Tübingen 2003 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 4: Instrumentation und Anwendungen I

HK 4.8: Talk

Monday, March 17, 2003, 17:45–18:00, C

ALICE TRD trigger performance from prototype tests — •Bogdan Vulpescu — Physikalisches Institut der Universität Heidelberg, Germany

The study of the electromagnetic probes in the single- and di-electron channels with the ALICE detector at LHC requires a good electron identification at large momenta. The Transition Radiation Detector extends the central tracking barrel between 2.98 m and 3.65 m from the beam line by 6 layers of radiators and drift chambers, providing a distinct signature of electrons with momentum larger than 1 GeV/c. Detecting rare signals of quarkonium production will be possible with significant statistics only if the TRD will be included in the L1 trigger level. Based on a fast tracking, momentum reconstruction and a rapid pion rejection, the online processing will be completed in about 6 µs after the interaction.

By analyzing the tests performed with prototype chambers at the CERN PS, one gets the understanding of the chamber functionality and performance [1], studies gas properties in detectors and characterizes transition radiation materials [2].

We present the analysis of the data with the online tracking scheme and compare with simulation results. For simulated minimum bias Pb-Pb collisions, we show the trigger rate and the integral number of Υ’s detected in one year of ALICE running.

This work is supported in part by the BMBF Contract Nr. 06HD953I.

[1] Oliver Busch, Tariq Mahmoud, this meeting

[2] Georgios Tsiledakis, Damian Bucher, this meeting