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Latest News

Radio-frequency Shield Room Installed

For optimal performance the experiment’s SQUID magnetometers must reside in a hermetically sealed Faraday cage. The aluminum Cryovessel serves this function, but temperature sensors and other devices with wiring that penetrates the Cryovessel must terminate in a connected Faraday cage (the Radio-Frequency Screen Room, or RFSR) outside the Magnetic Shield

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Magnet Construction Update

Large size, cooling requirements, non-metallic construction all combine to make the nEDM@SNS magnet a complicated engineering and assembly challenge. Construction of the magnet is now well underway at Caltech.

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Light Collection Readout Production Electronics Tested

The nEDM@SNS experimental signal is a burst of scintillation light following the capture of a neutron by a Helium-3 nucleus. Processing electronics that use silicon photomultipliers to count the number of emitted photons and record their arrival time have now been completely tested.

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Experimental Building – Final Design Complete

Unusual requirements for the nEDM@SNS experimental building include a magnetic keep-out zone near the apparatus and a deep basement for access to the cryogenic interior. Final design of the building was recently completed. 3D CAD model of nEDM@SNS experimental building. Drawing of the experimental building and environs from final design

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Liquefier Recovery

A helium liquefier, associated compressors and large Helium gas storage tanks were recovered from the old Alpha-2 building at Y-12 ahead of its imminent demolition. They have a new lease on life and will supply the nEDM@SNS experiment with up to 40 liters of liquid helium per hours at a

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Cryovessel Design Complete

The final design of the nEDM@SNS Cryovessel (a large aluminum vacuum vessel which functions effectively like a giant thermos) was recently completed. Long-leadtime components are being ordered and fabrication will be starting imminently.

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SULI Posters

Two SULI recently completed all-virtual summer internships working on the nEDM@SNS experiment. Devon Loomis carried out simulations to optimize the design of the measurement cell windows and shielding and Michael Kline pioneered spin-tracking simulations using an array of GPUs.

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Cryo B Monitor

The nEDM@SNS experiment requires a magnetic field monitor operating near absolute zero temperature. Operating at zero temperature, especially given the experiment’s metallic keep-out zone is challenging. The cryogenic magnetic field monitor was recently completed at the University of Kentucky.  

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