The luminosity upgrade of the Large Hadron Collider (LHC), the sLHC, will constitute an extremely challenging radiation environment for tracking detectors. Significant improvements in radiation hardness are needed to cope with the increased radiation dose, requiring new tracking detectors. In the upgraded ATLAS detector the region from 20 to 50cm distance to the beam will be covered by silicon strip detectors(SSD) with short strips. These will have to withstand a 1MeV neutron equivalent fluence of about1E15 neq/cm2, hence extreme radiation resistance is necessary. For the short strips, we propose to use SSD realised in the radiation tolerant 3D technology, where rows of columns —etched into the silicon bulk — are joined together to form strips. To demonstrate the feasibility of 3D SSD for the sLHC, we have built prototype modules using 3D-single-type-column (stc) SSD with short strips and front-end electronics from the present ATLAS SCT. The modules were read out with the SCT Data Acquisition system and tested with an IR-laser. We report on the performance of these 3D modules, in particular the noise at 40MHz which constitutes a measurement of the effective detector capacitance. Conclusions about options for using 3D SSD detectors for tracking at the sLHC are drawn.

Short p-type silicon microstrip detectors in 3D-stc technology

Dalla Betta, Gian Franco;Pozza, Alberto;Zorzi, Nicola
2008

Abstract

The luminosity upgrade of the Large Hadron Collider (LHC), the sLHC, will constitute an extremely challenging radiation environment for tracking detectors. Significant improvements in radiation hardness are needed to cope with the increased radiation dose, requiring new tracking detectors. In the upgraded ATLAS detector the region from 20 to 50cm distance to the beam will be covered by silicon strip detectors(SSD) with short strips. These will have to withstand a 1MeV neutron equivalent fluence of about1E15 neq/cm2, hence extreme radiation resistance is necessary. For the short strips, we propose to use SSD realised in the radiation tolerant 3D technology, where rows of columns —etched into the silicon bulk — are joined together to form strips. To demonstrate the feasibility of 3D SSD for the sLHC, we have built prototype modules using 3D-single-type-column (stc) SSD with short strips and front-end electronics from the present ATLAS SCT. The modules were read out with the SCT Data Acquisition system and tested with an IR-laser. We report on the performance of these 3D modules, in particular the noise at 40MHz which constitutes a measurement of the effective detector capacitance. Conclusions about options for using 3D SSD detectors for tracking at the sLHC are drawn.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11582/4345
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