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The ALEPH minivertex detector

: Holl, P.; Dietl, H.; Fent, Jürgen; Lutz, G.; Sedlmeier, J.; Settles, R.; Strüder, L.; Buttler, Werner; Hosticka, Bedrich J.; Zimmer, Günter; Bagliesi, G.; Batignani, G.; Focardi, E.; Forti, F.; Giorgi, M.A.; Scapellato, S.; Tonelli, G.; Triggiani, G.

Nuclear instruments and methods in physics research, Section A. Accelerators, spectrometers, detectors and associated equipment 257 (1987), Nr. 3, S.587-590
ISSN: 0167-5087
ISSN: 0168-9002
Topical Seminar on Perspectives for Experimental Apparatus at Future High-energy Machines <2, 1986, San Miniato>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer IMS ()

Vertex detectors allow high precision reconstruction of particle tracks and therefore make possible the investigation of the decay topology of short-lived particles in collider experiments.
In the ALEPH experiment at LEP a minivertex detector will be installed. It consists of silicon microstrip detectors arranged on two concentric "cylindrical" surfaces around the interaction point. With this geometry it will be possible to measure the r - phi - z coordinates of particles traversing the detector. The expected position resolution is 10 µm in r - and 20 µm in r - z.
For optimum signal processing monolithic CMOS readout electronics are under development. Each chip consists of 60 charge sensitive preamplifiers, multiplexed into one output channel. Fast power switching will reduce heat dissipation.
Details about construction and expected device performance will be described.