[367] Middle Focus Wall and Experimental Cave for the instrument ESTIA

ESTIA is a neutron instrument designed and built by the Paul Scherrer Institut (PSI) in Switzerland for ESS. In general, the experimental areas consist of the stations (“instruments”) where the measurement of the samples takes place, and control hutches where the experiments are controlled. This document specifies the requirements for the design and manufacture of the Middle Focus wall (MFW) and the Experimental Cave for the instrument ESTIA. Both MFW and Experimental Cave structures have the primary function to block ionising radiation. The MFW is a separation wall located roughly halfway along the instrument and incorporates the instrument shutter (used to block the neutron beam and allow access into the Experimental Cave). On the other hand, the Experimental Cave is located at the very end of the instrument and consists of the cave walls, the roof including a sliding door and additional shielding elements. Part of the scope here described is also the local crane located inside the Experimental Cave.