The effort at the UB and CNM to study the feasibility of using standard CMOS technology Geiger avalanche photo-diodes (GAPDs) for pixel tracking detectors is reported. Generally APDs are used as ...photon detector devices. The possibility of using APDs in Geiger mode (that is reverse-biased above breakdown) for direct particle detection is the purpose of the ongoing R&D program, which tries to exploit GAPDs’ features suitable for particle detection.
Pulseshape simulations for the SPD subdetector of LHCb Aguiló, E.; Calvo, M.; Deschamps, O. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2006, 2006-1-00, Letnik:
556, Številka:
1
Journal Article
Recenzirano
A Monte Carlo simulation to study the signal temporal shape of the LHCb Scintillator Pad Detector (SPD) and the Preshower (PRS) subdetectors is presented. Being a full simulation too slow to tune the ...free parameters related to some unknown properties of the detector, a fast Monte Carlo simulation is introduced. The pulseshape information is needed for the LHCb experiment general Monte Carlo simulation (Gauss) and it is extracted from this fast simulation. The approach presented here can be easily extended and used over similar geometrical configurations.
The LHCb experiment (The LHCb Technical Proposal, CERN/LHCC 98-4) is designed to study B meson physics in the LHC proton–proton collider at CERN. The Scintillator Pad Detector (SPD) has been designed ...to complete the calorimeter information performing an
e
/
γ
identification for the experiment level-0 trigger system. The detection technology consists in transmitting scintillation light by means of both Wavelength Shifting and clear fibers to fast multi-anode photomultiplier tubes. In this paper, it is described the instrumentation and setup used to characterize the baseline photomultiplier solution (Hamamatsu R5900-00-M64) together with the scintillators and optical fibers for the SPD at LHCb.
Backsplash testbeam results for the SPD subdetector of LHCb Aguiló, E.; Ballabriga, R.; Calvo, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2005, Letnik:
546, Številka:
3
Journal Article
Recenzirano
The Scintillator Pad Detector (SPD) of the LHCb experiment
1 is positioned just before the preshower subdetector (PS), in front of the electromagnetic calorimeter (ECAL). It has been designed to ...complete the calorimeter information performing an
e
/
γ
identification for the experiment level-0 trigger system. Backscattered particles produced in the PS and the ECAL might introduce inefficiencies in the
e
/
γ
separation performed by the SPD. A testbeam with electrons and pions, at different energies, has allowed an experimental study of this effect.
Mass characterization of MaPMT tubes for the LHCb scintillator pad detector Graugés, Eugeni; Comerma, Albert; Garrido, Lluís ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2007, Letnik:
572, Številka:
1
Journal Article
Recenzirano
The final choice as the photomultiplier solution for both the LHCb Pre-Shower (PS) and the Scintillator Pad Detector (SPD) are the R7600-00-M64MOD Hamamatsu 64 channel photomultiplier tubes (MaPMT). ...A total of 220 units have been purchased to the manufacturer and around 100 units, the part corresponding to the SPD, have been characterized at the photon detection test bench facility in the University of Barcelona (UB) high energy physics group laboratory. There, the crucial features of the tubes such as linearity, gain, channel cross-talk and anode uniformity of response have been measured to ensure the compliance with the specifications agreed with the manufacturer.
The current mode line terminating input stage of an integrated circuit for the upgrade of the LHCb calorimeter front end electronics is presented. The circuit is based on a current mode input stage ...followed by two fully differential interleaved channels, namely a switched integrator and a track and hold. The input stage employs a novel electronically cooled input termination scheme to achieve stringent noise requirements. Compared to previous designs, its novelty relies in the use of two current feedback loops to decrease and control the input impedance of a common base stage. Two prototypes in Austriamicrosystems SiGe BiCMOS 0.35 μm technology have been designed and tested. Key measurements have been performed. Reflection coefficient is smaller than 0.5% for the full dynamic range, which is 12 bits. Relative linearity error is below 1%. Output noise is about 1 LSB after applying correlated double sampling.
The calibration and performance of the LHCb Calorimeter system in Run 1 and 2 at the LHC are described. After a brief description of the sub-detectors and of their role in the trigger, the ...calibration methods used for each part of the system are reviewed. The changes which occurred with the increase of beam energy in Run 2 are explained. The performances of the calorimetry for \(\gamma\) and \(\pi^0\) are detailed. A few results from collisions recorded at \(\sqrt {s}\) = 7, 8 and 13 TeV are shown.
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