Author/Authors :
Albrecht، نويسنده , , H. and Bahte، نويسنده , , M. and Bauer، نويسنده , , Th.S. and Beck، نويسنده , , M. and Berkhan، نويسنده , , K. and Bohm، نويسنده , , G. M. Bruinsma، نويسنده , , M. and Buran، نويسنده , , T. and Capeans، نويسنده , , M. and Chen، نويسنده , , B.X. and Deckers، نويسنده , , H. and Dong، نويسنده , , X. and Eckmann، نويسنده , , R. and Emelianov، نويسنده , , D. and Evgrafov، نويسنده , , G. and Golutvin، نويسنده , , I. and Hohlma، نويسنده ,
Abstract :
The HERA-B Outer Tracker is a large detector with 112,674 drift chamber channels. It is exposed to a particle flux of up to 2 × 10 5 cm - 2 s - 1 thus coping with conditions similar to those expected for the LHC experiments. The front-end readout system, based on the ASD-8 chip and a customized TDC chip, is designed to fulfil the requirements on low noise, high sensitivity, rate tolerance, and high integration density.
C system is based on an ASIC which digitizes the time in bins of about 0.5 ns within a total of 256 bins. The chip also comprises a pipeline to store data from 128 events which is required for a deadtime-free trigger and data acquisition system.
ort on the development, installation, and commissioning of the front-end electronics, including the grounding and noise suppression schemes, and discuss its performance in the HERA-B experiment.
Keywords :
TDC , Drift tubes , Readout electronics , HERA-B experiment , Drift chamber
