The ATLAS detector has been designed for operation at CERN's Large Hadron Collider. ATLAS includes a complex system of liquid argon calorimeters. The electronics for amplifying, shaping, sampling, ...pipelining, and digitizing the calorimeter signals is implemented on the Front End Boards (FEBs). This paper describes the design, implementation and production of the FEBs and presents measurement results from testing performed at several stages during the production process.
This paper describes the on-detector electronics of the ATLAS hadronic end-cap calorimeter (HEC). The electronics is operated in liquid argon; therefore attention is paid to its performance at low ...temperatures. The core of the electronics are Gallium Arsenide (GaAs) preamplifiers. We present design, layout and results of various tests of the preamplifier chips and summing boards. The calibration and signal cables have been studied under laboratory conditions and the signal distortion is modeled. All parts of the electronics have been produced, tested and assembled on the calorimeter modules. The summary of the commissioning tests is presented.
The ATLAS detector has been designed for operation at the Large Hadron Collider at CERN. ATLAS includes electromagnetic and hadronic liquid argon calorimeters, with almost 200,000 channels of data ...that must be sampled at the LHC bunch crossing frequency of 40 MHz. The calorimeter electronics calibration and readout are performed by custom electronics developed specifically for these purposes. This paper describes the system performance of the ATLAS liquid argon calibration and readout electronics, including noise, energy and time resolution, and long term stability, with data taken mainly from full-system calibration runs performed after installation of the system in the ATLAS detector hall at CERN.
Highly integrated readout electronics were developed and produced for the 182000 channels of the four TPCs of the NA49 heavy-ion fixed target experiment at the CERN SPS. The large number of channels, ...the high packing density and required cost minimization led to the choice of a custom electronics system. The requirements, the design and the performance of the electronics components are described.
The ATLAS detector has been designed for operation at CERN's Large Hadron Collider. ATLAS includes a complex system of liquid argon calorimeters. This paper describes the architecture and ...implementation of the system of custom front end electronics developed for the readout of the ATLAS liquid argon calorimeters.
Highly integrated Gallium Arsenide (GaAs) chips of preamplifiers and summing amplifiers have been exposed to high fluence of fast neutrons and
γ
-dose at the IBR-2 reactor in Dubna. A stable ...performance of the electronics has been demonstrated up to a fluence of
5
×
10
14
n
cm
-
2
and a
γ
-dose of 55
kGy. The radiation hardness tests confirm the applicability of the preamplifiers for more than 10 years operation in the ATLAS hadronic end-cap calorimeter at LHC.
This paper describes the on-detector electronics of the ATLAS hadronic end-cap calorimeter (HEC). The electronics is working in liquid argon; therefore the attention is paid to its performance at low ...temperatures. The calibration and signal cables have been studied in laboratory conditions and signal distortion is modeled. The core of the electronics are GaAs preamplifiers. We present the design, layout and measured characteristics of preamplifier chips and summing boards. The on-module signal distribution is also described. All parts of the electronics have been produced, tested and assembled on the calorimeter modules. The summary of commissioning tests is presented.
Nucl.Instrum.Meth.A531:481-514,2004 A full azimuthal phi-wedge of the ATLAS liquid argon end-cap calorimeter has
been exposed to beams of electrons, muons and pions in the energy range 6 GeV
<= E <= ...200 GeV at the CERN SPS. The angular region studied corresponds to the
ATLAS impact position around the pseudorapidity interval 1.6 < |eta| < 1.8. The
beam test set-up is described. A detailed study of the performance is given as
well as the related intercalibration constants obtained. Following the ATLAS
hadronic calibration proposal, a first study of the hadron calibration using a
weighting ansatz is presented. The results are compared to predictions from
Monte Carlo simulations, based on GEANT 3 and GEANT 4 models.
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