Dortmund 2021 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 11: Diagnostics, Control and Instrumentation III

AKBP 11.3: Talk

Thursday, March 18, 2021, 17:00–17:15, AKBPa

New bunch by bunch filling-pattern measuring system at ELSA — Klaus Desch, Dennis Proft, and •Alexandra Wald — Physikalischer Institut, Universität Bonn, Deutschland

The electron accelerator facility ELSA at the University of Bonn can accelerate and store electrons with a final energy from 0.8GeV up to 3.2GeV. To determine the filling pattern in the storage ring a new measuring system is developed. For hadron physics experiments the filling pattern, which is influenced by the injection from the pre-accelerator (the Booster-Synchrotron), should be as homogeneous as possible. The new measurement system should provide a real-time measurement of the filling pattern, so that a continuous optimisation of the injection becomes possible.
To measure the intensity and the position bunch by bunch for all 274 bunches, the signals of the existing BPMs will be digitised by fast 12-bit ADCs synchronous to the 500MHz ELSA radio frequency. The fast pre-processing and intermediate storage of the data is realised with a 500MHz clocked FPGA and transfers the data to a PC for further processing.
The measurement can be verified by a streak camera, which in this case is not suitable for the continuous measurement. The method and first measurements will be presented.