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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

While fairly simple in design, a typical stainless-steel quadrupole might weigh several kilograms.

From Science Daily Jan. 4, 2024

A quadrupole, a common type of mass filter, is composed of four metallic rods surrounding an axis.

From Science Daily Jan. 4, 2024

Values of parameters are shown under the relevant structures: Qzz, z2 component of the quadrupole moment tensor; α, molecular polarizability; E, energy. c, Neutral receptors for anion binding.

From Nature Mar. 28, 2017

Mass spectrometric studies were performed on a Waters XEVO-G2 quadrupole time-of-flight mass spectrometer.

From Nature Mar. 28, 2017

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