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[en] A data-acquisition approach with fast digitizers at the earliest possible stage is discussed. Event selection is achieved digitally in an asynchronous, distributed way using modular system components. Experiment tuneup down to the very first level is under full computer control. One of the already realized system components, a fast time digitizer (with 650 ps resolution, 8 channels, 32 bits) is briefly described. (orig.)
[en] A Data Acquisition System using the Domino Ring Sampler chip is being developed for use in the Magic experiment. We present the main features of this system and the results of a test on the Magic-I telescope
[en] In the new KLOE2 experiment, at DAΦNE particle accelerator of LNF-INFN, a pair of tagger detectors will be installed in order to investigate gamma-gamma physics. We shall need to acquire a 32 bits pattern for each detector and to allow a high time-resolution event reconstruction with KLOE data. The acquisition system will be implemented with Virtex-5 FPGA in order to avoid expensive TDC. The real time sampling and holding system, reference providing system, memorization and transfer data system will be described.
[en] Design considerations for low noise charge measurement and their application in CMOS electronics are described. The amplifier driver combination whose noise performance has been measured in detail as well as the analog multiplexing silicon strip detector readout electronics are designed with low power consumption and can be operated in pulsed mode so as to reduce heat dissipation even further in many applications. (orig.)
[en] Fibre Channel equipment has been evaluated in the environment of the ATLAS DAQ prototype '-1'. Fibre Channel PCI and PMC cards have been tested on PowerPC-based VME processor boards running LynxOS and on Pentium-based personal computers running Windows NT. The performance in terms of overhead and bandwidth has been measured in point-to-point, arbitrated loop and fabric configuration with a Fibre Channel switch. The possible use of the equipment for event building in the ATLAS DAQ prototype '-1' has been studied
[en] The data acquisition system of a large-scale experiment such as UA1, running at the CERN proton-antiproton collider, has to cope with very high data rates and to perform sophisticated triggering and filtering in order to analyze interesting events. These functions are performed by a variety of programmable units organized in a parallel multiprocessor system whose central architecture is based on the industry-standard VME/VMXbus. (orig.)
[en] The CMS collaboration is currently investigating various networking technologies that may meet the requirements of the CMS Data Acquisition System (DAQ). During this study, a peer transport component based on TCP/IP has been developed using object-oriented techniques for the distributed DAQ framework named XDAQ. This framework has been designed to facilitate the development of distributed data acquisition systems within the CMS Experiment. The peer transport component has to meet 3 main requirements. Firstly, it had to provide fair access to the communication medium for competing applications. Secondly, it had to provide as much of the available bandwidth to the application layer as possible. Finally, it had to hide the complexity of using non-blocking TCP/IP connections from the application layer. This paper describes the development of the peer transport component and then presents and draws conclusions on the measurements made during tests. The major topics investigated include: blocking versus non-blocking communication, TCP/IP configuration options, multi-rail connections
[en] The CDF data acquisition (DAQ) system requires an upgrade to enable it to handle data rates of 1 kHz or more from the front-end to Level3. The current UltraNet network will have to be replaced, and one possibility is to do so with a scalable optical switching network. This paper discusses such a possibility. (orig.)
[en] A major upgrade to the KOTO detector data acquisition system based on the ATCA standard is being considered. The ATCA standard provides a natural solution to the current KOTO constraints, including communication between boards and higher input and output bandwidth.