JAN 3, 2018
The ESS Target Division has announced that manufacturing of all three Butterfly V2 cold moderators was completed in December.
The ESS novel low-dimensional moderator design has been brought to life at ESS in-kind partner Forschungszentrum Jülich (FZJ), where the project was led by Yannick Beßler.
The baseline design adopted in 2015 resulted from optimisations carried out at ESS and verified through testing at J-PARC. The optimised design is estimated to increase neutron flux at ESS by up to a factor of 2.5 over the original 2012 design, leading to a significant increase in the scientific capabilities of the facility as a whole.
The team at FZJ has successfully electron-beam-welded and leak-tested the three moderator vessels, making them ready for assembly in the Moderator & Reflector Plug. The moderator consists of one pair of mirrored vessels, and the third vessel will serve as a reserve in the event of a testing failure.
Factory testing of the completed Moderator & Reflector Assembly is planned for this summer, with the full system to be delivered as a German in-kind contribution in the fall.
RESP. ENGINEERS: Y. Beßler (FZJ), F. Hanusch (FZJ), Daniel Lyngh (ESS), Marc Kickulies (ESS)