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Magnetic Shield Enclosure under construction.

Magnetic Shield Enclosure under construction.   Details: The nEDM@SNS experimental apparatus must be shielded from stray magnetic fields. A multi-layer Magnetic Shield Enclosure (MSE) is being assembled for this purpose by IMEDCO, a Swiss firm specializing in magnetic shielding applications. This video shows the assembly in action.

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Outer Vacuum Chamber Delivered

The nEDM@SNS experiment uses the equivalent of an oversized travel mug to surround the large volume of liquid helium at its heart with a vacuum layer to prevent it from heating up. The so-called Outer Vacuum Chamber (OVC) was recently delivered to ORNL. nEDM@SNS Outer Vacuum Chamber arriving from GNB

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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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