Electron beam diagnostics are systems to measure charge, current, position, time structure and electron losses. For Diamond that comprises:

• wall current monitors, faraday cups and current transformers to measure charge or stored current
• screen and synchrotron light monitors in the LINAC and transfer paths to image the bunch train
• x-ray pinhole cameras to image the stored beam
• distributed strip-line and button pickups together with processing electronics to monitor the beam position
• a visible light beam line with photon counting electronics and a streak camera to assess the time structure of the stored beam
• two types of distributed beam loss monitors (fast and slow) to generate a picture of the distribution of losses around Diamond
• x-ray beam position monitors mounted close to the insertion devices
• screen and diamond fluorescence monitors in the optics hutches to image the beam and to facilitate alignment
• quad-beam position monitors in the optics and experimental hutches to track the beam position
• scattering foils and diodes to measure beam intensity in the optics and experimental hutches

The information gathered by these systems feeds into the control system and is available for display and further processing. Position and angle information is used to align and focus the beam. Additionally, the beam position information will be distributed using a dedicated optical network and serve as the input to calculated corrector magnet settings as part of a global beam orbit fast feedback system, or for closed-loop control of optical element positions for microfocus applications.