PHASE AND SYNCHRONOUS DETECTOR THEORY AS APPLIED TO BEAM POSITION AND INTENSITY MEASUREMENTS

摘要

A popular signal processing technique for beam position measurements uses the principle of amplitude-modulation -to-phase-modulation (AM/PM) conversion and phase detection. This technique processes position-sensitive beam-image-current probe-signals into output signals that are proportional to the beam's position. These same probe signals may be summed and processed in a different fashion to provide output signals that are proportional to the peak beam current. This paper derives the transfer functions for the AM/PM beam position and peak beam current processors.