quadrupoles

/ˈkwɑːdrəˌpoʊlz/
noun
  1. Plural of quadrupole; multiple distributions or devices with two positive and two negative poles.
    • The researchers designed new quadrupoles for the next-generation accelerator.
    • Quadrupoles are essential components in modern mass spectrometers.
    • The laboratory uses several quadrupoles to control the particle beams.