570
- VESPA BERYLLIUM FILTER SYSTEM
Tender notice
Deadline for tenders 2026-05-22, the notice is published between 2026-04-17 and 2026-05-22. Place of execution Sweden, Östra Sverige, Stockholm, Stockholms län, Östra Mellansverige, Uppsala län, Södermanlands län, Östergötlands län, Örebro län, Västermanlands län, Södra Sverige, Småland och öarna, Jönköpings län, Kronobergs län, Kalmar län, Gotlands län, Sydsverige, Blekinge län, Skåne län, Västsverige, Hallands län, Västra Götalands län, Norra sverige, Norra mellansverige, Värmlands län, Dalarnas län, Gävleborgs län, Mellersta Norrland, Västernorrlands län, Jämtlands län, Övre Norrland, Västerbottens län, Norrbottens län.
The Beryllium Filter System is a component of the VESPA neutron spectrometer in construction at the ESS. The filter system is constituted of wedges of beryllium intercalated with sheets of cadmium, which also clads the outer faces not in the neutron beam path (top, bottom, sides). The purpose of the filter system is to suppress high energy neutrons (> 5 meV, scattered by the beryllium wedge and absorbed by the cadmium), while letting low energy neutrons (< 5 meV) through. The filter system needs to be delivered assembled. 4 units of filters are required.