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Public Domain Picture: JILA 'Spinning Trap' for eEDM measurement

Courtesy: National Institute of Standards and Technology
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JILA 'Spinning Trap' for eEDM measurement
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JILA 'Spinning Trap' for eEDM measurement
Artist's conception of JILA's new technique for measuring the electron's roundness, or electric dipole moment (EDM). The method involves trapping molecular ions of hafnium fluoride (red and blue spheres, respectively) in spinning electric and magnetic fields. Researchers measure changes over time in the 'spin' direction of the molecules' unpaired electrons (arrows in yellow spheres), which act like tiny bar magnets. Specific patterns in the rate of change, reflecting alterations in the gap between two magnetic energy levels in the molecules, would indicate the existence and size of an EDM. See also edm.cfm Credit: Baxley/JILA Disclaimer: Any mention of commercial products within NIST web pages is for information only; it does not imply recommendation or endorsement by NIST. Use of NIST Information: These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology (NIST). With the exception of material marked as copyrighted, information presented on these pages is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credits is requested.
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April 14, 2014
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National Institute of Standards and Technology

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National Institute of Standards and Technology (Flickr Photostream)
External Site: National Institute of Standards and Technology
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