Author/Authors :
Suzuki، نويسنده , , Soh Yamagata and Itoh، نويسنده , , Ryosuke and Kim، نويسنده , , Hyun-Woo and Kim، نويسنده , , Hong-Joo and Kim، نويسنده , , Hyun-Ok and Nakao، نويسنده , , Mikihiko and Won، نويسنده , , Eunil and Yamauchi، نويسنده , , Masanori، نويسنده ,
Abstract :
We renewed the data acquisition system for the Belle experiment. Previous data acquisition system, which has been used since December 1998, did not have level 2 trigger facility. To improve the data reduction factor and total throughput, we replaced event builder, online computer farm and the storage system. The event builder and online computer farm are unified into one system. This event building farm uses commodity hardware and newly appended level 2 trigger functionality. This data acquisition system started its operation since last autumn and is very stable. We took 36 fb−1 with new DAQ system, it had already overtaken 30 fb−1 that is total amount of previous DAQ system.
