The barrel modules of the ATLAS semiconductor tracker
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment A568 (2006) 642-671
Design and performance of the ABCD3TA ASIC for readout of silicon strip detectors in the ATLAS semiconductor tracker
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 552:3 (2005) 292-328
Abstract:
The ABCD3TA is a 128-channel ASIC with binary architecture for the readout of silicon strip particle detectors in the Semiconductor Tracker of the ATLAS experiment at the Large Hadron Collider (LHC). The chip comprises fast front-end and amplitude discriminator circuits using bipolar devices, a binary pipeline for first level trigger latency, a second level derandomising buffer and data compression circuitry based on CMOS devices. It has been designed and fabricated in a BiCMOS radiation resistant process. Extensive testing of the ABCD3TA chips assembled into detector modules show that the design meets the specifications and maintains the required performance after irradiation up to a total ionising dose of 10 Mrad and a 1-MeV neutron equivalent fluence of 2×10 14 n/cm2, corresponding to 10 years of operation of the LHC at its design luminosity. Wafer screening and quality assurance procedures have been developed and implemented in large volume production to ensure that the chips assembled into modules meet the rigorous acceptance criteria. © 2005 Elsevier B.V. All rights reserved.Design and performance of the ABCD3TA ASIC for readout of silicon strip detectors in the ATLAS semiconductor tracker
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 552:3 (2005) 292-328
Coordinate measurement in 2-D and 3-D geometries using frequency scanning interferometry
OPT LASER ENG 43:7 (2005) 815-831
Abstract:
Frequency Scanning Interferometry (FSI) has been developed for robust precise distance measurements. We present the reconstruction of two and three dimensional geodetic grids, using simultaneous FSI measurements between grid nodes.The shape of the particle physics tracker inside the ATLAS experiment (currently under construction for the Large Hadron Collider at CERN) will be monitored using a geodetic grid of 842 remotely measured, fibre-coupled interferometers. The challenge is to make precise distance measurements in the hostile, high radiation environment and combine them to reconstruct node coordinates and hence the grid shape in quasi real time to a three dimensional precision of around 10 mu m.Two and three dimensional prototype grids with adjustable geometries have been measured, demonstrating shape reconstruction to a precision of around 1 mu m. Error propagation through these grids was studied with different reconstruction models. Grid redundancy allowed the agreement between software models and node coordinate reconstruction to be verified. (c) 2004 Elsevier Ltd. All rights reserved.Beam tests of ATLAS SCT silicon strip detector modules
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 538:1-3 (2005) 384-407