Upgrading the backend of the pipeline readout system for Belle II
The Belle II experiment at KEK will be a successor to the Belle experiment. Belle II will start operation from 2015, searching for subatomic particles beyond the standard model. The pipeline readout system for the Belle experiment will be unable to satisfy the requirements of Belle II, because the luminosity of the SuperKEKB accelerator will be about 40 times higher than that of KEKB. We have moved the digitizer to front-end electronics and upgraded the back-end part, as well as replacing the processor on the readout module. We report here the upgrade plan and the throughput of the back-end part.
A common data acquisition system for high-intensity beam experiments
The J-PARC facility, which will be ready in 2008, is being constructed to perform a number of experiments including nuclear physics, kaon decays and neutrino oscillation. The expected data acquisition rate ranges from 500 Hz to 10 kHz, which is significantly higher than those used in the existing small experiments at KEK. We have developed a new data acquisition system that can be used in a wide range of experiments at J-PARC. The system consists of a KEK-VME crate, a readout platform module and peripheral modules. The readout platform module is highly modularized, having four slots to install daughter cards for digitization and three PCI mezzanine card (PMC) slots for on-board data processing and other purposes. The performance of the platform module and a model setup of the data acquisition system are reported
Data Flow Simulations through the ATLAS Muon Front-End Electronics
A VerilogHDL simulation of the data flow along the readout chain of the ATLAS MDT front-end is presented. The input rates for this simulation are taken from the chamber occupancies as provided by the ATLAS physics Monte Carlo. The chamber hit-rates include backgrounds as well as hits for collisions of interest. The program has been used to study various trigger tower groupings and to examine the buffer occupancies at a range of luminosities.