As the particle beams travel through the chain of injectors from the source to the LHC, they periodically meet resonant cavities where they experience longitudinal electromagnetic fields of different frequencies and amplitudes, which provide them with an increase in energy and a timing pattern.
The IS Section is responsible for all resonant cavities in the synchrotron accelerators located on the Meyrin site of CERN and of the high power amplifiers and controls that are instrumental for producing the electromagnetic fields in the required conditions.
The Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS), the Antiproton Decelerator (AD), the Low Energy Ion Ring (LEIR) are equipped with a total of 42 cavities, with their own high power amplification chain, operating in a frequency range going from 0.3 to 200 MHz. Solid state transistors and vacuum tubes are the main components in the power amplifiers to provide the required RF power that feeds the resonant cavities, with peak RF power ranging from 1 to 700 kW delivered to the final loads.
The IS section is highly committed to the maintenance and operation of the existing RF high power systems in the Meyrin PS synchrotron complex and deeply involved in the development work that is crucial to achieve the goals of the LHC Injector Upgrade (LIU) program: brand new cavities and amplification system for the PSB, upgraded amplifiers for the PS, longitudinal and transverse dampers in the PSB and PS, relevant contributions to the realization of the Linac4. These are some among the responsibilities held by the IS section in the frame of the injector complex upgrade.