Strictly speaking, bremsstrahlung is any radiation due to the acceleration of a charged particle, which includes synchrotron radiation and cyclotron radiation; however, it is frequently used in the more narrow sense of radiation from electrons stopping in matter.
Strictly speaking, bremsstrahlung is any radiation due to the acceleration of a charged particle. A charged particle includes synchrotron radiation. A charged particle includes cyclotron radiation. It is frequently used in the more narrow sense of radiation from electrons. This was however. These electrons are stopping in matter.