Magnet Safety
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4 Magnet Safety
An NMR superconducting magnet system can be operated easily and safely provided the
correct procedures are obeyed and certain precautions observed.
These notes must be read and understood by everyone who comes into contact with an NMR
superconducting magnet system. They are not for the sole information of senior or specialist
staff.
Proper training procedures must be undertaken to educate effectively all people concerned
with such equipment with these requirements.
Since the field of the NMR magnet system is three dimensional, consideration must be given
to floors above and below the magnet as well as to the surrounding space at the same level.
Warning: To minimize shock hazards the magnet and its stand must be connected to
the electrical ground of the cabinet!
Warning Areas
The installation and operation of an NMR superconducting magnet system presents a
number of hazards of which all personnel must be aware. It is essential that:
• Areas in which NMR magnet systems are to be installed and operated, and generally the
process of the installation, are planned with full consideration for safety.
• Such premises and installations are operated in a safe manner and in accordance with
proper procedures.
• Adequate training is given to personnel.
• Clear notices are placed and maintained to effectively warn people that they are entering
a hazardous area.
• All health and safety procedures are observed.
These notes outline aspects of operation and installation which are of particular importance.
However, the recommendations given cannot cover every eventuality and if any doubt arises
during the operation of the system the user is strongly advised to contact the supplier. It is the
intention of Bruker’s customers to communicate effectively the information in this manual
regarding safety procedure and hazards associated with NMR magnet systems to their own
customers and to users of the equipment.
4.1 Magnetic Field
NMR superconducting magnets pose numerous hazards related to the forces caused by the
strong magnetic fields associated to these magnets. Precautions must be taken to ensure
that hazards will not occur due to the effects of a magnetic field on magnetic materials, or on
surgical implants. Such effects include, but are not limited to:
Large attractive forces may be exerted on equipment in the proximity of the NMR magnet
system. The force may become large enough to move the equipment uncontrollably towards
the NMR magnet system. Small pieces of equipment may therefore become projectiles.
Large equipment (e.g. gas bottles, power supplies) could cause bodies or limbs to become
trapped between the equipment and the magnet.
The closer a ferromagnetic object gets to the magnet, the larger the force. Also, the larger the
equipment mass, the larger the force.
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