Thermal and electrical enclosure box

The box enclosure is assembled from 8mm thick, flat sheets of polysocyanurat (PIR) foam that are reinforced on both sides with a single, 100um thick glass fibre skin are clad on both sides whit 25 um thick aluminium foil. For the side of box facing the beampipe, the wall thickness is reduced to 3mm to decrease the distance between the beam and the innermost detector modules, also 4 temperature sensors (pt100) are distributed inside the box. Mounted on the inside wall of the enclosure is a distribution channel for the nitrogen with which the box is flushed. Small inserts made out of fibreglass (stesalit) reinforced epoxy are embedded in the upper rim of the enclosure and permit to screw it onto the cover plate.