Using VXIbus-based DAQs for basic research and unattended monitoring applications
Paper: 264
Session: B (talk)
Speaker: Bazhenov, Alexander, Petersburg Nuclear Physics Institute, Gatchina
Keywords: C++, data acquisition systems, mixed language programming, networking, parallelization
Using VXIbus-based DAQs for basic research and
unattended monitoring applications
Author name(s) come here
A BAZHENOV, YU SOBOLEV, V SOLOVEI, A BUSHNEV, I DIAKOV
- PETERSBURG NUCLEAR PHYSICS INSTITUTE, RUSSIA
R ARLT, W LEWIS
-INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
R WILSON
HARVARD UNIVERSITY, USA
We are using VXIbus - based system to build data acquisition systems
both for basic research and IAEA unattended monitoring systems.
A first one is the distributed VXIbus system to measure circular polarization
of gamma-quanta in the capture of polarized cold neutrons by protons.
It inludes essentially 2 full-size VXI crates to work with 2 arms of mosaic
BGO gamma-spectrometer.
High voltage detector power supply and service things are provided with
devices in CAMAC standard.
Everything is build around LAN with remote control from the user graphics
terminal.
Data acquisition is written under QNX real-time operating system within
Photon graphical enviroment.
The work is at stage of the measurements.
We process 10^6 gamma-quanta per second with 12-bit energy resolution.
The accuracy of 10^-5 in gain stabilizing against magnetic field was
demonstrated.
Unattended monitoring system for IAEA tasks is the very specifics field.
Unitteruppted data acquisition have to be continous for month even with
mains power outage and have to restore it automatically.
The status of the researh is the design study to work out recommendations
for the Member State Support Programs.
We developed the generic VXI module for this task and implement the demo
software at the VXI bus master.
VXI module is the 8-channel counter with non-volatile real-time clock
and buffer memory, external UPS support, trigger output built around mc68000
processor under the control of monolithic software.
Software at VXIbus controller is under Windows NT OS.
Now we are upgrading the module level with more powerful 68030 processor and
OS-9 real-time OS.
At the system level we are adding the remote access to NT node.
We plan to update the system in the first half of 1997.