Low-level RF - Part I: Longitudinal dynamics and beam-based loops in synchrotrons

Details Low-level RF - Part I: Longitudinal dynamics and beam-based loops in synchrotrons Low-level RF - Part I: Longitudinal dynamics and beam-based loops in synchrotrons

2012-01-12

arxiv.org/abs/1201.2597v1

CERN Yellow Report CERN-2011-007, pp. 341-367

Physics

Accelerator Physics

27 pages, contribution to the CAS - CERN Accelerator School: Specialised Course on RF for Accelerators; 8 - 17 Jun 2010, Ebelt

Scientific paper

The low-level RF system (LLRF) generates the drive sent to the high-power equipment. In synchrotrons, it uses signals from beam pick-ups (radial and longitudinal) to minimize the beam losses and provide a beam with reproducible parameters (intensity, bunch length, average momentum and momentum spread) for either the next accelerator or the physicists. This presentation is the first of three: it considers synchrotrons in the lowintensity regime where the voltage in the RF cavity is not influenced by the beam. As the author is in charge of the LHC LLRF and currently commissioning it, much material is particularly relevant to hadron machines. A section is concerned with radiation damping in lepton machines.

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