Introduction to the Measurement of Noise with Application to Particle Accelerator Beam Stabilization

摘要

One of the most important figures of merit for a synchrotron radiation source, once specified beam intensity and energy have been achieved, is charged particle beam stability. While a significant effort has been expended at the Advanced Photon Source (APS) to reduce or eliminate undesirable sources of beam motion, it will be necessary to employ active feedback to stabilize the user photon beams to the very stringent levels required. This becomes especially important when one considers that transverse beam stability is generally quoted as a fraction of beam dimensions. Since source brightness tends to be inversely proportional to these transverse dimensions, it should be evident that x-ray beamline users in general will support any and all efforts to reduce the transverse charged particle beam dimensions.