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Radiation hard silicon sensors for the CMS tracker upgrade

At an instantaneous luminosity of $5 \times 10^{34}$ cm$^{-2}$ s$^{-1}$, the high-luminosity phase of the Large Hadron Collider (HL-LHC) is expected to deliver a total of $3\,000$ fb$^{-1}$ of collisions, hereby increasing the discovery potential of the LHC experiments significantly. However, the ra...

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Autor principal: Pohlsen, Thomas
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:https://dx.doi.org/10.1109/NSSMIC.2013.6829543
http://cds.cern.ch/record/1628929
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author Pohlsen, Thomas
author_facet Pohlsen, Thomas
author_sort Pohlsen, Thomas
collection CERN
description At an instantaneous luminosity of $5 \times 10^{34}$ cm$^{-2}$ s$^{-1}$, the high-luminosity phase of the Large Hadron Collider (HL-LHC) is expected to deliver a total of $3\,000$ fb$^{-1}$ of collisions, hereby increasing the discovery potential of the LHC experiments significantly. However, the radiation dose of the tracking systems will be severe, requiring new radiation hard sensors for the CMS tracker. The CMS tracker collaboration has initiated a large material investigation and irradiation campaign to identify the silicon material and design that fulfils all requirements for detectors for the HL-LHC. Focussing on the upgrade of the outer tracker region, pad sensors as well as fully functional strip sensors have been implemented on silicon wafers with different material properties and thicknesses. The samples were irradiated with a mixture of neutrons and protons corresponding to fluences as expected for the positions of detector layers in the future tracker. Different proton energies were used for irradiations to investigate the energy dependence of the defect generation in oxygen rich material. The measurements performed on the structures include electrical sensor characterization, measurement of the collected charge injected with a beta source or laser light and bulk defect characterization. Measurements are performed at different annealing times. In this paper, results from the ongoing campaign are presented which led to the decision to take p-type silicon sensors for the CMS strip tracker.
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spelling cern-16289292019-09-30T06:29:59Zdoi:10.1109/NSSMIC.2013.6829543http://cds.cern.ch/record/1628929engPohlsen, ThomasRadiation hard silicon sensors for the CMS tracker upgradeDetectors and Experimental TechniquesAt an instantaneous luminosity of $5 \times 10^{34}$ cm$^{-2}$ s$^{-1}$, the high-luminosity phase of the Large Hadron Collider (HL-LHC) is expected to deliver a total of $3\,000$ fb$^{-1}$ of collisions, hereby increasing the discovery potential of the LHC experiments significantly. However, the radiation dose of the tracking systems will be severe, requiring new radiation hard sensors for the CMS tracker. The CMS tracker collaboration has initiated a large material investigation and irradiation campaign to identify the silicon material and design that fulfils all requirements for detectors for the HL-LHC. Focussing on the upgrade of the outer tracker region, pad sensors as well as fully functional strip sensors have been implemented on silicon wafers with different material properties and thicknesses. The samples were irradiated with a mixture of neutrons and protons corresponding to fluences as expected for the positions of detector layers in the future tracker. Different proton energies were used for irradiations to investigate the energy dependence of the defect generation in oxygen rich material. The measurements performed on the structures include electrical sensor characterization, measurement of the collected charge injected with a beta source or laser light and bulk defect characterization. Measurements are performed at different annealing times. In this paper, results from the ongoing campaign are presented which led to the decision to take p-type silicon sensors for the CMS strip tracker.CMS-CR-2013-405oai:cds.cern.ch:16289292013-11-08
spellingShingle Detectors and Experimental Techniques
Pohlsen, Thomas
Radiation hard silicon sensors for the CMS tracker upgrade
title Radiation hard silicon sensors for the CMS tracker upgrade
title_full Radiation hard silicon sensors for the CMS tracker upgrade
title_fullStr Radiation hard silicon sensors for the CMS tracker upgrade
title_full_unstemmed Radiation hard silicon sensors for the CMS tracker upgrade
title_short Radiation hard silicon sensors for the CMS tracker upgrade
title_sort radiation hard silicon sensors for the cms tracker upgrade
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1109/NSSMIC.2013.6829543
http://cds.cern.ch/record/1628929
work_keys_str_mv AT pohlsenthomas radiationhardsiliconsensorsforthecmstrackerupgrade