Speaker
Description
The JET control and data acquisition system (CODAS) is an integrated system that provides
all the pulse based and continuous data acquisition, real time and slow control and control
room interfaces for JET. It has a long history, dating back to the beginning of JET in 1980. It
utilises both commercially available hardware along with many in-house modules. The
software has grown up and evolved largely independently of other developments in big
science. Similarly, the data acquisition system on MAST has a long history of evolution from
previous facilities at Culham (COMPASS). It utilises commercially available and in-house
hardware (some shared with JET CODAS) and software that has developed largely
independently of JET and other external developments. More recently, we have begun to
adopt some ITER CODAC relevant technologies on both JET and MAST, in part, to also
introduce some standardisation between the two facilities. This started with a pilot project
to create a cubicle and environment monitoring system using commercial hardware and
EPICS monitoring and HMI. We have since gone on to implement several camera and
spectrometer filter controllers, several types of turbomolecular pump controller, and
various radiation protection monitors in EPICS on JET. We are also implementing a central
information display system for MAST that links the OPC interface on the machine control
through to several display screens showing the machine state using EPICS. We have several
MARTe based real time applications on JET and are now developing an application to
provide real time proceeding of high-resolution Thomson scattering data using MARTe V2
(an ITER/F4E initiative to improve the robustness of this real-time framework). We are also
considering upgrading the existing MARTe applications to this version. On JET we have also
started to use another ITER CODAC technology – SDN to supplement the ATM based real
time control network on JET. Initially, as a proof of principle, a real time plasma profile
display was implemented. This system is now being extended to include several real time
data sources which will feed their data back into the ATM network and on to the real time
controllers. Looking forward, we anticipate extending the JET real time network with a
purely ITER CODAC/SDN connected real time control system and provide a richer ITER
CODAC interface to the JET CODAS to accommodate the possibility of ITER diagnostics
testing and provide a real stress test for ITER archiving technologies.
