||A magnetohydrodynamic safety factor describing the number of times field lines need to pass round the major circumference of the plasma before they close around the minor circumference;
||National Institutes for Quantum and Radiological Science and Technology
||QA, all those planned and systematic actions necessary to provide assurance when a facility, structure, system or component will perform satisfactorily and safely in service. The prevention of defects.
||QC, all actions necessary to verify conformance to requirements, and to control nonconformities or deficiencies. Quality Control is an inspection function, the detection and control of deficiencies.
||See quench time. Also, the procedure by which a superconducting magnet starts behaving as a normal conductor with resistive heating, usually due to a source of local heating or poor coolant flow. The magnet quench is handled by a discharge system to remove the magnetic energy as fast as is prudent.
||Usually, the time needed to extinguish the plasma current.