Diagnostics Examples from Third-Generation Light Sources

This lesson discusses many examples of how the signals from the beam monitors are used to diagnose the beam in circular, third-generation synchrotron light sources. During the school, diagnostic examples in other machines (e.g. colliders, CTF3, linacs and free-electron lasers (FEL), and medical accelerators) were given in other lectures. This lesson assumes that the signal generation in the instrument itself is already known; the main focus lies on the dependence of the signals on various machine parameters and their interpretation to diagnose the machine parameters and conditions.Comment: 22 pages, contribution to the CAS - CERN Accelerator School: Beam Instrumentation, 2-15 June 2018, Tuusula, Finlan

Beam Loss Monitors

This lecture covers the fundamental aspects of the measurement of beam losses including their use for beam diagnostic and safety issues. The detailed functionality and detection principle of various common beam loss monitors are also presented, with a focus on their intrinsic sensitivity.Comment: 39 pages, contribution to the CAS - CERN Accelerator School: Beam Instrumentation, 2-15 June 2018, Tuusula, Finlan

Beam halo and bunch purity monitoring

Beam halo measurements imply measurements of beam profiles with a very high dynamic range; in transverse and also longitudinal planes. This lesson gives an overview of high dynamic range instruments for beam halo measurements. In addition halo definitions and quantifications in view of beam instrumentation are discussed.Comment: 29 pages, contribution to the CAS - CERN Accelerator School: Beam Instrumentation, 2-15 June 2018, Tuusula, Finland. arXiv admin note: text overlap with arXiv:1303.676

Specific instrumentation and diagnostics for high-intensity hadron beams

An overview of various typical instruments used for high-intensity hadron beams is given. In addition, a few important diagnostic methods are discussed which are quite special for these kinds of beams.Comment: 58 pages, contribution to the CAS - CERN Accelerator School: Course on High Power Hadron Machines; 24 May - 2 Jun 2011, Bilbao, Spai

Radiation damage in PIN-photodiodes

The investigations of radiation damages to Si-PIN-photodiodes are done in view of their applicability as beam loss monitors for the HERA p-ring. The results indicate that photodiodes can withstand doses of 5×10$^3$ Gy without any problems, except a small increase of dark currents. Therefore, these diodes could be used as loss monitors in HERA for several years

A Non Destructive Way to measure Betatron Mismatch at Injection

Betatron mismatch between a chain of proton (or ion) accelerators blows up the emittance of the beam. Following the ideas of Ref. 1, we study the use of Residual Gas Ionization ProfileMonitors to measure this mismatch without disturbing the beam. A turn by turn readout can be performed by electrical or video readout. The sensitivity of the monitor is adjustable over a few decades by a local gas bump. First studies at DESY III will be presented