What specific type of particle motion causes synchrotron radiation in strong magnetic fields, as opposed to the random thermal motion that causes bremsstrahlung?

Synchrotron radiation is specifically caused by the continuous centripetal acceleration of charged particles, typically electrons, moving at relativistic speeds (speeds approaching the speed of light) in a strong, uniform magnetic field. The magnetic field exerts a Lorentz force on the moving electron, which is always perpendicular to both the electron's velocity and the magnetic field direction. This force continuously deviates the electron from a straight path, compelling it into a circular or helical trajectory. The constant change in direction, which is a form of acceleration directed towards the center of the circular path (centripetal acceleration), is the ....