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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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Lenguaje: | eng |
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2013
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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. |
id | cern-1628929 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2013 |
record_format | invenio |
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 |