Lhcb is one of four large experiments at cerns large hadron collider. 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. The lhcb detector 30, 31 is a singlearm forward spectrometer covering the pseudorapidity range 2 detector includes a. Introduction 3 the lhcb vertex detector velo will be upgraded in 2018 to a lightweight pixel detector 4 capable of 40 mhz readout to operate at higher luminosity x5 higher than the current and very 5 close 5. 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. Introduction the large hadron collider beauty experiment is designed to study the decay of b. Technical design report find, read and cite all the research you need on. Lhcb detector is a specialized detector for the study of bquark physics atlas. However this luminosity was delivered in only 344 colliding bunches i.
In this paper the performance of the various lhcb subdetectors and the trigger system are described, using data taken from 2010 to 2012. The detector itself is a manylayered instrument designed to detect some of the. This provides charged particle identification over a wide momentum range, from 2100 gevc. This page was last edited on 23 december 2019, at 09.
Performance of the lhcb rich detector at the lhc springerlink. The operation and control, software, and online monitoring of the rich system are described. Lhcb collaboration abstract we describe current status of the development of scintillator pad detector and preshower detector prototypes for the lhcb experiment at cern. The us groups are also currently constructing a new silicon tracking detector called the upstream tracker, which will help them bettersee the particles produced immediately after the collisions. Data driven simulation of cherenkov detectors using generative. Spdps consists of two identical layers of scintillator pads with a lead converter in between. Readout system for the phase i of the lhcb velo upgrade. The lhcb experiment has been taking data at the large hadron collider lhc at cern since the end of 2009. Grendel narrative essay stop getting bad grades with these custom essay advice get a 100% original, nonplagiarized essay you could only think about in our custom writing help top reliable and professional academic writing aid. Experimental performance of spdps detector prototypes. Pdf the large hadron collider beauty experiment lhcb, one of the four largest. The detector exploits prompt cherenkov light produced when charged particles traverse a 10mm thick quartz plate. The main purpose of the lhcb 1 experiment at the lhc 2 is to study indirect evidence of new physics in the beauty and charm sector.
A series of subdetectors surrounding the collision point stretch 20 meters 65. Lhcb chooses should be available from day one 2fb1 per year 107 second lhc machine had a problem with cryogenic plumbing, now resolved. It is fully integrated in the lhcb experiment control system ecs and it is being used routinely for the operation of the rich detectors. The ability to reconstruct the b production and decay vertices is vital to our physics program. Since 2005, us scientists have contributed to designing, building and testing the lhcb detector in addition to performing important data analyses.
Pdf lhcb reoptimized detector design and performance. Hes been known to challenge a tenuous claim by shouting in the middle of a colleagues talk. The lhcb outer tracker is a gaseous detector covering an area of 5. Form required by the french customs when entering france. Such studies can help to explain the matterantimatter. Converter algorithm event data service persistency service data files algorithm algorithm transient event store detec. Detector function the lhcb detector is a narrow angle particle detector which only used downstream data. Lhcb upgrade phase 1 upgrade all frontend detector electronics to 40 mhz readout by 2014, do not run in 20 nov 2012 mar 2014 with 12 months access run at 1x1033 until phase 2 shutdown increase hadron data sample by factor 10 reach detector design lumi of 20 fb1 except velo lhcb upgrade phase 2.
The lhcb rich detector control system cern document server. The lhcb experiment is designed to operate at an lhc luminosity of 2. It then took almost 15 years of effort by over 730 people from many universities and institutes across 15 countries, to complete the construction of lhcb. One of its key detector components is the ringimaging cherenkov rich system. The lhcb management is composed of the spokesperson, the deputy spokespersons. Antunes nobrega and others published lhcb reoptimized detector design and performance. Keizer, floris the increase in luminosity during the lhc upgrade programme causes a rise in particle multiplicity and hit occupancy in the lhcb detector. The lhcb detector 30, 31 is a singlearm forward spectrometer covering the pseudorapidity range 2 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. Understand the lhcb configuration management get a copy of a package from the lhcb code repository know how to rebuild libraries and programs lesson aim understanding and being able of using the basic commands of the configuration and build system is a. It was developed to visually debug developed detector geometries including partial views using prede ned displays. Cern among particle physicists, sheldon stone has a reputation for high standards and brutal honesty. Lhcb is a dedicated setup for bphysics studies at lhc ppcollisions at e cm14 tev inel.
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. Beam loss scintillator system for background monitoring at the lhcb experiment f. The lhcb experiment is dedicated to precision measurements of cp violation and. It is robust, protects against operator mistakes and can take automatic actions. After about five years it will have recorded a data sample of 10 fb. Today, lhcb has successfully started to take data and we are very excited by. Lieng tu dortmund rupac 2010 institute for high energy physics protvino russia. The aim of the lhcb experiment is to record the decay of particles containing b and antib quarks, collectively known as b mesons. Performance of lhcb silicon tracker detector in the lhc. Single event burnout in dcdc converters for the lhc experiments c. Advanced european infrastructures for detectors at. Detector description 92 92 gaudi framework tutorial, 2004 goals overview of detector description in gaudi what we understand as detector description understanding the transient view understanding the persistent view role of conditions database goals. It will be installed in ls4 2030 and targets an instantaneous luminosity of 1 to 2x1034 cm2 s1, with an integrated luminosity of at least 300fb1. Epfl building new particle detector for large hadron collider.
It consist of a first phase where the events are generated e. Files are available under licenses specified on their description page. Information from all the detector subsystems is used to create charged and neutral particle inputs to the jet algorithm using a particle. The lhcb detector the lhcb detector is a single arm spectrometer in the forward direction, whose design has been optimised for the measurement of decays of b and c hadrons. Microchannel plate photomultipliers, lhcb upgrade pacs. The experiment will be upgraded to a triggerless system reading out the full detector at a 40 mhz event rate with all selection algorithms executed in a cpu farm. So when stone discusses recent observations that he and his colleagues have made. 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. 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 antimatter. The efficient operation of the two ring imaging cherenkov rich detectors of the lhcb experiment is essential for hadron identification.
The gauss integration and release manager is gloria corti. The lhcb decector tracker rich1 rich2 muons hcal tt1 velo ecal physics. The atlas detector weighs 7,000 tonnes, similar to the weight of the eiffel tower. The charged particles are bent by a warm dipole magnet which has a. It is shown that the design criteria of the experiment. Lhcb detector is a specialized detector for the study of bquark physics. 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. Lhcbsimulation lhcb simulation software, built on the gaudi framework. A series of sub detectors surrounding the collision point stretch 20 meters 65. The rich detectors for the upgraded lhcb experiment. The discriminator digital to analogue converter determines whether a signal is over.
Therefore we must create a number of place holders where the physics and sub detector speci. The large hadron collider lhc at cern, the european organization for nuclear research, produces hundreds of millions of proton collisions per second. This operation can be generally done during the initialization phase of the. The large hadron collider lhc is a particle collider based at cern, accelerating two beams of. The lhcb detector has a silicon vertex detector around the interaction region. The lhcb large hadron collider beauty experiment is one of eight particle physics detector experiments collecting data at the large hadron collider at cern.
Pdf the large hadron collider beauty experiment calorimeters. Next is the large hadron collider beauty lhcb detector site. May 15, 20 the lhcb experiment has been taking data at the large hadron collider lhc at cern since the end of 2009. The frontend architecture chosen for lhcb 4, 5 has to a very large extent been determined by the requirement of making a hardwarebased short latency trigger, with an efficient event selection, for complicated b events. Lhcb is not a general purpose detector, with the aim of detecting as many different types of physics events as possible. The lhcb detector is a forward spectrometer at the large hadron collider lhc at cern. The new readout scheme and operation conditions will require the replacement of many sub detectors among which is the vertex locator.
Jul 18, 2007 the lhcb detector has a silicon vertex detector around the interaction region. The performance of the detector is presented based on data of the lhc run 2 running period from 2015 and 2016. The silicon strip vertex locator velo at the lhcb experiment should be replaced. Ondetector electronics for the lhcb velo upgrade core. Detailed performance of the outer tracker at lhcb nikhef. The lhcb experiment is designed for precision measurements of cp violation and rare decays of beauty and charm hadrons. Lhcb institutes meetings available talks 19th lhcb hackathon of software for the upgrade, may 2528, 2020, registration open. At this time lhcb plans an upgrade to operate the detector at a significantly increased luminosity that will greatly extend its. The purpose of the lhcb is to search for evidence of antimatter. The largest volume detector ever constructed for a particle collider, atlas has the dimensions of a cylinder, 46m long, 25m in diameter, and sits in a cavern 100m below ground. Welcome to the public pages of the lhcb velo project.
Characterisation of the timepix chip for the lhcb velo. The physics potential of an upgrade to the lhcb detector, which would allow an order of magnitude more data to be collected, is emphasised. Detector store message service joboptions service particle prop. During 2011 and 2012, lhcb collected data with a mean number of pp collisions per crossing of about 1. It does this by searching for a particle called the beauty quark. Converter converter lhcb particles lhcb vertices hepmc event converter kine conversion. 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. Data reconstruction with the lhcb velo tomasz szumlak 1. 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. The detector control system for the lhcb rich is an essential part that ensures the safe operation of the detectors.
The analog frontend and the l0 pipeline with its l0 derandomizer is contained in the beetle asic located inside the vacuum vessel of the detector. The lhcb detector is a singlearm spectrometer, since at. Lhcb is a dedicated setup for bphysics studies at lhc ppcollisions at e cm14 tev. Figure1 inside the lhcb detector at cern, colliding protons blast exotic particles into fleeting existence. Advanced european infrastructures for detectors at accelerators 1 introduction short usage description of ddeve. In this paper the performance of the various lhcb sub detectors and the trigger system are described, using data taken from 2010 to 2012. It has overall responsibility for managing the detector operation and upgrades as well as the physics analysis. Sep 06, 2017 a particle detector made up of 10,000 kilometers of scintillating fiber is under construction and will be added onto cerns particle accelerator. The readout electronics of the scifi tracker for lhcb. Moedal uses detectors deployed near lhcb to search for a. Pdf phase i upgrade of the readout system of the vertex.
To facilitate tiling the chip, the circuit is placed at one side of the chip. The large hadron collider lhc evans, the lhc machine, pos epshep2009 004, 2009 1 is a synchrotron particle accelerator with a circumference of 27 km located about 100 m underground at cern in. This is performed through the precise measurement of cp violation and rare decays. Each module is composed of 4 sensors, 12 asics and two. The lhcb velo detector a high precision silicon device for vertexing, tracking and triggering in lhcb. The lhcb management represents the collaboration towards outside bodies. The lhcb spectrometer is designed with special emphasis on the discovery potential of b and cphysics studies. Figure 1 depicts the schematic diagram of such topology. Lhcb detector performance international journal of.
City and county of denver colorado charleston county south carolina dauphin county pennsylvania cass county north dakota. Generalities th evico rc o nv r ti s af w d qu converter with secondaryside resonance operating in halfwave mode 4. Gauss geant4 based simulation for lhcb geant4 workshop 2 october 2002 w. Single event burnout in dcdc converters for the lhc. Since the completion of the lhcb detector, it has extensively been commissioned with cosmic. The experiment is designed for precision measurements of cp violation and rare decays of beauty and charm hadrons. The lhcb management is the executive body of the collaboration. The lhcb detector at the large hadron collider springerlink. Multiplexed analog data from the l0 derandomizer is transported out of the vacuum vessel on a large set of differential twisted pairs, via repeater boards, to the. The main characteristics of the setup are discussed shortly. Implications of lhcb measurements and future prospects. Lhcb is an experiment at the cern lhc dedicated to beauty and charm hadron physics. Detectors are retracted during beam injection zpv za zpv zb detection of multiple primary vertices rstrip detectors only l0trigger.
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