Major Milestone at ESS

The Target Wheel and shaft and the Moderator Reflector Plug got succesfully installed into the Target Monolith at the ESS. This is a major milestone on the ESS Road to Science.

The moderator is positioned so it sits above the part of the target wheel that is being struck by the beam of protons. Its job is to slow down the neutrons after spallation to an energy suitable for the researchers to use on their samples in the instruments. The moderator was installed in a replaceable plug, along with a beryllium-lined neutron reflector, and all the systems to keep the system cool. This so-called Moderator Reflector Plug is designed to be replaceable every few years as upgraded versions become available, and was delivered as german in-kind contribution by ZEA-1.

This movie shows the installation with commentary and explanations on how it works and why it is important, presented by ESS staff and In-Kind Partners.

The FZJ/ZEA-1 related part about the Twister can be seen from minute 7:17.

More information on the whole target system can be found here: https://europeanspallationsource.se/target/how-it-works