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Construction and performance of the lead-scintillating fiber calorimeter prototypes for the KLOE detector
30 Jan 1995-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment (North-Holland)-Vol. 354, Iss: 2, pp 352-363
TL;DR: The KLOE detector is designed primarily for the study of direct CP violation in K0 decays as mentioned in this paper. But it is not suitable for the measurement of the electromagnetic calorimeter, which is the most demanding element of the detector.
Abstract: The KLOE detector is designed primarily for the study of direct CP violation in K0 decays. The electromagnetic calorimeter, EmC, is a most demanding element of the detector. Two prototypes of the EmC (one for the barrel and one for the end-cap region) have been built at Frascati and tested at PSI (Switzerland) using beams of electrons, muons and pions of 40 to 290 MeV/c momentum, and at the Frascati LADON facility using photons of 20 to 80 MeV. We observe excellent linearity from 20 to 290 MeV. The energy resolution is σ(E)/E ∼ 4.4% / ”E(GeV) and the time resolution is ∼ 34 ps/”E(GeV). We found little dependence on incidence angle and entry position. We also determined that some πμ identification is possible.
Citations
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TL;DR: The e+ e− Φ-factory DAΦNE is now under construction at the Laboratori Nazionali di Frascati of the INFN.
Abstract: The e+ e− Φ-factory DAΦNE is now under construction at the Laboratori Nazionali di Frascati of the INFN. DAΦNE has been designed primarily forCP violation measurements and other symmetry studies. The general purpose detector, KLOE, being built for performing this physics program, is described and its current program is discussed.
01 Feb 1998
TL;DR: The KLOE electromagnetic calorimeter mass production is described in this article, where a test stand was set up to use cosmic rays for quality control and first calibrations of the modules produced in mass construction.
Abstract: Test beam results of a full scale barrel prototype of the KLOE electromagnetic calorimeter satisfied the experimental requirements, so initiating the calorimeter mass production. At the Frascati National Laboratory of INFN a test stand was set up to use cosmic rays for quality control and first calibrations of the modules produced in mass construction. The results show that the fibers and photomultipllers performances exceed our expectations. Combining cosmic rays and test beam measurements a time resolution of 55 ps/√E(GeV) and an energy resolution of 4.7%/√E(GeV) are expected for electromagnetic showers. The end of modules assembling and calibration is foreseen for the early 1997.
References
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193 citations
01 Sep 1990-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, prototypes for a new type of calorimeter, intended for the detection of both electromagnetic (em) and hadronic showers, muons and missing energy (eg neutrinos) at high-luminosity multi-TeV pp colliders, were tested.
Abstract: In the framework of the LAA project, prototypes for a new type of calorimeter, intended for the detection of both electromagnetic (em) and hadronic showers, muons and missing energy (eg neutrinos) at high-luminosity multi-TeV pp colliders, were tested The detector consists of scintillating plastic fibres embedded in a lead matrix at a volume ratio 1:4, such as to achieve compensation The optimization of the construction of the detector modules is described, as well as the performance concerning em shower and muon detection and e/π separation We used electron, pion and muon beams in the energy range 10–150 GeV for this purpose
For the energy resolution of electrons we found 13%/trE, with a constant term of 1% The signal uniformity was better than 3% over the total surface of projective modules The signal linearity for em shower detection was better than 1%, and the e/π separation was better than 5 × 10−4 for isolated particles Channeling effects are negligible, provided that the angle between the incoming particles and the fibre axis is larger than 2°
76 citations
48 citations
15 Sep 1990-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the average resolution of these detectors is determined to be σ/E ≈ 6.3%/√E (GeV) using a 300-element array of such modules.
Abstract: Electromagnetic calorimeter modules based on a uniform array of plastic scintillating fibers embedded in a lead alloy have been built and tested. Techniques have been developed to assemble large volumes of this composite material and to machine it into the tapered trapezoidal modules appropriate for modern, hermetically-sealed calorimeters with pointing geometry. Using this technique, a 300-element array of such modules has been built and instrumented. Prototypes and subsets of the larger array have been tested in electron and photon beams ranging in energy from 0.035 to 5.0 GeV. Improvements in fiber characteristics, assembly procedures, and geometrical optimization have led to substantial performance gains over previous similar detectors. The average resolution of these detectors is determined to be σ/E ≈ 6.3%/√E (GeV). The techniques of fabrication and the detector tests are described.
47 citations
CERN1
01 Jul 1987-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The Omega Inner Calorimeter as mentioned in this paper is a dense electromagnetic calorimeter made of scintillating fibres embedded in grooved Pb sheets or similar configuration, which is entering its third year of successful operation.
Abstract: Dense electromagnetic calorimeters made of scintillating fibres embedded in grooved Pb sheets or similar configuration are described. The Omega Inner Calorimeter is entering its third year of successful operation. Some future prospects are discussed.
25 citations