Radiation tolerance of the CMS forward pixel detector

Cerati, G. B.; Dinardo, M. E.; Flórez, Astrid Carolina; Kwan, S.; López, A.; Magni, Simone; Malvezzi, S.; Menasce, D.; Moroni, L.; Newsom, C. R.; Pedrini, D.; Rovere, M.; Sala, Simone; Tan, P.; Taroni, S.; Turqueti, Marcos; Uplegger, L.

doi:10.1016/j.nima.2008.11.114

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…As the readout electronics have a detection threshold, a low signal can cause inefficiency. In order to predict the performance for high fluences, sensors have been irradiated and thoroughly investigated with a radioactive source [44] (BPIX) and at a beam test [45] (FPIX). In both cases the results confirmed that the sensors can tolerate the expected radiation doses and collect enough charge with a high efficiency.…”

Section: Sensor Radiation Hardnessmentioning

confidence: 99%

CMS Technical Design Report for the Pixel Detector Upgrade

Dominguez¹

2012

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The original design goal of the LHC was to operate at 1 × 10 34 cm -2 s -1 with 25 ns bunch spacing, where approximately 25 simultaneous inelastic collisions per crossing ("pile-up") occur. With the upgrade of the accelerators, the luminosity and pile-up will more than double. The current pixel detector is crucial to charged particle tracking, but was not designed to perform effectively in such collision conditions and the physics program of CMS would suffer as a result. We propose to replace the current pixel tracker with a new high efficiency and low mass detector with four barrel layers and three forward/backward disks to provide four-hit pixel coverage out to pseudorapidities of ±2.5. This new detector will meet or exceed the original design specifications in these high luminosity environments. In this report, we provide details on the design, construction and installation of the upgraded pixel detector as well as estimates of its expected performance. Cover Design S. Cittolin AcknowledgmentsWe would like to thank the technical staff from the various institutions for the design, R&D and testing of the many components of this upgrade.We also wish to thank the LHCC for their oversight and crucial advice during the development of the the pixel upgrade project. The important feedback from following CMS internal reviewers greatly helped in the development of this technical design report: D. Contardo, S. Dasu, S.C. Eno, P. Giacomelli, G. Gomez Ceballos, E. Halkiadakis, C. Hill, M. Klute, S. Lowette, M. Mannelli, S. Nahn, I. Shipsey, D. Stuart, S. Tkaczyk and J. Varela.A special thanks goes to the CMS Secretariat, in particular Anastasia Dolya, for their tireless support during all stages of the project. We also acknowledge the warm support received from the CMS management team and computing project.Finally, we dedicate this technical design report for the upgrade of the pixel detector to the memory of our two colleagues and friends:

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Section: Sensor Radiation Hardnessmentioning

confidence: 99%

CMS Technical Design Report for the Pixel Detector Upgrade

Dominguez¹

2012

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“…However, as the sensors collect electrons, after radiation-induced space charge sign inversion, the detector can be still be read out and there is a higher charge collection efficiency. Studies of both the barrel and forward sensors after irradiation have shown there is still sufficient charge after fluences above 10 15 n eq /cm 2 [5,6]. Because of the short timescale for producing a replacement, and as there are not other good options, the plan is to continue to use similar sensors to the present.…”

Section: The Cms Pixel Detectormentioning

confidence: 99%

Plans for an upgraded CMS pixel detector

Bean

2011

Nuclear Instruments and Methods in Physics Research Section A:

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The CMS inner pixel detector system is planned to be upgraded during the first phase of LHC upgrades. The plans call for an ultra low mass system with four barrel layers with three disks on either end. With the expected increase in particle rates, the electronic readout chain will be changed for fast digital signals. While there are constraints due to the services available, expectations are there will be improved tracking performance. AbstractThe CMS inner pixel detector system is planned to be upgraded during the first phase of LHC upgrades. The plans call for an ultra low mass system with four barrel layers and with three disks on either end. With the expected increase in particle rates, the electronic readout chain will be changed for fast digital signals. There are constraints due to the services available. However, expectations are there will be improved tracking performance.

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“…The innermost part of the pixel detector is expected to be heavily degraded before the end of the Phase 1 [7,8].…”

Section: Further Development For Late Phasementioning

confidence: 99%

A new CMS pixel detector for the LHC luminosity upgrade

Favaro

2011

Nuclear Instruments and Methods in Physics Research Section A:

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The CMS inner pixel detector system is planned to be replaced during the first phase of the LHC luminosity upgrade. The plans foresee an ultra low mass system with four barrel layers and three disks on either end. With the expected increase in particle rates, the electronic readout chain will be changed for fast digital signals. An overview of the envisaged design options for the upgraded CMS pixel detector is given, as well as estimates of the tracking and vertexing performance.Comment: 5 pages, 8 figures, proceedings of 8th International Conference on Radiation Effects on Semiconductor Materials Detectors and Device

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Radiation tolerance of the CMS forward pixel detector

Cited by 7 publications

References 3 publications

CMS Technical Design Report for the Pixel Detector Upgrade

CMS Technical Design Report for the Pixel Detector Upgrade

Plans for an upgraded CMS pixel detector

A new CMS pixel detector for the LHC luminosity upgrade

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