undulator

noun un·du·la·tor \ -ātə- \

Definition of undulator

plural -s
1 :one that undulates
  • a lovely blonde lady undulator
  • Wall Street Journal
2 :a device consisting of a series of magnetic dipoles of alternating polarity into which a stream of particles (such as electrons) moving at relativistic velocity is injected to produce intense essentially monochromatic coherent synchrotron radiation at a very few wavelengths

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