In 2014 the Insertable B-Layer (IBL) will extend the existing Pixel Detector of the ATLAS experiment at CERN by over 12 million additional pixels. For calibration and monitoring purposes, occupancy ...and time-over-threshold data are being histogrammed in the read-out hardware. Further processing of the histograms happens on commodity hardware, which not only requires the fast transfer of histogram data from the read-out hardware to the computing farm via Ethernet, but also the integration of the software and hardware into the already existing data-acquisition and calibration framework (TDAQ and PixelDAQ) of the ATLAS experiment and the current Pixel Detector. We implement the software running on the compute cluster with an emphasis on modularity, allowing for flexible adjustment of the infrastructure and a good scalability with respect to the number of network interfaces, available CPU cores, and deployed machines. By using a modular design we are able to not only employ CPU-based fitting algorithms, but also have the possibility to take advantage of the performance offered by a GPU-based approach to fitting.
MCC: the Module Controller Chip for the ATLAS Pixel Detector Beccherle, R; Darbo, G; Gagliardi, G ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/2002, Letnik:
492, Številka:
1
Journal Article
Recenzirano
Odprti dostop
In this article we describe the architecture of the Module Controller Chip for the ATLAS Pixel Detector. The project started in 1997 with the definition of the system specifications. A first ...fully-working rad-soft prototype was designed in 1998, while a radiation hard version was submitted in 2000. The 1998 version was used to build pixel detector modules. Results from those modules and from the simulated performance in ATLAS are reported. In the article we also describe the hardware/software tools developed to test the MCC performance at the LHC event rate.
The ATLAS silicon pixel sensors Alam, M.S; Ciocio, A; Einsweiler, K ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2001, Letnik:
456, Številka:
3
Journal Article
Recenzirano
Odprti dostop
Prototype sensors for the ATLAS silicon pixel detector have been developed. The design of the sensors is guided by the need to operate them in the severe LHC radiation environment at up to several ...hundred volts while maintaining a good signal-to-noise ratio, small cell size, and minimal multiple scattering. The ability to be operated under full bias for electrical characterization prior to attachment of the readout integrated circuit electronics is also desired.
Electrical characteristics of silicon pixel detectors Gorelov, I; Gorfine, G; Hoeferkamp, M ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2002, Letnik:
489, Številka:
1
Journal Article
Recenzirano
Prototype sensors for the ATLAS silicon pixel detector have been electrically characterized. The current and voltage characteristics, charge-collection efficiencies, and resolutions have been ...examined. Devices were fabricated on oxygenated and standard detector-grade silicon wafers. Results from prototypes which examine p-stop and standard and moderated p-spray isolation are presented for a variety of geometrical options. Some of the comparisons relate unirradiated sensors with those that have received fluences relevant to LHC operation.
A fast track reconstruction algorithm for the ATLAS second level trigger is presented. The timing performance (
3.5
ms
for a jet reconstruction at low luminosity) is satisfactory; the transverse ...impact parameter resolution (
75
μm
) is sufficient to perform an on-line b-tagging, and the full three-dimensional reconstruction produces good seeds for more sophisticated track searches.
PDF
