A controlled magnetic field (CMF) enclosure for experiments in magnetophysiology

In connection with some experimental studies on the effects of oscillatory magnetic fields on human physiology a special Controlled Magnetic Field (CMF) enclosure has been designed and constructed which permits the generation of any magnetic field, steady or oscillatory, around a human subject for any desired duration. The system, consisting of four large coils coaxially mounted with the axis along the local magnetic field vector, gives a magnetic field of exceptionally uniform value along or in opposition to the local geomagnetic field over a volume large enough to accommodate a normal human subject in any position, sitting or lying, along a North-South or East-West axis. The coil frames are wound with a Steady Field winding and an independent Oscillatory Field winding so that the ambient magnetic field can be increased or decreased to any value, and oscillatory fields of any amplitude and frequency can be impressed independently on the subject. The entire coil enclosure occupies an area of about 400 × 300 cm on the floor and the highest point of the system clears 415 cm above floor. The subject is placed at the centre at a height of 2 metres. © 1985.