Readout chip for Column Parallel CCD, CPR2A
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 607:3 (2009) 640-647
Abstract:
The LCFI Collaboration is developing the sensors, readout electronics and mechanical support structures for the vertex detector (VXD) of the International Linear Collider (ILC), as well as studying the physics performance that the VXD will achieve. Since the VXD must provide excellent spatial resolution, the sensors must have very low mass and their power consumption must be small to ensure that the sensors themselves cause as little multiple scattering as possible and that gas cooling can be used to operate them at temperatures of about -40 C. High-speed readout is also needed to ensure that the occupancy due to the pair production background at the ILC is kept below the 1% level. In order to satisfy these strict requirements, Column Parallel CCDs (CPCCDs) and Column Parallel Readout chips (CPRs) have been developed. The readout chips must be able to operate synchronously with the CPCCDs and ensure fast signal processing with low noise and data compression. The design and performance of the latest version of the readout chip, the CPR2A, are described here. © 2009 Elsevier B.V.The ATLAS experiment at the CERN large hadron collider
Journal of Instrumentation 3:8 (2008)
The integration and engineering of the ATLAS SemiConductor Tracker Barrel
Journal of Instrumentation 3:10 (2008)
Abstract:
The ATLAS SemiConductor Tracker (SCT) was built in three sections: a barrel and two end-caps. This paper describes the design, construction and final integration of the barrel section. The barrel is constructed around four nested cylinders that provide a stable and accurate support structure for the 2112 silicon modules and their associated services. The emphasis of this paper is directed at the aspects of engineering design that turned a concept into a fully-functioning detector, as well as the integration and testing of large sub-sections of the final SCT barrel detector. The paper follows the chronology of the construction. The main steps of the assembly are described with the results of intermediate tests. The barrel service components were developed and fabricated in parallel so that a flow of detector modules, cooling loops, opto-harnesses and Frequency-Scanning-Interferometry (FSI) alignment structures could be assembled onto the four cylinders. Once finished, each cylinder was conveyed to the next site for the mounting of modules to form a complete single barrel. Extensive electrical and thermal function tests were carried out on the completed single barrels. In the next stage, the four single barrels and thermal enclosures were combined into the complete SCT barrel detector so that it could be integrated with the Transition Radiation Tracker (TRT) barrel to form the central part of the ATLAS inner detector. Finally, the completed SCT barrel was tested together with the TRT barrel in noise tests and using cosmic rays. © 2008 IOP Publishing Ltd and SISSA.Experimental observation of nonspherlcally-decaying radiation from a rotating superluminal source
Journal of Applied Physics 96:8 (2004) 4614-4631
Abstract:
An experimental implementation of an oscillating, superluminal polarization current distribution that undergoes centripetal acceleration was constructed and tested. The emission from the experimental machine was found to be tightly beamed in both the azimuthal and polar directions. It was found that the beaming is frequency independent and has a sharply defined and unchanging geometry determined only by the speed and path of the moving distribution pattern. The intensity of the radiation at these angles was observed to decline more slowly with increasing distance from the source than would the emission from a conventional antenna.Experimental demonstration of emission from a superluminal polarization current - a new class of solid-state source for MHz-TRz and beyond
(2004) 591-592