CONSTRUCTION OF SHIELDED ROOM FOR BIOMAGNETIC MEASUREMENTS

摘要

A shielded room (20) is constructed by mechanically attaching electrically conducting facing sheets (32) to the beams (30) of a frame in a manner such that there is a continuous electrical current flow path (44) between the facing sheets. The mechanical interfaces in the current flow path are sealed with a layer of copper or zinc (34) at the interface, the copper or zinc layer being preferably applied to one or both of the pieces that meet at the interface by a spraying technique such as plasma spraying. The copper or zinc connector seal ensures a continuous current flow path along the length of the mechanical interface, and prevents leakage of electromagnetic energy into the interior of the room. A magnetic field barrier such as sheets (48) of mu-metal can be supported on the assembled structure. The room (20) is readily assembled with mechanical fasteners (42), which permits it to be later disassembled and moved if necessary.