Figure 2
From: A lightweight magnetically shielded room with active shielding
The window coil active magnetic shielding system. (a) Parameterisation of the window coil. Four square coils are arranged with four-fold symmetry on each face. The coil square side length, offset from the centre of the window and offset in the vertical axis are shared between all faces. Coil parameters are optimised to produce known components of magnetic field over the central cubic metre of the MSR. (b) Final optimised window coil featuring 24 identical square coils. This structure is challenging to engineer due to the need to incorporate the access door and projection ports in 3/6 walls. (c) Adapted design accounts for geometry of the MSR and features 27 coils. (d) Drawing of the corner of a single coil panel. To accommodate 20 turns of wire in each coil, a series of grooves are arranged in a spiral pattern into which copper wire is placed. The conductor return path is also shown. (e) Final model of the window coil featuring all panels. (f) Photograph of installed coil panels (floor coils hidden beneath the flooring and door coils hidden by angle of photograph) taken prior to cladding.
