Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 6: Instrumentierung

HK 6.6: Vortrag

Montag, 17. März 2014, 15:15–15:30, HZ 8

Self-triggering readout system for the neutron lifetime experiment PENeLOPE — •Dominik Steffen for the PENeLOPE collaboration — Technische Universität München

Modern experiments permanently improve the precision of parameters in nuclear and particle physics. Besides high-performance detectors, state-of-the-art readout electronis and recent data acqusition systems contribute substantially to the increasingly better accuracy. This talk will therefore present the readout system, which is being designed for the neutron lifetime experiment PENeLOPE, currently under construction at Technische Universität München.

The system*s readout chain involves preamplifier, shaper, sampling ADC, and a data processing stage implemented on field programmable gate arrays (FPGAs). The FPGAs perform the task of online data analysis and formatting and are able to transfer data to a computer via a high-speed Ethernet connection. An advanced algorithm enables them to calculate the pedestal for every single channel online, and to reliably detect all signals above noise. Due to this incorporated signal detection, the triggerless system is able to process and to format pulse shapes from around 1,000 channels simultaneously, each of which is hit by 10 particles/sec. This corresponds to a data rate of 1.5 MB/sec, which is read out to a computer where the pulse shapes are available for further analysis. In the talk, performance and first tests of this readout system will be presented in detail.