Serial powering of silicon sensors is a novel powering scheme that would reduce the total power, the number of cables, the passive detector material, and the costs of future silicon trackers by large factors. Modules are chained in series and are served by a single current source. Serial powering is of great interest for future large-scale silicon tracking detectors for particle physics with many thousands of densely packed detector modules. Tests with six ATLAS semiconductor tracker (SCT) modules using both serial powering and the conventional independent powering have been carried out. The electrical performance of SCT modules powered in series is excellent. We present selected results and discuss the system aspects of a serial powering.

Serial Powering for Silicon Strip Detectors at SLUC

/pdf/serial-power-distribution-for-the-atlas-sct-upgrade-1oww6q61ms.pdf

Serial power distribution for the ATLAS SCT Upgrade

The LHC proton-proton collider is just starting to run at CERN. The luminosity of the LHC will increase over several years of operation reaching 10 34 cm -2 s -1 . Over the last years an upgrade of the LHC, the SuperLHC (SLHC), towards higher luminosities has been discussed as an extension of the LHC physics program. This increase in luminosity is foreseen around 2020 and will require challenging improvements in the detectors. In particular, the ATLAS experiment will require a new tracking system capable of dealing with an instantaneous luminosity of 10 35 cm -2 s -1 , one order of magnitude higher radiation levels and between 5 and 10 years of further operation. Many R&D activities for the SLHC are now starting and the corresponding collaboration frameworks with worldwide partners are being stablished. One of this R&D programs is devoted to the development of radiation hard silicon sensors to operate to the expected SLHC doses involving many particle physics groups and several leading manufacturers of silicon sensors. In this framework, new silicon sensors (like ptype silicon) and new technologies (like 3D devices) are investigated. In parallel, alternative module concepts have been developed with higher levels of integration. We will report on the status of the R&D projects on radiation hard silicon strip detectors for the ATLAS Tracker upgrade.

Atlas Strips Upgrade

While the Large Hadron Collider (LHC) is getting ready to start taking data in 2009, scenarios for a machine upgrade to achieve a much higher luminosity are being developed. In the current planning, it is foreseen to increase the luminosity of the LHC at CERN around 2018. As radiation damage scales with integrated luminosity, the particle physics experiments will need to be equipped with a new generation of radiation hard detectors. This article reports on the status of the R&D projects on radiation hard silicon strips detectors for particle physics, linked to the Large Hadron Collider Upgrade, superluminous-LHC (sLHC) of the ATLAS microstrip detector. The primary focus of this report is on measuring the radiation hardness of the silicon materials and the detectors under study. This involves designing silicon detectors, irradiating them to the sLHC radiation levels and studying their performance as particle detectors. The most promising silicon detector for the different radiation levels in the different regions of the ATLAS microstrip detector will be presented. Important challenges related to engineering layout, powering, cooling and reading out a very large strip detector are presented. Ideas on possible schemes for the layout and support mechanics will be shown.

/pdf/radiation-hard-silicon-strips-detectors-for-the-slhc-28qv58o61i.pdf

Radiation hard silicon strips detectors for the SLHC

A natural upgrade of the CERN LHC would be to increase the luminosity to 1035 cm?2s?1 For charged particle tracking at this Super-LHC, all-silicon systems are considered appropriate For tracking in an upgraded ATLAS detector, outisde a radius of 20 cm, large area integrated elements ("staves") containing silicon strip detectors are under design and development Each stave would hold of order 30 individual modules and contain integrated electrical services, mechanical support, and cooling Prototype tests of such staves are reported here including studies of noise, interference, and a comparison of power distribution by parallel and serial current flow Mechanical design and simulation on full length staves are presented as well

Development of Large Area Integrated Silicon Tracking Elements for the LHC Luminosity Upgrade

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Development of Large Area Integrated Silicon Tracking Elements for the LHC Luminosity Upgrade