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Carlén, L.; Chenawi, K.El; Chujo, T.; Enosawa, K.; Garpman, S.; Gustafsson, H.-Å.; Kurata, M.; Kurita, K.; Löhner, H.; Martin, M.; Miake, Y.; Miyamoto, Y.; Naef, H.; Nilsson, P.; Nishimura, S.; Nystrand, J.; Oskarsson, A.; Österman, L.; Otterlund, I.; Perrin, E.; Rosselet, L.; Rubio, J.M.; Sako, H.; Sato, S.; Silvermyr, D.; Söderström, K.; Solomey, N.; Stenlund, E.; Svensson, T.; Vörös, S.; Yagi, K.; Yokota, Y.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 07/1999, Letnik: 431, Številka: 1Journal Article
A large acceptance tracking system, specially developed for tracking at very high particle densities encountered in ultra-relativistic heavy-ion collisions is described. The system is a combination of multi-step avalanche chambers equipped with electronic pad readout with high position resolution in two dimensions and streamer-tube detectors with pad readout, with coarser position resolution, that is sufficient for safe pattern recognition. A high-resolution time-of-flight system (time resolution better than 90 ps) provides particle identification up to 8 GeV/ c for pions and protons and pion/kaon separation up to 4 GeV/ c. All detectors in the tracking system are read out with new, high-performance integrated circuits. The system can operate at high event rates due to efficient zero suppression. The performance of the system for tracking under real running conditions with Pb-beam at 158 A GeV in the WA98 experiment at CERN is presented.
