E. Inoue

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

A Data Acquisition Middleware

We propose a data acquisition middleware called DAQ-Middleware. The DAQ-Middleware will be able to make development of DAQ software easy which runs on many PCs. It consists of RT-Middleware based DAQ components and DAQ studio. The RT-Middleware is a software framework for robot systems and will be an international standard. The DAQ-component is one of the RT-components. The DAQ studio is a tool used for development, debugging and operation of the DAQ-components. We added a new function called RawTCP to improve the performance of data transfer. The performance evaluation is shown. The DAQ-Middleware will be used for neutron experiments in J-PARC, Tokai, Japan.

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

A FASTBUS Processor Interface Using a 68000 Microprocessor

A versatile FASTBUS master utilize a 68000 microprocessor has been developed. The module implements geographical, logical and broadcast addressing and is able to handle the FASTBUS Service Request. The data transfer rate is about 800 kB/sec by using window driver. The logics and test results are described.

Functionality of DAQ-Middleware

Functionality of DAQ-Middleware is presented with an introduction to DAQ-Middleware followed by its features, including a detailed description of DAQ-Components with an example of the architecture, system configuration related to the configuration database and condition database, Web interface, and finally remote booting of DAQ-Components. DAQ-Middleware is already used in experiments at J-PARC (Japan Proton Accelerator Research Complex), Tokai, Japan.

DAQ-Middleware: Progress and status

We report on the progress and status of DAQ-Middleware, a software framework for a distributed data acquisition system. We made improvements in DAQ-Middleware and released package (version 1.0.0) in August 2010. We describe here its improvements in performance and the component development method we used. We also report on the current status of DAQ-Middleware for use at the Material and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC).

Performance measurement of DAQ-Middleware

DAQ-Middleware is a software framework of network-distributed data acquisition system. DAQ-Middleware was developed based on Robot Technology Middleware (RT-Middleware), which is an international standard of Object Management Group (OMG) in Robotics. OpenRTM-aist is an implementation of RT-Middleware developed by the National Institute of Advanced Industrial Science and Technology. New implementation of DAQ-Middleware has been done according to the new OpenRTM-aist released early 2010 while DAQ-Middleware has been improved. Then, we measured the performance of the new DAQ-Middleware compared with previous one. We measured the throughput of DAQ-Middleware on several conditions. We observed improvement of performance in the new DAQ-Middleware.

Prototype performance of distributed DAQ using HORB based on Java

Network programming is very important for next generation of distributed DAQ system. Java has powerful functionality not only in GUI but also in network programming. But, execution speed of Java program is slow on Java interpreter. For evaluating the DAQ parameters, we have investigated various benchmark programs on Java interpreter, Java Just-In-Time compiler and Java native code compiler which generates native codes, and evaluated the performance of them in comparison with that of the C native codes. We found that the performance of the Java native code compiler was nearly as good as that of the C native codes. Hence, a prototype of Java-based DAQ has been developed and evaluated. The result showed that the prototype was fast enough as first stage of the development. Our goal is to establish 3-tier (DAQ client, DAQ server and DAQ database) model for the DAQ.

A Status Report of FASTBUS at KEK

Some FASTBUS modules have been produced and successfully tested at KEK. The test system consisted of a single backplane segment equipped with ancillary logic, two masters driven by the MC68000 microprocessor and two slaves which have several read/write registers. A simple FASTBUS-CAMAC interface is also described.

High speed data acquisition system through mainframe at KEK

The design of the data acquisition system at KEK is described. A CAMAC List driver for the micro‐VAX, VME/OS‐9 and PC/MS‐DOS operating systems, the data transfer system from front‐end computer to mainframe, and the module by module upgrade of the data transfer system are described. (AIP)