Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Instrumentierung

HK 51.6: Vortrag

Donnerstag, 20. März 2014, 18:00–18:15, HZ 9

RPC test with heavy-ion beams — •Christian Simon and Norbert Herrmann for the CBM collaboration — Physikalisches Institut und Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg, Deutschland

The Time-of-Flight (ToF) wall of the Compressed Baryonic Matter (CBM) experiment, conceptualized on the basis of high-resolution timing Multi-gap Resistive Plate Chambers (MRPCs), is intended to account for concise hadron identification at an unprecedented event rate of 10 MHz in Au+Au collisions. Comprehensive performance tests of several purpose-built multi-strip MRPC prototypes forseen for different rate regions of the planned 120 m² ToF wall are an essential instrument to study the response and the limitations of the current design. Such evaluation studies were carried out both under SIS-18 heavy-ion beam load at GSI in the fall of 2012 and under cosmic irradiation in the lab throughout the year 2013. Particle flux conditions of up to a few tens of kHz/cm² as expected to impinge on the ToF wall in future CBM runs can be provided at the SIS-18 accelerator. A generic calibration scheme for MRPCs with strip read-out has been developed and will be described. Preliminary results concerning key characteristics like efficiency and timing resolution of a multi-strip MRPC demonstrator will be presented, as well as an outlook to the specifications and requirements of a planned high-rate in-beam test at GSI in 2014.
The project is partially funded by BMBF 05PRVHFC7 and by EU/FP7-HadronPhysics3/WP19.