Go to Home Page
CHEP INFORMATION
Bulletins
Committees
Scientific Program
Docs by topics
Social events
Conference location
Secretariat
GRID INFORMATION
 • Grid WShop & Tutorial
 • Grid Program
USEFUL LINKS
 • Visiting Padova
 • INFN Padova
 • University of Padova
 • CHEP: '94 '95 '97 '98

Last update: Apr 1, 2000

to first abs  to previous absby abs number to next abs  to last abs

 

to first abs on this KT  to previous abs on this KTon same keytopic to next abs on this KT  to last abs on this KT


B219

BELLE DAQ System - Status and Future

Ryosuke Itoh1, Masanori Yamauchi1, Mikihiko Nakao1, SOh Suzuki2, Hirofumi Fujii1, Eunil Won1, Takeo Higuchi3, Masashi Hazumi4, Takahiro Houjo4
  1. Institute of Particle and Nuclear Studies, KEK
  2. Computing Research Center, KEK
  3. Department of Physics, University of Tokyo
  4. Department of Physics, Osaka University

Speaker: Ryosuke Itoh

  The BELLE experiment started taking data from June 1999 for the study of the CP violation in B meson decays. The DAQ system for BELLE was designed so that it could handle the trigger rate up to 500Hz with the event size of 30KB. The system consists of the unified readout system based on the Q-to-T conversion, the event builder, the online computer farm and the data transfer system to a mass storage. It is now operated at the average trigger rate of 200Hz without any serious problem. The performance of the system under this condition is reported. In particular, the data processing in the down stream of the DAQ system is discussed in detail, which includes the L3 trigger and the data monitoring scheme. In the latter part of the talk, a future upgrade plan of the DAQ system is described. The plan is to replace the current event builder, the online computer farm and the data transfer system with a bunch of PC servers connected with 100base-T network. The R&D status on the upgrade is reported.

Presentation:  Adobe Acrobat pdf 



  | Top | Home | Bulletins | Committees | Scientific Program | Docs by topics | Social Event | Conference Location | Secretariat |