Photoionization of Multiply Charged Ions at the Advanced Light Source

Photoionization of multiply charged ions is studied using the merged‐beams technique at the Advanced Light Source. An ion beam is created using a compact 10‐GHz all‐permanent‐magnet ECR ion source and is accelerated with a small accelerator. The ion beam is merged with a photon beam from an undulator to allow interaction over an extended path. Absolute photoionization cross sections have been measured for a variety of ions along both isoelectronic and isonuclear sequences.