Cern document server access articles, reports and multimedia content in hep. The upgrade of the lhcb experiment, planned for 2018, will. View and download minelab safari instruction manual online. The primary goal of lhcb is to search for indirect evidence of new. The lhcb detector is a forward spectrometer at the large hadron collider lhc at cern. Lhcb detector performance the lhcb collaborationy abstract the lhcb detector is a forward spectrometer at the large hadron collider lhc at cern. Rare decays in lhcb diego martnez santos,a, on behalf of the lhcb collaboration european organisation for nuclear research cern, geneva, switzerland. The lhcb detector is being constructed to measure cpviolation parameters and rare b decays. Links pointing to the original information ensure that all information is still available. Software for the lhcb experiment cern document server. Thesis a triplegem detector for the muon system of. Brun, zebra reference manual, program library q100, cern. Lhcb is a specialized bphysics experiment, designed primarily to measure the parameters of cp violation in the interactions of bhadrons heavy particles containing a bottom quark.
We envisage this upgrade to enable the lhcb experiment to operate at 10 times the design luminosity, i. To find them, the velos 42 silicon detector elements must be positioned perilously close to the point where protons collide, at a. It consist of a first phase where the events are generated e. Here we present an expression of interest of the lhcb collaboration for an upgrade of the lhcb detector after it will have collected a data sample of about 10 fb. The architecture of the lhcb software system includes its logical and physical structure which has been forged by all the strategic and tactical decisions applied during. The lhcb detector is a singlearm forward spectrometer covering the pseudorapidity range 2 detector includes a highprecision tracking system consisting of a siliconstrip vertex detector surrounding the pp interaction region, a largearea siliconstrip detector located upstream of a dipole magnet with a bending. Sep 26, 2002 an overview of the design of the vertex detector of the lhcb experiment in the future large hadron collider at cern will be given. The final optimised lhcb setup is used to study the physics performance of lhcb for the bsdsk and bsdspi decay channels. This workshop will discuss and further develop this longterm programme, aimed at both lhcb upgrade 1b run 4 and upgrade ii run 5 and 6. The vacuum system of the lhcb vertex detector sciencedirect. Lhcb detector status, lhcb commissioning, lhcb higgs pacs. The lhcb tracking system consists of silicon microstrip detectors and straw chambers.
The silicon tracker, which is placed close to the beam pipe, uses silicon microstrip detectors to detect passing particles. The lhcb experiment is dedicated to precision measurements of cp. The lhcb detector university of oxford department of physics. It is shown that the design criteria of the experiment. Lhcb 1 is an experiment being constructed at cerns lhc accelerator for the purpose of studying precisely the cp violation parameters in bmeson decays by detecting many final states. Service other services histogram service persistency service data files transient histogram store application manager. The experiment is dedicated to the study of subtle differences between matter and antimatter and to the searches for new physics through the ultrafast decays of particles produced in high energy protonproton collisions. Jan 20, 2014 a measurement of the inclusive z to ditau crosssection using 1. The lhcb detector at the lhc iopscience institute of physics. The decay products of b mesons are identified and measured by different detector components. Dirk wiedner early physics with the lhcb detector the k separation is achieved by two ring imaging cherenkov detectors. Selection and processing of calibration samples to measure.
The main goals of a detector safety system dss for the experiments at the lhc are to protect the experiment, with that the investment into it, and to avoid situations leading to alarmsoflevel3 in order to increase the running time of the experiment. Lhcbcomputing detector readout board wireshark dissectors for dummies christina quast lhcb openlab summer student 2015 supervisor. Torch cherenkov and timeofflight pid detector for the. A series of sub detectors surrounding the collision point stretch 20 meters 65. Eddy jans nikhef on behalf of the lhcb collaboration design of sub detectors, trigger and daq performance. Development of the inner tracker detector electronics for lhcb.
The lhcb detector is a forward singledipole spectrometer, consisting of a microvertex detector, a tracking system, aerogel and gas rich detectors. The application of silicon detectors close to the beam implies the isolation of the materials with a high desorption rate from the accelerator vacuum. Reconstructed final states containing two muons, a muon and an electron, a muon and a charged hadron, or an electron and a charged hadron are selected as candidates. The lhcb detector at the lhc article pdf available in journal of instrumentation 308. Lhcb detector performance international journal of. Electroweak and higgs measurements using tau final states. Further information can be found on the microdst page. Lhcb, gaudi, framework, geometry, xml 1 introduction one category of data objects identi. Construction of the vertex detector will have commenced by the start of 2003. Lhcbcomputing lhcb dst format to store all information about the particles of interest. The current lhcb detector is limited by design to a readout rate of 1. Lef t singlenoise ratio fo r an itmodule as function of the trigger d elay. Lying on either side of lhcbs powerful magnet, the detectors are positioned to intercept particles flying at different speeds and angles. Design and performance of the lhcb trigger and full realtime reconstruction in run 2 of the lhc lhcb collaboration the lhcb collaboration has redesigned its trigger to enable the full offline detector reconstruction to be performed in real time.
The lhcb collaboration prepared an expression of interest in 2017 and a physics case in 2018 for an lhcb upgrade ii, aiming at a full exploitation of the flavour physics potential of the hllhc. To find them, the velos 42 silicon detector elements must be positioned perilously close to the point where protons collide, at a distance of just five millimetres. The detector s easytouse control ensure you get the most from your safari, we panel enables anyone, from beginner to recommend that you read this instruction expert, to start detecting immediately after manual to help assemble, take. Signals from the detector are transported outside the vacuum system for analysis through 22,000 cables. The lhcb experiment has collected an unprecedented data sample to investigate beauty and charm hadrons decays. The 5600tonne lhcb detector is made up of a forward spectrometer and planar detectors. This provides charged particle identification over a wide momentum range, from 2100 gevc. Two of the four conductive layers of the flex circuit are used for digital. Posvertex 2012047 performance of the lhcb tracking detectors mark tobin 2 1. Test of the photon detection system for the lhcb rich. The lhcb detector 19, 20 is a singlearm forward spectrometer covering the pseudorapidity range 2 detector performance papers.
Lhcb detector and performance neville harnew at end of the 2010 lhc running period, the peak instantaneous luminosity was almost at the design value of 2. An evolved realtime data processing strategy is proposed for highenergy physics experiments, and its implementation at the lhcb. The ability to reconstruct the b production and decay vertices is vital to our physics program. It consists of twelve planes of 6m width and 5m height see fig. About 700 scientists from 66 different institutes and universities make up the lhcb collaboration october 20.
Studies on this subject are particularly exciting, as they may open a window to physics beyond the sm. In this paper the performance of the various lhcb sub detectors and the trigger. Lhcb detector performance papers cern document server. Nuclear instruments and methods in physics research section a. The lhcb upgrade therefore involves replacement of the complete tracking system. Comprehensive testing of the full assembly is anticipated in 2004 prior to the detector insertion.
One of its key detector components is the ringimaging cherenkov rich system. Search for massive longlived particles decaying semileptonically in. Protons arriving from the left and right collide in the vertex detector yellow, on the far left which is the most precise vertex detector at the lhc. Like velo, the experiments two rich detectors are built for particle identification. The lhcb large hadron collider beauty experiment is one of eight particle physics detector experiments collecting data at the large hadron collider at cern. The herschel detector consists of a set of scintillating counters, designed to increase the coverage of the lhcb experiment in the.
Closest to the protonproton interaction region is the vertex detector. Accelerators, spectrometers, detectors and associated equipment. The lhcb spectrometer is designed with special emphasis on the discovery potential of b and cphysics studies. The lhcb detector probes the forward rapidity region which is only partially covered by the other lhc experiments, and triggers on particles. The operation and control, software, and online monitoring of the rich system are described.
A wireshark based verification tool for the new lhcb common detector readout board wireshark dissectors for dummies. The lhcb detector has a silicon vertex detector around the interaction region. One of its key detector components is the rich system providing excellent particle identification pid over a wide momentum range 2100 gevc. Torch is a largearea precision timeofflight detector, based on cherenkov light production and propagation in a quartz radiator plate, which is read out at its edges. The experiment is designed for precision measurements of cp violation and rare decays of beauty and charm hadrons. The lhcb detector at the large hadron collider springerlink. The aim of the lhcb experiment is to record the decay of particles containing b and antib quarks, collectively known as b mesons. Torch is proposed for the lhcb experiment at cern to provide positive particle identification for kaons, and is currently in the researchanddevelopment phase.
Cern document server lhcb detector performance papers. Detector store message service joboptions service particle prop. Lhcb detector status, lhcb commissioning, lhcb higgs. The design, manufacture and testing of lightweight carbon fiber reinforced polymer cfrp converging spherical mirrors for the rich1 cherenkov detector of lhcb are described. May 15, 20 the lhcb experiment has been taking data at the large hadron collider lhc at cern since the end of 2009. The velos job is to pick out b mesons from the multitude of other particles produced a tricky task as their short lives will be spent close to the beam. Zero suppression and cluster finding occurs on tell1 boards behind the radiation shield. Pdf the lhcb detector is a forward spectrometer at the large hadron collider lhc at cern. Lightweight cfrp spherical mirrors for the lhcb rich1. The lhcb detector 19, 20 is a singlearm forward spectrometer covering the pseudorapidity range 2 detector at the lhc article pdf available in journal of instrumentation 308. In this paper the performance of the various lhcb subdetectors and the. The lhcb collaboration, a augusto alves jr 1, l m andrade filho1, a f barbosa 1, i bediaga1, g cernicchiaro1, g guerrer1, h p lima. Fy introduction lhcb is the large hadron collider experiment for precise measurement of cp violation and rare decays of beauty.
A measurement of the inclusive z to ditau crosssection using 1. Lhcb is one of four large experiments at cerns large hadron collider. The experiment is designed for precision measurements of cpviolation and rare decays of beauty and charm hadrons. The lhcb detector status and commissioning is presented. The lhcb experiment is situated at one of the four points around cerns large hadron collider where beams of protons are smashed together, producing an array of different particles. Detector lhcb large hadron collider beauty experiment.
Lhcbsimulation lhcb simulation software, built on the gaudi framework. Overview the scifi tracker is part of the lhcb upgrade to be installed in 201819 1. It is 21 metres long, 10 metres high and metres wide, and sits 100 metres below ground near the village of ferneyvoltaire, france. Detector module design, construction and performance for. The lhcb detector model designed by nathan readioff vertex locator rich1 magnet electromagnetic rich2 calorimeter muon chambers main tracker hadronic calorimeter lhcb is a particle detector at the large hadron collider lhc in cern that has been specially designed to investigate the slight differences between the properties of matter and. The system is composed of four major sub detectors. The velo is the main tracking device before the magnet and its data are heavily used in the trigger. Lhcbs tracking system consists of a series of four large rectangular stations, each covering an area of about 40 m two different detector technologies are employed.
The current siliconstrip vertex locator velo will give way to a stateoftheart siliconpixel detector with fast 3d vertex reconstruction capability. The silicon vertex locator for the lhcb upgrade sciencedirect. The lhcb collaboration, a augusto alves jr 1, l m andrade filho 1, a f barbosa 1, i bediaga 1, g cernicchiaro 1, g guerrer 1, h p lima. The different particle species produced in the highenergy collision are identified using two ringimaging cherenkov detectors. Cern european laboratory for particle physics, ch1211, geneva 23, switzerland. Dzhelyadin, on behalf of the lhcb collaboration cern, geneva, switzerland and ihep, protvino, russia available online 6 august 2007 abstract the calorimeter detectors constructed for the lhcb experiment are being described. Since the completion of the lhcb detector, it has extensively been commissioned with cosmic rays, simulated data, beam and beaminduced. The layout of the lhcb detector, with a picture of a construction worker for scale.
The large hadron collider lhc evans, the lhc machine, pos epshep2009 004, 2009 is a synchrotron particle accelerator with a circumference of 27 km located about 100 m underground at cern in the surroundings of geneva, switzerland. An emphasis is made on the performance study both using cosmic particles and with a test. Lhcb aims to be ready for the start of lhc running, which is planned for 2005. The lhcb experiment is situated at one of the four points around cerns large hadron collider where beams of protons are smashed together, producing an array of different particles how does it work. Welcome to the public pages of the lhcb velo project. Lhcb is an experiment at the cern lhc dedicated to beauty and charm hadron physics.
Optimisation of the lhcb detector cern document server. Cern lhcb dp2012003 september 18, 20 performance of the lhcb rich detector at the lhc the lhcb rich group1 abstract the lhcb experiment has been taking data at the large hadron collider lhc at cern since the end of 2009. Home cern experiments lhc experiments lhcb lhcb detector performance papers the lhcb detector at the. S08005 august 2008 with 199 reads how we measure reads. Development of the inner tracker detector electronics for lhcb a.
The lhcb experiment has been taking data at the large hadron collider lhc at cern since the end of 2009. In this paper the performance of the various lhcb subdetectors and the trigger system are described, using data taken from 2010 to 2012. Detector module design, construction and performance for the lhcb scifi tracker robert ekelhof 1. The lhcb detector is a forward spectrometer at the large hadron collider lhc. A triplegem detector for the muon system of the lhcb experiment davide pinci advisors. Pdf the lhcb detector is a forward spectrometer at the large hadron. In this paper the performance of the various lhcb sub detectors and the trigger system are described, using data taken from 2010 to 2012. Next is the large hadron collider beauty lhcb detector site. This means that while the detector only covers around 4% solid angle, it is able to measure around 40% of b meson production. The lhcb detector 19, 20 is a singlearm forward spectrometer covering the pseudorapidity range 2 download fulltext pdf. It does this by searching for a particle called the beauty quark. In order to design and implement the lhcb control system we have the following resources. Introduction 3 the lhcb experiment 1 is a single arm spectrometer designed to study heavy.
The purpose of the lhcb is to search for evidence of antimatter. Times new roman symbol tahoma wingdings default design unknown lhcb vertex detector and beetle chip the lhcb vertex locator velo vertex locator rf shielding pileup trigger veto frontend chip requirements radiation hardness of cmos radiation hardness2 beetle functional diagram beetle frontend layout of beetle radiation hardness test. However this luminosity was delivered in only 344 colliding bunches i. The performance of the detector is presented based on data of the lhc run 2 running period from 2015 and 2016. May 21, 2010 the lhcb experiment at the large hadron collider has been optimised for high precision measurements of the charm and beauty quark sector. Eddy jans nikhef on behalf of the lhcb collaboration design of subdetectors, trigger and daq performance.
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