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Prospects for Developing the
Data Acquisition Systems and Computing Infrastructure of the IBR-2
Complex
A.S. Kirilov, F.V. Levchanovsky,
V.I. Prikhodko
Joint Institute for Nuclear Research, Dubna, Russia
In the period 2003-2009 in the Frank Laboratory of
Neutron Physics JINR will be carry out the total modernization of the
IBR-2 pulsed reactor which is mainly used for investigations in
condensed matter physics using thermal neutron scattering. In the
mentioned period the development of new and modernization of existing
neutron spectrometers are planned also. In this connection in FLNP
7-years program of the development of DAQ system and computing
infrastructure was developed. The main directions of these works:
- Integration of PCs into the structure of VME
DAQ-systems to provide friendly user interface in comfortable
Windows environment and to use efficiently of PC software designing
in FLNP and other neutron centres for primary processing and
analysis of data.
- Integration of modular PCS into separate measurement
and control subsystems and creation of PC mini-farms for controlling
spectrometers and data processing.
- Development of new, specific for neutron experiments,
electronic blocks with improved characteristics with due regards to
natural progress in designing and manufacturing of electronic
components.
This will make it possible:
- to increase the counting rate of registering systems
up to 107-108 events/s;
- to extend the histogramming memory volume up to tens
of G bytes;
- to improve the accuracy of measurements and to
increase the number of registered and controlled parameters;
- to used more sophisticated algorithms for correcting
and processing data, etc.
- Galvanic isolation of detector electronics.
- Reduction of the number of our own developments and
orientation to a wide application of industrial standards and
systems, as well as commercial software products.
Application of new technologies for designing
DAQ-systems, primarily mezzanine and network technologies.
FLNP LAN at the present moment has a
modern structure and consists of more than 500 nodes (PCs
workstations and servers), connected via optical and twisted pair
cables with data transfer rate up to 100 Mbit/s. The central element
of LAN is CISCO router 8510.
The main objective of further LCN
development is to design a fully redundant high-speed core by means
of installation second router 85xx… The availability ot two
routing switches and duplicated trunk communication channels will
permit a gradual changeover to the Gigabit Ethernet technology. In
addition, there will be a possibility of automatic load distribution
over the communication channels on the basis of traffic
classification. In the case of failure of the network core
components, the data transfer will be resumed in a few seconds. The
failure-resistance in this network structure will be provided: on
physical level - by the availability of no less than two connection
from each node; on logical level - by using protocols, which make it
possible to re-direct data flows if the connection fail.
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