A general survey is given of developments in the design of personal computers and implementation of their use in laboratory instrumentation and data handling etc. An extensive guide to commercial sources of hardware and software is given.
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A VME: Versa Module Europa, crate controller for high speed data acquisition of heterogeneous, multi-detector systems.
Rev Sci Instrum
January 2023
Indian Institute of Technology Delhi, New Delhi, India.
Modern day complex experiments in physics demand highly efficient data acquisition (DAQ) systems capable of acquiring a large number of signals with a very high resolution and near zero dead time, without compromising on the event rate handling capability. To cater to the ever growing demands of the DAQ systems, an intelligent controller with a sequencer and an in-built busy logic has been developed. The heart of the controller is a field programmable gate array that provides (a) a sequencer engine, which holds a list of read-write commands that will be executed upon receiving a valid trigger, (b) a dual port random access memory divided into two blocks of 16 kbytes, each of which is configured in a ping-pong fashion to support data acquisition and data transfer functionalities simultaneously, thereby reducing the dead time, (c) a busy logic interface that validates the master strobe or trigger, a scalar for triggers received, and a time stamp engine for time stamping the events with 10 ns interval, (d) the Versa Module Europa (VME) backplane interface for 32 bit data transfer standards of the VME, and (e) a superspeed universal serial bus communication interface to transfer the data to a computer/single board computer (SBC).
View Article and Find Full Text PDFArchitecture and Implementation of OpenPET Firmware and Embedded Software.
IEEE Trans Nucl Sci
April 2016
Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA.
OpenPET is an open source, modular, extendible, and high-performance platform suitable for multi-channel data acquisition and analysis. Due to the flexibility of the hardware, firmware, and software architectures, the platform is capable of interfacing with a wide variety of detector modules not only in medical imaging but also in homeland security applications. Analog signals from radiation detectors share similar characteristics - a pulse whose area is proportional to the deposited energy and whose leading edge is used to extract a timing signal.
View Article and Find Full Text PDFPhotolithography-free polymer optical waveguide arrays for optical backplane bus.
Opt Express
July 2011
Department of Electrical and Computer Engineering, the University of Texas at Austin, TX 78758, USA.
In this paper, an innovative 3-to-3 bi-directional optical bus architecture based on multimode polymer waveguides with embedded 45° micro-mirrors was successfully demonstrated. With a lithography-free imprinting process by high quality electroplated metallic mold, the device can be precisely replicated with a low fabrication cost. Superior to any point-to-point optical waveguide, the implemented optical bus structure is capable of broadcasting and receiving high speed data at 10 Gbit/sec among multiple points as a high performance optical backplane.
View Article and Find Full Text PDFArray waveguide evanescent ribbon coupler for card-to-backplane optical interconnects.
Opt Lett
January 2007
New Span Opto-Technology, Inc., Miami, Florida 33173, USA.
A flexible array waveguide evanescent coupler for card-to-backplane optical interconnects is presented. The proposed technique eliminates traditional 90 degrees out-of-plane turns and local waveguide termination of multidrop bus architectures that hinder conventional card-to-backplane optical interconnections. Evanescent coupling between array waveguide ribbons has been successfully demonstrated.
View Article and Find Full Text PDFA free-space optical bus system is described for board-to-board interconnections at the backplane level. The system uses active optoelectronic modules as the interface between the circuit boards and the electrical backplane. Substrate-mode holograms are used to implement signal broadcast operations between boards, and each board on the backplane shares common free-space channels for transmitting and receiving signals.
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