Editing Synchrotron (section)

=== Injection procedure ===
Unlike in a cyclotron, synchrotrons are unable to accelerate particles from zero kinetic energy; one of the obvious reasons for this is that its closed particle path would be cut by a device that emits particles. Thus, schemes were developed to inject pre-accelerated [[particle beam]]s into a synchrotron. The pre-acceleration can be realized by a chain of other accelerator structures like a [[linac]], a [[microtron]] or another synchrotron; all of these in turn need to be fed by a particle source comprising a simple high voltage power supply, typically a [[Cockcroft-Walton generator]].{{Citation needed|date=January 2021}}

Starting from an appropriate initial value determined by the injection energy, the field strength of the [[dipole magnet]]s is then increased. If the high energy particles are emitted at the end of the acceleration procedure, e.g. to a target or to another accelerator, the field strength is again decreased to injection level, starting a new ''injection cycle''. Depending on the method of magnet control used, the time interval for one cycle can vary substantially between different installations.{{Citation needed|date=January 2021}}