This paper presents the case for how students can be helped to increase their scientific vocation by experimental work and the introduction of particle physics into pre-university studies. These two ...ideas are the two main lines of work of the ADMIRA initiative, which has been created by individuals belonging to different and complementary educational and research institutions. The initiative consists of a network of schools that share Minipix devices, a readout system for the Timepix detector designed at CERN in the framework of the Medipix2 Collaboration. The schools receive logistical and technical support from the local University (the University of Barcelona) and from CERN. The centres involved and the objectives, as well as the characteristics of the project are presented. The technical and didactic materials available are also shown. Finally, some initiative data has been analysed to show its rapid growth, and some students' research is presented showing the diversity of tasks that can be done with such detectors.
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.
A fully differential ASIC with cooled input termination is presented as a solution for the Upgrade of the Calorimeter front end electronics. The LHCb experiment needs to increase about ten times the ...integrated luminosity in order to study new physics. The increase in signal has to be compensated reducing the gain of the photomultipliers which implies stringent noise requirements. The proposed solution offers an active termination at the input and avoids the noise originated by the use of a resistor. The circuit is based on a two interleaved channel with a first amplifier stage, a switched integrator, and a Track-and-Hold. Two prototypes have been implemented and tested in SiGe BiCMOS 0.35um technology.
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.
We study the processes (ProQuest: Formulae and/or non-USASCII text omitted) using a data sample of 519fb super(-1) recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e ...super(+)e super(-) collider at center-of-mass energies at and near the Upsilon(nS) (n=2, 3, 4) resonances. We observe eta super(c) decays to both final states and perform Dalitz plot analyses using a model-independent partial wave analysis technique. This allows a model-independent measurement of the mass-dependence of the I=1/2 KpiS-wave amplitude and phase. A comparison between the present measurement and those from previous experiments indicates similar behavior for the phase up to a mass of 1.5GeV/c super(2). In contrast, the amplitudes show very marked differences. The data require the presence of a new a0(1950) resonance with parameters m=1931+ or -14+ or -22MeV/c super(2) and Gamma=271+ or -22+ or -29MeV.
Using the eight time dependences e? super(Gammat)(1+C sub()icosDeltamt+S sub() isinDeltamt) for the decays Upsilon(4S)arrowrightB super(0)B super(0)arrowrightf sub(@)jfdk with the decay into a ...flavor-specific state f sub()jscriptl super(+ or -)X before or after the decay into a CP eigenstate f sub()kccK sub()S,Las measured by the BABAR experiment, we determine the three CPT-sensitive parameters Re(z) and Im(z) in B super(0)?B super(0) mixing and A/A in B super(0)arrowrightc cK super(0) decays. We find Im(z)=0.010+ or -0.030+ or -0.013, Re(z)=?0.065+ or -0.028+ or -0.014, and A/A=0.999+ or -0.023+ or -0.017, in agreement with CPT symmetry.
We perform the first measurement on the D super(0)- super( D) super(0) mixing parameters using a time-dependent amplitude analysis of the decay D super(0)arrowrightpi super(+)pi super(-)pi super(0). ...The data were recorded with the BABAR detector at center-of-mass energies at and near the Upsilon(4S) resonance, and correspond to an integrated luminosity of approximately 468.1fb super(-1). The neutral D meson candidates are selected from D*(2010) super(+)arrowrightD super(0)pi super(+) sdecays where the flavor at the production is identified by the charge of the low-momentum pion, pi sub()s super(+) The measured mixing parameters are x=(1.5+ or -1.2+ or -0.6)% and y=(0.2+ or -0.9+ or -0.5)%, where the quoted uncertainties are statistical and systematic, respectively.
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