Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 118: Trigger und DAQ 3

T 118.1: Gruppenbericht

Donnerstag, 30. März 2017, 16:45–17:05, VSH 05

BonnDAQ - DAQ Software for the Belle II Pixel Detector — Jochen Dingfelder, •Florian Lütticke, Carlos Marinas, and Norbert Wermes for the Belle II collaboration — Physikalisches Institut, Rheinische Friedrich-Wilhelms Universität Bonn

The future Belle II experiment at the SuperKEKB accelerator will feature 2 layers of ultra-thin DEPFET pixel detectors, consisting of multiple modules. A DEPFET is a P-channel Field Effect Transistor on a fully DEpleted bulk. Collected charge drifts into a potential minimum below the transistor gate, thus modulating the drain current. The readout current is digitized and zero suppressed on the module by multiple Application Specific Integrated Circuits (ASICs). The data is read out by the DHH (Data Handling Hybrid), an FPGA based readout system, which processes the data of several modules for further backend electronic during the experiment. For test data taking in lab setups, during beam tests and during local calibration runs in the final experiment, data can be transmitted directly to a computer by the DHH using the User Datagram Protocol (UDP). For receiving, checking and storing data the BonnDAQ software was developed. It features redistribution of data to Data Quality Monitoring (DQM) modules, an interface to the Belle II slow control system, lossless online data compression and integration into the EUDAQ Data Acquisition framework. Both C++ and Python modules are available for reading stored files as well as receiving live data. In this talk, the design choices and first performance measurements of the software are discussed and example results from its operation are presented.