quadrupole

quadrupole
a) a distribution of either electric charge or magnetization equivalent to two dipoles that point in opposite directions
b) a magnet with two north poles and two south poles, used to focus a beam of particles

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  • Quadrupole — Quadrupôle Le quadrupôle, en électrostatique, est une distribution de charges, ayant pour particularité que les barycentres des charges respectivement positives et négatives sont confondus. Sommaire 1 Analyse du quadrupôle 1.1 Développement… …   Wikipédia en Français

  • quadrupôle — ● quadrupôle nom masculin Assemblage de quatre pôles magnétiques de signes alternés, dont on utilise l action sur un faisceau de particules chargées. (Deux quadrupôles successifs constituent l équivalent magnétique d une lentille convergente.) …   Encyclopédie Universelle

  • Quadrupole — A quadrupole or quadrapole is one of a sequence of configurations of for example electric charge or current, or gravitational mass that can exist in ideal form, but it is usually just part of a multipole expansion of a more complex structure… …   Wikipedia

  • Quadrupôle — Le quadrupôle, en électrostatique, est une distribution de charges, ayant pour particularité que les barycentres des charges respectivement positives et négatives sont confondus. Sommaire 1 Analyse du quadrupôle 1.1 Développement quadrupolaire… …   Wikipédia en Français

  • quadrupole — kvadrupolis statusas T sritis fizika atitikmenys: angl. quadrupole vok. Quadrupol, m rus. квадруполь, m pranc. quadripôle, m; quadrupôle, m …   Fizikos terminų žodynas

  • quadrupôle — kvadrupolis statusas T sritis fizika atitikmenys: angl. quadrupole vok. Quadrupol, m rus. квадруполь, m pranc. quadripôle, m; quadrupôle, m …   Fizikos terminų žodynas

  • quadrupole — kvadrupolis statusas T sritis chemija apibrėžtis Keturių taškinių elektros krūvių sistema, kurios bendras elektros krūvis lygus nuliui. atitikmenys: angl. quadrupole rus. квадруполь …   Chemijos terminų aiškinamasis žodynas

  • quadrupole — A collection of charges such that the potential at a point distance r from their center of mass may be expressed by an infinite series of terms in inverse powers of r. The inverse third power term is the quadrupole potential …   Dictionary of automotive terms

  • Quadrupole magnet — Quadrupole magnets consist of groups of four magnets laid out so that in the multipole expansion of the field the dipole terms cancel and where the lowest significant terms in the field equations are quadrupole. Quadrupole magnets are useful as… …   Wikipedia

  • Quadrupole ion trap — Scheme of a Quadrupole ion trap of classical setup with a particle of positive charge (dark red), surrounded by a cloud of similarly charged particles (light red). The electric field E (blue) is generated by a quadrupole of endcaps (a, positive)… …   Wikipedia

  • Quadrupole mass analyzer — The quadrupole mass analyzer is one type of mass analyzer used in mass spectrometry. As the name implies, it consists of 4 circular rods, set perfectly parallel to each other.cite book|last=de Hoffmann|first=Edmond|coauthors=Vincent… …   Wikipedia

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