Model of 1m from the BEBC weld cooling elements

Fixing the heat-exchangers onto the body of the 1 metre model of the large European hydrogen bubble chamber by metalizing with copper. This technique was developed in the West workshop and was used for the first time on the model. It ensures a good mechanical bond and excellent heat conductivity. The model was to be used for a thorough investigation of the thermo-dynamic problems connected with the new chamber. It also served to study the behaviour at low temperatures of the plastic materials intended for the expansion system. The large European chamber was unusual in having its expansion system operating at the bottom of the chamber. The model was also used to study the chamber optics.