Showing papers by "Allan G Clark published in 1993"
01 Jan 1993-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, the results of beam tests of three uranium-liquid argon calorimeter modules constructed for the DO detector at the Fermilab Tevatron collider were described.
Abstract: We describe the results of beam tests of three uranium-liquid argon calorimeter modules constructed for the DO detector at the Fermilab Tevatron collider As part of the calibration procedure, these modules were exposed to beams of electrons, pions and muons between 10 and 150 GeV/c before their installation in the end calorimeter of the completed DO detector We obtain an electromagnetic sampling resolution of 157%/√E and constant term of 03% The hadronic sampling resolution is 45%/√E (degraded to 50%/√E by the effects of upstream material) and the constant term is 4% The calorimeter is linear to 05%, and the electromagnetic to hadronic response ratio is between 102 and 109 over this range of momenta For an electron efficiency of 95% we obtain a rejection factor against pions of ∼ 900-3000 for particles in the momentum range between 50 and 150 GeV/c We also compare our results with the predictions of a detailed Monte Carlo simulation
31 citations
01 Mar 1993-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, measurements of the behavior of silicon diodes when exposed to integrated neutron doses of up to 5 × 10 13 neutron/cm 2 were made at diode temperatures between room temperature and −20°C.
Abstract: We report measurements of the behaviour of silicon diodes when exposed to integrated neutron doses of up to 5 × 10 13 neutron/cm 2 . The measurements have been made at diode temperatures between room temperature and −20°C. From measurements of the diode leakage current and depletion voltage, and consequent evaluations of the effective impurity concentration, the temperature dependence of these quantities is discussed in terms of the annealing behaviour of the diodes. Comments are made on the suitability of silicon as a detector medium for particle physics experiments at future accelerators.
18 citations
15 Nov 1993-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, a second level track trigger for the ATLAS detector is described, based on hit information from a silicon tracker, and detailed Monte Carlo simulations have been performed to assess the performance of the trigger in accepting electrons and in rejecting the QCD jets that would fake electrons in the first level calorimeter trigger.
Abstract: This paper discusses some of the problems of triggering at a high energy, high luminosity pp collider. A suggested second level track trigger for the ATLAS detector is described, based on hit information from a silicon tracker. Detailed Monte Carlo simulations have been performed to assess the performance of the trigger in accepting electrons and in rejecting the QCD jets that would fake electrons in the first level calorimeter trigger. Studies of the feasibility of implementing such a trigger are also presented.
6 citations
01 May 1993
TL;DR: In this article, the RD2 design for a silicon tracking detector is described and its function as an integrated component of an LHC experiment is discussed, showing the suitability of silicon as a detector for LHC experiments.
Abstract: We present a description of the RD2 design for a silicon tracking detector and discuss its function as an integrated component of an LHC experiment. An advantage of the design is that considerable flexibility is possible in the granularity and radial position of each plane; these parameters are determined by the physics requirements as well as by the radiation environment, engineering and electronics considerations. The simulated performance of the detector is discussed and our experimental investigations of irradiation effects are summarised. The development of an analogue pipe-line and related front-end electronics for the storage and processing of the signals is described. Our work indicates the suitability of silicon as a detector for LHC experiments.
1 citations