Speaker
Description
The bunch-by-bunch and turn-by-turn beam trajectory measurement system of the CERN PS accelerator has been in operation for several years. To ensure long-term reliability, the consolidation of the analogue acquisition chain is foreseen during the upcoming LS3 long shutdown including a new architecture with improved performance, which is currently under test in the PS accelerator for final validation. The key element is a custom-designed high impedance head amplifier, replacing the 50Ω amplifier used by the current system, with the advantage of improving, at the same time, bandwidth, dynamic range and noise level. Increased dynamic range opens the possibility of measuring longer acceleration periods without gain switching and better resolution. Increased bandwidth allows the measurement of more beam configuration, in particular with shorter bunch to bunch distance. However, improved performances come at the expense of placing active electronics close to the beamline, in locations with significant radiation exposure, therefore requiring radiation-tolerant electronics. An overview of the PS trajectory system is presented, with the focus on the design of the new analogue acquisition, along with the preliminary bench and tunnel measurement results.
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