Results 161 to 170 of about 2,441 (222)
Some of the next articles are maybe not open access.

Related searches:

Thermionic emission controller with PID algorithm

2016 MIXDES - 23rd International Conference Mixed Design of Integrated Circuits and Systems, 2016
The reported digital thermionic emission current controllers use floating voltage sources which produce noise current and consequently decrease the quality of an electron beam. The implementation of digital control in an electron source biasing system without floating sources gives the average value of the electron emission current standard deviation ...
Bartosz Kania, Jaroslaw Sikora
openaire   +1 more source

Surface structure of thermionic-emission cathodes

Physical Review Letters, 1987
We have used surface extended x-ray absorption fine structure (SEXAFS) to study the local geometry around barium atoms on thermionic cathodes. On the surfaces of tungsten and tungsten-osmium alloy dispenser cathodes Ba is bonded to oxygen with a well-defined short-range order.
, Norman   +7 more
openaire   +2 more sources

LASER-INDUCED THERMIONIC EMISSION

Applied Physics Letters, 1963
An experiment in which the electron emission signal resulting from the interacti on of a ruby laser beam with thoriated W was found to be related to thermionlc emission from W is described. Theoretical expressions relating the electron emission to the thermionic emission gave good agreement with experimental results. (D.C.W.)
C. M. Verber, A. H. Adelman
openaire   +2 more sources

Theory of thermionic emission

Surface Science Letters, 1982
Abstract A comprehensive theory of thermionic emission from clean metal surfaces is presented. The theory takes into account the energy band structure of the metal, inelastic scattering due to electron-electron collisions and the thermal vibration of the atoms. We applied the theory to thermionic emission from Cu(100).
openaire   +1 more source

Alternatives to thermionic emission

British Journal of Applied Physics, 1965
The main fields of application of thermionic emission are analysed with a view to determining possible advantages of finding alternative approaches. For this purpose a distinction is made between applications where the emitted electrons are employed to transport charge and applications where they are used to transport and convert energy.
openaire   +1 more source

Thermionic Emission into Dielectric Liquids

Physical Review, 1937
The presence of thermionic emission at ordinary temperatures for cathodes in contact with dielectric liquids is demonstrated. The current voltage relation is shown to obey the law $I={I}_{0}{e}^{(\frac{\ensuremath{\epsilon}{(\ensuremath{\epsilon}FD)}^{\frac{1}{2}}}{\mathrm{kT}})}$, where $I$ is the current, $F$ the field, and $D$ the dielectric ...
Edward B. Baker, Howard A. Boltz
openaire   +1 more source

Home - About - Disclaimer - Privacy