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Kawasaki, Takuro; Harjo, S.; Ito, Takayoshi*; Nakatani, Takeshi; Inamura, Yasuhiro; Aizawa, Kazuya
no journal, ,
Tomoyori, Katsuaki; Kurihara, Kazuo; Tamada, Taro; Kuroki, Ryota
no journal, ,
A new diffractometer data acquisition system will be designed to adopt the distributed structure in DAQ and storage servers. The DAQ system primarily consists of a number of distributed DAQ nodes, storage servers, and of multiple clients that can retrieve and display histogram images on diffraction image viewing software. The index database that manage all distributed data location mediates between storage server (or archiving) and the multiple clients. We will introduce "DAQ-Middleware", which is the standard DAQ software in J-PARC/MLF. The dynamic device control software can concurrently control the neutron optics and sample environment devices as well as the DAQ in the instrument. The instrument control software framework called "IROHA" integrates the DAQ and device control. The compliant software regarding TOF single-crystal neutron diffraction measurements must provide a predictable user interface and functionality sufficient to review diffraction histogram data for the purpose of decision-making by ordering experimenter. Besides these functions, not only the real time (RT) display for monitoring the status of diffraction experiments but also the RT analysis including data corrections as well as peak searching, cell determination, indexing and integration functionality would be considered to be indispensable especially in order to confirm the validity of measurements.
Nakatani, Takeshi; Shinohara, Takenao; Kai, Tetsuya; Segawa, Mariko
no journal, ,
Construction of the Energy-Resolved Neutron Imaging System (RADEN) has started in 2012 at the beam line of BL22 in MLF of J-PARC. This is the first instrument, which is dedicated to the energy-resolved neutron imaging experiments using the pulsed neutron beam, in the world. Several components, such as beam line shields, a new beam shutter, in-shield devices, sample stages and many kinds of the detector system have been installed in 2013, and the first beam will be delivered in November 2014. The main feature of the computing environment is the mass data processing. RADEN will produce the image data which size is about 1TB/day and the computing environment must process this huge data. We will introduce two systems. One is the hierarchy storage system, which consists of the solid state disk and the hard disk connected with the optical fibre network. The other is the imaging analysis system, which consists many GPGPU cards communicated by GPU Direct with InfiniBand.
Nakatani, Takeshi; Inamura, Yasuhiro; Ito, Takayoshi*; Otomo, Toshiya*
no journal, ,
Last year we have planned to upgrade our control software framework which is called "IROHA". We have discussed and designed the improvement points of the conventional IROHA. The points of upgrade are (1) the separation of device control and instrument management, (2) the interface of the MLF Experimental Database for measurement information, (3) platform-independent user interface. Specifically, (1) We redefined that the roles of the device control software are an operation, monitoring and logging of devices and those of the instrument management software are logging of measurements, authorization and certification of users. (2) IROHA automatically produces "Run Information" which indicates the measurement condition and the information is catalogued in the MLF Experimental Database. (3) The user interface of the instrument control including an automatic measurement is based on Web. In this presentation, we will show the detail of the implementation of the new IROHA.
Moriyama, Kentaro; Nakatani, Takeshi
no journal, ,
J-PARC/MLF is the experimental facility for neutron scattering experiments, providing the world highest intensity pulsed neutron. Many neutron instruments equipped with large-area detector and various sample environmental devices are currently in operation. A high intensity beam allows a lot of measurements in short time under a variety of conditions. These measurements produce data of petabyte order per year. In order to reliably manage the enormous data and provide effective data access for scientists, we are developing an integrated data management system, named MLF Experimental Database, based on a commercial XML database system suitable for semi-structured and flexible data such as experimental metadata. It is capable of real-time cataloging of raw data along with experimental metadata and other contextual information, and central management of raw data. The web portal provides data search/browse/download and simple functions for data analysis.