Experimental Aspects of Heavy Quark Physics at Hera

Abstract

HERA is the e — p collider now under construction at DESY, Hamburg. It will provide collisions between 30 GeV electrons and 820 GeV protons and is expected to become operational by 1990. Two detectors have been approved for data taking at HERA, H1 and ZEUS. A schematic layout of ZEUS is shown if Fig. 1.1. This figure illustrates the angular coverage of the high resolution calorimeter in the (w.r.t. the incoming p direction) forward (FCAL), central (BCAL) and rear (RCAL) directions. It also shows the position of the vertex detector (VXD), the central tracking device (CTD) as well as the forward and rear tracking chambers (FTD and RTD). The forward, barrel and rear calorimeters are planned to be instrumented with two planes of Si pads for improved electron/hadron separation. Muons are detected in the forward direction in a spectrometer using drift and limited streamer tube chambers plus scintillator counters interspersed between the magnetized iron yoke and toroid. The barrel and rear muon detectors are based on limited streamer tube chambers before, in between and behind the backing calorimeter and behind the concrete shield.

Alexander von Humboldt Fellow, now at DESY

Based on lectures given by F.B. at the VI ELOISATRON Workshop on Heavy Flavours, Erice, Italy