Gyromotion
= Gyromotion
{title2=$\Omega_s=q_sB/(m_sc)$}
= Cyclotron orbit
{synonym}
= Cyclotron motion
{synonym}
Rapid circular particle motion perpendicular to a locally uniform <magnetic field>, superposed on parallel streaming when the parallel <velocity> is nonzero. In <Gaussian units>, its signed <cyclotron frequency> is given in the title and its <gyroradius> is $v_\perp/|\Omega_s|$. Slowly varying fields permit a <guiding center> description.