Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Instrumentation XI

HK 50.9: Vortrag

Donnerstag, 30. März 2017, 18:45–19:00, F 3

A parametric response model for the self-triggered MRPC readout scheme of the CBM time-of-flight system — •Christian Simon and Norbert Herrmann for the CBM collaboration — Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg

The design goal of the future Compressed Baryonic Matter (CBM) experiment is to measure rare probes of dense strongly interacting matter with an unprecedented accuracy. Target interaction rates of up to 10 MHz need to be processed by the detector. Compliant with the ambitious physics program a novel self-triggered digitization and readout scheme will be implemented for each subsystem of CBM. The time-of-flight (TOF) wall which should provide hadron identification at particle fluxes of up to a few tens of kHz/cm² is composed of high-resolution timing multi-gap resistive plate chambers (MRPCs). Due to the new readout paradigm, data analysis of in-beam tests of MRPC prototypes carried out with self-triggered electronics is accompanied by simulation efforts to model the detector response under these conditions. To avoid a computationally costly Monte Carlo treatment, the analog/digital response and load effects, i.e. the local breakdown and recovery of the electric field in the gas gaps, are parametrized. The model parameters are constrained by the requirement to reproduce measured quantities of the prototypes. A detailed description of the parametric response model will be given and its predictive power with respect to self-triggered detector data will be discussed. The project is partially funded by BMBF 05P2015 and by EU/FP7-HadronPhysic3/WP19.