Bonn 2010 – wissenschaftliches Programm
HK 58.6: Vortrag
Donnerstag, 18. März 2010, 18:00–18:15, HG IX
A differential RPC prototype for CBM — •Ingo Martin Deppner and Norbert Herrmann — Physikalisches Institut Uni. Heidelberg, Heidelberg, Deutschland
The Compressed Baryonic Matter spectrometer (CBM) at FAIR aims to explore the properties of dense nuclear matter in relativistic heavy-ion collisions at incident energies between 2 and 45 AGeV. The key element providing hadron identification is a Time-of-Flight wall placed at a distance of 10m from the target covering the polar angular range from 2.5 - 25deg and full azimuth. A full system ToF resolution better then 80 ps is required to yield the necessary particle identification properties. In addition the detector has to cope with rates ranging from 20 kHz/cm2 at the center to 1 kHz/cm2 at the edge of the wall. For the time being, the most promising technological solution consists of a 150 m2 wall based on Multi-gap Resistive Plate Chambers (MRPC). The existing conceptual design foresees two regions where the outer-most part can be covered with float glass RPCs in a multi-strip configuration.
Based on the cosmic measurements and the in-beam tests we will present first results on the performance reached with a new fully differential multi-strip MRPC prototype with normal float glass developed at the Physikalisches Institut at University of Heidelberg. We will discuss the strip wise efficiency and cross talk of the prototype.
Supported by UE/FP7 WP2; BMBF 06HD190i.