Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 44: Instrumentation X

HK 44.6: Vortrag

Donnerstag, 13. März 2025, 15:15–15:30, SR Exp1B Chemie

Recent achievements with the FRS DAQ upgrade — •Nicolas Hubbard for the Super-FRS Experiment collaboration — GSI, Darmstadt, Germany

The FRS (FRagment Seperator) is a high-resolution magnetic spectrometer located at the GSI Helmhholtzzentrum fur Schwerionenforschung in Darmstadt, Germany. Using the FRS secondary beams of exotic nuclei can be produced by impinging high energy primary beams from the SIS-18 synchotron onto production targets. These secondary beams are identified with the FRS using the Brho-dE-TOF method, using a variety of particle detectors. As the desired nuclei get more and more exotic, one of the limiting factors in identification of produced particles is due to the data acquisition (DAQ), which necessarily takes some time to digitise and read-out detector signals (the so-called dead time). Recently the FRS DAQ system has been upgraded to use a new FPGA-based VME controller from Mesytec, MVLC, which enables faster detector read-out and lower latency processing, in addition to conversion time and related read-out optimizations. Last year test measurements were performed with beam to accurately measure the dead time and acquisition rate of the improved DAQ system under real conditions. This talk will discuss the results from these test measurements and the resulting improvements to the maximum acquisition rate of the FRS.

Keywords: DAQ; Fragment Seperator; FPGA; MVLC; Secondary Beams