermionic Cathodes
Journal of Applied Physics, 1966The nonuniform emission of thermionic cathodes has been studied with an anode-hole scanning technique by means of which ``effective'' work-function distributions could be obtained. Using these ``effective'' work-function distributions, information has been gained about the fraction of the total cathode surface that actually determines the saturated ...
C. G. J. Jansen +2 more
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Thermionic Emission Constants and Their Interpretation
Journal of Applied Physics, 1961A critical review of the procedures used in the measurement and interpretation of thermionic emission with particular reference to nonmetallic cathodes is presented. Definitions are proposed for the terms ``true work function,'' ``effective work function,'' and ``Richardson work function.'' The use of Schottky plots is criticized and the advantages of ...
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1978
Abstract : Results are presented for a program to validate the technology for thermionic field emission (TF) guns. TF guns are proposed as an attractive alternate to cold cathode guns as high average and high peak current density excitation sources for repetitively pulsed short wavelength lasers.
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Abstract : Results are presented for a program to validate the technology for thermionic field emission (TF) guns. TF guns are proposed as an attractive alternate to cold cathode guns as high average and high peak current density excitation sources for repetitively pulsed short wavelength lasers.
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The Universal Constant of Thermionic Emission
Physical Review, 1926Theoretical deduction of the formula for thermionic emission.---The constant $A$ of the thermionic emission formula: $I=A{T}^{2}{e}^{\ensuremath{-}\frac{{b}_{0}}{T}}$ has been shown by Richardson and Dushman by different lines of argument to be a universal constant, and a value for the constant has been deduced by Dushman.
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Thermionic emission of the GaAs photocathode
Solid-State Electronics, 1969Abstract The sources of thermionic emission (dark current) from the GaAs/CsO type of photocathode are considered. It is shown that for boat-grown GaAs the dominant emission components are likely to be due to generation of electron-hole pairs, at trapping centers in the band-bending region or via surface states.
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Thermionic Emission Spectroscopy of Metals
1984We know (see Chapter 1) that at sufficiently high temperatures, a small fraction of the electrons in a metal have energies higher than the maximum of the potential barrier at the surface and some of them escape from the metal giving rise to a thermionic current. The potential barrier is shown (schematically) in Fig. 9.1.
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