Beam diagnostic instruments are the eyes of the accelerator, the best - or even the only - tools that we have to monitor and control the beam. This lectures will give the basics of "what, where and how" of beam diagnostics.
Different types of accelerators calls for different diagnostic methods. We will discuss the most important beam parameters that generally are monitored, a few common detector types, and how to analyze and meet the needs of each and every accelerator.
Types of parameter: position, intensity, transverse and longitudinal profile, energy.
important concepts: resolution and accuracy, invasive or non-invasive, single-shot or multi-shot, common techniques: Faraday cup, pick-up, scintillation and OTR screens, wire scanner, SEM-grid, laser-based instruments.