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HK: Fachverband Physik der Hadronen und Kerne

HK 24: Instrumentation V

HK 24.4: Vortrag

Dienstag, 19. März 2019, 14:45–15:00, HS 11

Shadow Readout – Glowing VME Backplanes — Michael Munch¹, Jesper H. Jensen¹, •Bastian Löher^2,3, Hans T. Törnqvist^2,3, and Håkan T. Johansson⁴ — ¹Department of Physics and Astronomy, Aarhus University, Denmark — ²Institut für Kernphysik, Technische Universität Darmstadt, Germany — ³GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — ⁴Department of Physics, Chalmers University of Technology, Sweden

The accepted trigger rate of modular electronics (e.g. VME) is limited by the per-cycle deadtime. Conventional multi-event readout employs on-module multi-event-buffers to make DMA transfers feasible and reduce the average deadtime. In this talk a generic implementation of a shadow readout scheme is presented, which continuously empties the module buffers into local RAM. This method is capable of reducing the average dead-time to the limit of the module conversion time (few µ s) and allows accepted trigger rates beyond 100 kHz with conventional hardware. It has been used successfully during the last HIE-ISOLDE beam-time and is continuously running since April at the Aarhus 5MV Van de Graaff accelerator. ^*Supported by the GSI-TU Darmstadt cooperation agreement.