BEAM BASED ALIGNMENT AT THE POHANG LIGHT SOURCE

摘要

A beam based alignment method was adopted to recalibrate the Beam Position Monitors (BPM) to the center of quadrupole magnets at the Pohang Light Source (PLS). We added a shunt circuit to each quadrupole magnet to control the current independently. This alignment method involves BPM readings and shunt impedance controls at the quadurpole magnets. This paper presents the beam based alignment control mechanism, the process, and the results.