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29 March 2024
 
  » arxiv » hep-ex/9707032

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The Design and Performance of the ZEUS Central Tracking Detector z-by-Timing System
D.S. Bailey ; R.C. Carter ; B. Foster ; N. Harnew ; G.P. Heath ; M.D. Jeffs ; T. Khatri ; M. Lancaster ; J.B. Lane ; I.C. McArthur ; J.D. McFall ; R. Milborrow ; C.J.S. Morgado ; M.C. Morrissey ; J. Nash ; G. Nixon ; D.A. Phillips ; M. Postranecky ; S.P.H. Quinton ; P.D. Shield ; S. Topp-Jorgensen ; G. Westlake ; D.J. White ; F.F. Wilson . ;
Date 18 Jul 1997
Journal Nucl.Instrum.Meth. A396 (1997) 320-349
Subject hep-ex
Affiliation University of Bristol, Rutherford Appleton Laboratory, University of Oxford, University College, London.
AbstractThe ZEUS Central Tracking Detector utilizes a time difference measurement to provide a fast determination of the z-coordinate of each hit. The z-by-timing measurement is achieved by using a Time-to-Amplitude Converter which has an intrinsic timing resolution of 36 ps, has pipelined readout, and has a multihit capability of 48 ns. In order to maintain the required sub-nanosecond timing accuracy, the technique incorporates an automated self-calibration system. The readout of the z-by-timing data utilizes a fully customized timing control system which runs synchronously with the HERA beam-crossing clock, and a data acquisition system implemented on a network of Transputers. Three dimensional space-points provided by the z-by-timing system are used as input to all three levels of the ZEUS trigger and for offline track reconstruction. The average z-resolution is determined to be 4.4 cm for multi-track events from positron-proton collisions in the ZEUS detector.
Source arXiv, hep-ex/9707032
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