safety factor: the number of time a magnetic field line goes around toroidally (long way) per each poloidal (short way) turn
beta: ratio of plasma kinetic pressure to magnetic field pressure
Bohm: Rapid, anomalous fussion of plasma particles scaled to T/B
gyro-Bohm: Rapid, anomalous fussion of plasma particles scaled to (rho)*T/B
edge-localized mode (ELM): an instability in H-mode plasmas which occur in short bursts
normalized radius (rho): distance from center/total radius. range: [0,1]
scrape-off layer (SOL): outer layer of plasma, where the magnetic field lines come in contact with metal surface