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See also: quadrupôle


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quadrupole (plural quadrupoles)

  1. (physics) A distribution of either electric charge or magnetization equivalent to two dipoles that point in opposite directions.
    • 1975, David M. Cook, The Theory of the Electromagnetic Field, page 123:
      Consider a linear quadrupole consisting of a point charge of strength 2q at the origin and point charges of strength —q at (0, 0, a) and (0, 0, —a).
  2. (physics) A magnet with two north poles and two south poles, used to focus a beam of particles.

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