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Data acquisition system for the Belle experiment

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5 Author(s)
Nakao, M. ; Nat. High Energy Accel. Res. Organ., Ibaraki, Japan ; Yamauchi, M. ; Suzuki, S.Y. ; Itoh, R.
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We built a data acquisition system for the Belle experiment at the KEK B-factory. The system is designed to record the signals from the detectors at 500 Hz trigger rate with a less than 10% dead time fraction. A typical event size is 30 kbyte, which corresponds to a data transfer rate of 15 Mbyte/s. The main components are two kinds of detector readout systems, an event builder, an online computer farm and a data storage system. The system has been reliably in operation at the design performance for a half year. We have completed cosmic-ray data taking for 2.5 months and started physics data taking on Jun. 1, 1999

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Real Time Conference, 1999. Santa Fe 1999. 11th IEEE NPSS

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