Synchrotron critical frequency
= Synchrotron critical frequency
{title2=$\omega_c$}
For an ultrarelativistic circular orbit of curvature radius $\rho$, the conventional critical angular <frequency> is $\omega_c=3\gamma^3c/(2\rho)$. It sets the broad spectral scale rather than a strict maximum <frequency>.<Synchrotron Radiation in the Geant4 Physics Reference Manual by Geant4 Collaboration>[Critical energy and critical mode number]{ref}