Download PDF by Dan Green: At the Leading Edge: The ATLAS and CMS LHC Experiments

By Dan Green

ISBN-10: 9814277614

ISBN-13: 9789814277617

ISBN-10: 9814304670

ISBN-13: 9789814304672

Too usually descriptions of detectors specialize in the "what" and never the "why". This quantity goals to clarify how the necessities of the physics on the huge Hadron Collider (LHC) outline the detector setting. In flip, the detector offerings are made to undertake to that surroundings. The objective of LHC physics is to discover the mechanism for electroweak symmetry breaking. end result of the minuscule cross-sections which have to be explored, 0.1 facebook, the LHC must supply a hundred fb-1/yr, or a right away luminosity of 1034 / (cm2 sec). With a host crossing period of 25 nsec, like minded to detector speeds, there'll be 25 occasions occupying every one bunch crossing. therefore the physics calls for speedy, finely segmented, low noise and radiation resistant detectors which supply redundant measurements of the hardly produced electrons and muons. to accomplish these pursuits, new flooring used to be damaged in developing the A Toroidal LHC equipment (ATLAS) and Compact Muon Solenoid (CMS) detectors within the vertex detectors, monitoring platforms, calorimetry, powerful magnets, muon structures, entrance finish electronics, set off structures, and within the facts acquisition equipment used.

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Extra info for At the Leading Edge: The ATLAS and CMS LHC Experiments

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1. 5% of the time. Clearly, a limited cone size, if used to estimate the true jet energy, has a limited energy resolution due to fluctuations in the energy radiated outside the cone. A Monte Carlo model of the W hadronic decay into quark pairs which then hadronizes into dijets is given in Fig. 19. Clearly, the FSR of gluons is an irreducible limitation on doing precision dijet spectroscopy in the environment of a hadron collider. In order to reduce the problem of FSR the cone size could be increased to capture the radiated energy.

New territory for electronics, sensor and interconnect technology was entered for building the CMS pixel detector. a A parallel effort existed at UC Davis. US groupsb took responsibility for the forward endcaps of the pixel detector. The work of the first years focused on very basic R&D on sensors and radiation-hard readout chip concepts. 6, 7 Building blocks of the readout and small prototype chips followed. 8 The mechanical detector layout and a detailed module design were developed for the Technical Design Report9 (TDR) in 1998.

Introduction The identification of long-lived particles through the detection of secondary vertices and impact parameters is an important ingredient of a high energy physics experiment. Vertex detection of particles with submillimeter decay length requires precise track measurements close to the production point. 1 Energy and luminosity targets for the LHC lead to particle fluxes far beyond those encountered at other colliders. Every cm2 of a detector close to the beam pipe is expected to be hit by 100 million particles per second when the LHC runs at the full design luminosity of 1034 cm−2 s−1 .

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At the Leading Edge: The ATLAS and CMS LHC Experiments by Dan Green

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