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quadrupole

British  
/ ˈkwɒdrʊˌpəʊl /

noun

  1. physics a set of four associated positive and negative electric charges or two associated magnetic dipoles

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Their miniaturized filter, known as a quadrupole, can be completely fabricated in a matter of hours for a few dollars.

From Science Daily ● Jan. 4, 2024

This lightweight, cheap, yet precise quadrupole is one important step in Luis Fernando Velásquez-García's 20-year quest to produce a 3D-printed, portable mass spectrometer.

From Science Daily ● Jan. 4, 2024

Taken together, this is the first direct observation of the spin quadrupole moments in a spin-nematic phase.

From Science Daily ● Dec. 13, 2023

Giant quadrupole resonance in 24,26Mg: a comparison of inelastic-scattering and α-capture experiments.

From Nature ● May 22, 2018

The stabilizing nature of anion–π interactions is typically attributed to a combination of electrostatic and ion-induced polarization effects, which can be described by the Qzz component of the arene’s quadrupole moment and its polarizability, respectively.

From Nature ● Mar. 28, 2017

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