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

By Dan Green

Too usually descriptions of detectors specialise in the "what" and never the "why". This quantity goals to explain 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 atmosphere. The target of LHC physics is to discover the mechanism for electroweak symmetry breaking. a result of minuscule cross-sections which must be explored, 0.1 facebook, the LHC must offer a hundred fb-1/yr, or a right away luminosity of 1034 / (cm2 sec). With a number crossing period of 25 nsec, like minded to detector speeds, there'll be 25 occasions occupying each one bunch crossing. therefore the physics calls for quick, finely segmented, low noise and radiation resistant detectors which offer redundant measurements of the hardly ever produced electrons and muons. to accomplish these ambitions, new floor was once 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 platforms, and within the facts acquisition tools used.

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By Dan Green

Too usually descriptions of detectors specialise in the "what" and never the "why". This quantity goals to explain 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 atmosphere. The target of LHC physics is to discover the mechanism for electroweak symmetry breaking. a result of minuscule cross-sections which must be explored, 0.1 facebook, the LHC must offer a hundred fb-1/yr, or a right away luminosity of 1034 / (cm2 sec). With a number crossing period of 25 nsec, like minded to detector speeds, there'll be 25 occasions occupying each one bunch crossing. therefore the physics calls for quick, finely segmented, low noise and radiation resistant detectors which offer redundant measurements of the hardly ever produced electrons and muons. to accomplish these ambitions, new floor was once 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 platforms, and within the facts acquisition tools used.

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

Example text

Radiation hardness The radiation inside the CMS detector is a spectrum of charged and neutral particles coming from primary proton–proton collisions and from secondary interactions in the material of the detector. Ionizing radiation leads to the accumulation of charges in CMOS electronics and sensor surface structures. The consequences of that must be mitigated by appropriate designs. All components of the radiation generate bulk damage in the silicon of the sensor, which determines the lifetime of the detector.

2. ch/lhc. 3. html. 4. html. 5. html. 6. The CERN. Large Hadron Collider: accelerator and experiments, J. Instrum. 3 (2008) SO8001–SO8007. 7. D. Froidevaux and P. Sphicas. General-purpose detectors for the Large Hadron Collider, Annu. Rev. Nucl. Part. Sci. 56 (2006) 375. 8. C. Amsler et al. Review of particle physics, Phys. Lett. B 667 (2008) 1. 9. org/wiki/Dark matter and links and references therein. 10. J. Gunion, H. Haber, S. Dawson and G. Kane. The Higgs Hunter’s Guide, (Westview, 2000). 11.

3. Radiation hardness The radiation inside the CMS detector is a spectrum of charged and neutral particles coming from primary proton–proton collisions and from secondary interactions in the material of the detector. Ionizing radiation leads to the accumulation of charges in CMOS electronics and sensor surface structures. The consequences of that must be mitigated by appropriate designs. All components of the radiation generate bulk damage in the silicon of the sensor, which determines the lifetime of the detector.

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