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Switchless event building farm for the belle data acquisition system

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10 Author(s)
Nakao, M. ; High Energy Accelerator Res. Organ., Tsukuba, Japan ; Itoh, R. ; Suzuki, S.Y. ; Yamauchi, M.
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We designed a switchless event building farm for the Belle experiment at the KEKB e/sup +/e/sup -/ collider, as a replacement of the existing event builder and the online farm systems. In the new system, PCs are directly interconnected with multiple point-to-point Fast and Gigabit Ethernet connections. The PCs build the detector data in two steps to perform distributed event processing. We set up a test system and confirmed the event building performance meets our new requirements using a realistic prototype software. The system is being installed as scheduled using the summer shutdown time in 2001.

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Nuclear Science, IEEE Transactions on  (Volume:48 ,  Issue: 6 )