a vacuum tube containing a number of dynodes that serve to amplify the flow of electrons from the cathode by means of secondary emission.
(physics) a device for amplifying and measuring a flux of electrons. Each electron hits an anode surface and releases secondary electrons that are accelerated to a second surface; after several such stages a measurable pulse of current is obtained
An electrical component in which a single electron can create a large current flow. Electron multipliers are used in photomultipliers, particle detectors, and electron microscopes. ◇ In tube electron multipliers, electrons released from a cathode collide with a dynode or anode, causing release of more electrons through secondary emission; this process is generally repeated through a number of stages to achieve great amplification of current. Electron multipliers are also called electron amplifiers.
[ih-lek-tron-noo-tree-noh, -nyoo-] /ɪˈlɛk trɒn nuˌtri noʊ, -nyu-/ noun, plural electron-neutrinos. Physics. 1. a type of neutrino that obeys a conservation law together with the electron, with the total number of electrons and electron-neutrinos minus the total number of their antiparticles remaining constant.
noun, (used with a singular verb) 1. the study and use of the physical and optical properties of beams of electrons under the influence of electric or magnetic fields. noun 1. (functioning as sing) the study and use of beams of electrons and of their deflection and focusing by electric and magnetic fields
noun 1. Chemistry. two electrons occupying the same orbital in an atom or molecule; two electrons working together, especially forming a nonpolar covalent bond between atoms. 2. Physics. an electron and a positron produced in a reaction, as by a high-energy photon. electron pair
- Electron probe microanalysis
noun 1. a technique for the analysis of a very small amount of material by bombarding it with a narrow beam of electrons and examining the resulting X-ray emission spectrum