Title :
Progress in the development of the DTMROC time measurement chip for the ATLAS Transition Radiation Tracker (TRT)
Author :
Alexander, C. ; Anghinolfi, F. ; Dressnandt, N. ; Ekenberg, T. ; Farthouat, Ph ; Keener, P.T. ; Lam, N. ; La Marra, D. ; Mann, J. ; Newcomer, F.M. ; Ryjov, V. ; Soderberg, M. ; Szczygiel, R. ; Tikhomiro, V. ; Van Berg, R. ; Williams, H.H.
Author_Institution :
Dept. of Phys., Pennsylvania Univ., Philadelphia, PA, USA
fDate :
6/1/2001 12:00:00 AM
Abstract :
A 16-channel digital time-measurement readout chip (DTMROC) has been fabricated in TEMIC corporations 0.8-μm DMnL BI-CMOS SOI radiation-hard process for the Large Hadron Collider´s (LHC) Transition Radiation Tracker (ATLAS/TRT) at CERN, the chip receives discriminated straw-drift-tube signals from bipolar amplifier-shaper-discriminator chips (ASDBLR), measures the arrival time in 3.125-ns increments (±1 ns), and stores the data in a pipeline for 3.3 μs. A trigger signal (L1A) causes the data to be tagged with a time stamp and stored for readout. Up to 13 events may be stored in an on-chip buffer while data is being clocked out in a 40 MHz serial stream. The chip has been designed to function after exposure to 1×1014 protons/cm2 and 1.0 Mrad total dose. System beam-tests have demonstrated measurement of track positions with a resolution of 165 μm and high efficiency at rates up to 18 MHz
Keywords :
BiCMOS digital integrated circuits; nuclear electronics; readout electronics; time measurement; transition radiation detectors; 0.8 micron; 1 Mrad; 3.3 mus; ATLAS; DTMROC; Transition Radiation Tracker; resolution; time measurement chip; time-measurement readout chip; track position; Buffer storage; Clocks; Large Hadron Collider; Pipelines; Position measurement; Protons; Semiconductor device measurement; Signal processing; Time measurement; Variable speed drives;
Journal_Title :
Nuclear Science, IEEE Transactions on
