The lead-liquid argon sampling calorimeter of the SLD detector (original) (raw)
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Some Issues Associated with Design of Hadron Zero-Degree Calorimeter for Multi-Purpose Detector
Assessments of the accumulated doses of radiation (ADRs) for hadron Zero Degree Calorimeter (ZDC) projected in the composition of MultiPurpose Detector (MPD) are obtained for the design luminosity of NICA (Nuclotron-based Ion Collider fAcility), approved for implementation in Joint Institute for Nuclear Research (JINR, Dubna). This allowed us to assess effects of ADRs on plastic scintillators of ZDC. This also addresses of issues related to systems of control and calibration of electronics and sensors of ZDC, which are important for production of reliable and easy to use detector.
Beam tests of the DØ uranium liquid argon end calorimeters
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 1993
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 15 .7%/F and constant term of 0 .3% . The hadronic sampling resolution is 45%/F (degraded to 50%o/FE by the effects of upstream material) and the constant term is 4% . The calorimeter is linear to 0 .5%, and the electromagnetic to hadronic response ratio is between 1 .02 and 1 .09 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 .
1996
The first combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 20 to 300 GeV at an incident angle of about 11 is well-described by the expression =E =46:5 6:0= p E + 1 : 2 0 : 33:20:4 GeV=E. Shower profiles, shower leakage, and the angular resolution of hadronic showers were also studied.
The CALICE hadron calorimeters - beam test results and new developments
Proceedings of European Physical Society Europhysics Conference on High Energy Physics — PoS(EPS-HEP 2009), 2010
We present concepts and beam test results of highly granular calorimeter prototypes optimized for the application of particle flow algorithms. A scintillator-steel hadron calorimeter using SiPMs as photodetectors (AHCAL) has been tested in electron and hadron beams at CERN and Fermilab in the energy range 1-80 GeV. More than 7600 SiPMs-the highest number ever used-performed well over the period longer than 2 years and did not show an increase of noise. The analysis of the first part of data from hadron beams leads to the energy resolution of 61%/√E which can be further improved to 49%/√E applying energy dependent weights. The data on the longitudinal and transverse shower shapes allow discriminate among hadronization models of GEANT4. Specifically QGSP_BERT and LHEP prediction were compared to the data. Further we present the concept of a Digital Hadron Calorimeter (DHCAL) with two lines of R&D following different read-out and integration approach. Both are based on glass resistive pad chambers with 1 cm 2 pad read-out, alternative amplification techniques like GEMs or MICROMEGAS are also being considered. One series of studies applies a single threshold (1bit) to the signal charges, providing digital readout with the front end part integrated on the pad board. We report on the measurements with a small scale prototype in the Fermilab test beam using muons, positrons, pions, and protons and in the laboratory using cosmic rays. An alternative approach is to use semi-digital readout electronics following a design close to the ILD detector concept. The electronics will not require active cooling and rely on power-pulsing. A small prototype was built and tested with success at the CERN PS test beam in 2008. A few GRPCs as large as 1 m 2 were built with emphasis on minimized dead zones and optimized gas flow. The GRPCs were tested with an electronics board of the same size, containing 144 64channel ASICs, representing the largest ever built chamber with embedded electronics. The results will serve as the basis for the design of the fully instrumented 1 m 3 CALICE test beam digital calorimeter.