سختپایی ِ مغناتیسی saxtpâyi-ye meqnâtisi
*Fr.: rigidité magnétique*
In → *plasma physics*, a → *quantity*
that describes the → *resistance* of a
→ *charged particle* to change its direction of motion under the
influence of a perpendicular → *magnetic field*.
Rigidity is defined as:
*R* = *r*_{L}*Bc* = (*pc*)/(*Ze*), where
*r*_{L} is the → *Larmor radius*, *B* is
→ *magnetic induction*,
*c* is the → *speed of light*,
*p* is the → *momentum* of the particle, *Z* is
→ *atomic number*, and *e* the
→ *electron charge*. Since *pc* has the dimensions of energy
and *e* the dimensions of charge, rigidity has the dimensions of
→ *volt*s (a 10 GeV proton has a rigidity of 10 GV).
In → *cosmic ray* studies, the energies of cosmic rays are often quoted
in terms of their rigidities, rather than their energies per nucleon. → *magnetic*; → *rigidity*. |