Observation, modeling, and temperature dependence of doubly peaked electric fields in irradiated silicon pixel sensors

Swartz, M.; Chiochia, V.; Allkofer, Y.; Bortoletto, D.; Cremaldi, L.; Cucciarelli, S.; Dorokhov, A.; Hörmann, Ch.; Kim, D.; Konecki, M.; Kotlinśki, D.; Prokofiev, K.; Regenfus, C.; Rohe, T.; Sanders, D. A.; Son, Seunghee; Speer, T.

doi:10.1016/j.nima.2006.05.002

Cited by 22 publications

(27 citation statements)

References 12 publications

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“…The systematic uncertainties on ξ min related to the selection cuts and fit range are estimated to be approximately 3%. All results agree very well with ditailed simulations performed with the PIXELAV program [9].…”

Section: B Lorentz Angle Measurementssupporting

confidence: 83%

Cosmic ray study of the CMS pixel tracker

Dinardo

2009

2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)

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The pixel detector of the Compact Muon Solenoid (CMS) experiment consists of three barrel layers and two endcap disks at each side of the barrel section. The detector was installed in summer 2008, commissioned with the readout chip internal pulse generator, and used in cosmic ray trigger data taking in a 3.8 T magnetic field. Despite the excellent detector performance some problems arose after installation. In about a year we went through a complete and important sequence of steps that go from the insertion of the detector in CMS, calibration, running, extraction, maintenance, to the re-insertion, re-calibration and final running. In this paper a summary of the knowledge acquired during the first year of running will be presented. Currently 98.6% of the whole pixel detector is fully functional and results on detector performance are found to be in line with the design specifications. Abstract-The pixel detector of the Compact Muon Solenoid (CMS) experiment consists of three barrel layers and two endcap disks at each side of the barrel section. The detector was installed in summer 2008, commissioned with the readout chip internal pulse generator, and used in cosmic ray trigger data taking in a 3.8 T magnetic field. Despite the excellent detector performance some problems arose after installation. In about a year we went through a complete and important sequence of steps that go from the insertion of the detector in CMS, calibration, running, extraction, maintenance, to the re-insertion, re-calibration and final running. In this paper a summary of the knowledge acquired during the first year of running will be presented. Currently 98.6% of the whole pixel detector is fully functional and results on detector performance are found to be in line with the design specifications.

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Section: B Lorentz Angle Measurementssupporting

confidence: 83%

Cosmic ray study of the CMS pixel tracker

Dinardo

2009

2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)

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“…The effective thresholds are estimated by comparing the distribution of measured cluster x-sizes (azimuthal direction in the barrel detector and radial direction in the endcap detectors) with those predicted by the detailed pixel simulation, PIXELAV [10,11]. The cluster sizes are sensitive to the effective thresholds.…”

Section: Operating Conditionsmentioning

confidence: 99%

CMS tracking performance results from early LHC operation

Khachatryan¹,

Sirunyan²,

Tumasyan³

et al. 2010

Eur. Phys. J. C

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273

343

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The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36 TeV were recorded by the CMS detector in December 2009. The trajectories of charged particles produced in the collisions were reconstructed using the all-silicon Tracker and their momenta were measured in the 3.8 T axial magnetic field. Results from the Tracker commissioning are presented including studies of timing, efficiency, signal-to-noise, resolution, and ionization energy. Reconstructed tracks are used to benchmark the performance in terms of track and vertex resolutions, reconstruction of decays, estimation of ionization energy loss, as well as identification of photon conversions, nuclear interactions, and heavy-flavour decays.

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“…In this method, the measured cluster charge distribution is compared to a collection of templates distributions, obtained via simulation. These templates are produced using the Pixelav programm [4] [5] [6]. In particular, the effect of radiation on sensors can be simulated, and therefore, the evolution of cluster charge distribution over time can be anticipated.…”

Section: Hit Reconstructionmentioning

confidence: 99%

Track reconstruction in CMS high luminosity environment

Goetzmann¹

2015

Proceedings of Technology and Instrumentation in Particle Physics 2014 — PoS(TIPP2014)

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The CMS tracker is the largest silicon detector ever built, covering 200 square meters and providing an average of 14 high-precision measurements per track. Tracking is essential for the reconstruction of objects like jets, muons, electrons and tau leptons starting from the raw data from the silicon pixel and strip detectors. Track reconstruction is widely used also at trigger level as it improves objects tagging and resolution.The CMS tracking code is organized in several levels, known as iterative steps, each optimized to reconstruct a class of particle trajectories, as the ones of particles originating from the primary vertex or displaced tracks from particles resulting from secondary vertices. Each iterative step consists of seeding, pattern recognition and fitting by a kalman filter, and a final filtering and cleaning. Each subsequent step works on hits not yet associated to a reconstructed particle trajectory.The CMS tracking code is continuously evolving to make the reconstruction computing load compatible with the increasing instantaneous luminosity of LHC, resulting in a large number of primary vertices and tracks per bunch crossing. This is achieved by optimizing the iterative steps and by using new software techniques. Tracking algorithms used in CMS are described; physics and computing performances are discussed with respect to Run 1 and Run 2 physics program and within CMS future upgrades.

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Observation, modeling, and temperature dependence of doubly peaked electric fields in irradiated silicon pixel sensors

Cited by 22 publications

References 12 publications

Cosmic ray study of the CMS pixel tracker

Cosmic ray study of the CMS pixel tracker

CMS tracking performance results from early LHC operation

Track reconstruction in CMS high luminosity environment

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