With the latest developments in fusion and x-ray astronomy research relying heavily on high-quality atomic data, the need for precise, up-to-date spectroscopic techniques is as vital now as it has ever been. This timely handbook brings together many of the techniques and ideas needed to carry out state-of-the-art research in the field. It presents light/ion sources, spectrometer, detector, and coincidence techniques and examines how atomic properties change along an isoelectronic sequence. The book also focuses on atomic structure and applications and discusses QED theory and PNC effects of highly charged ions.