29th Symposium on Fusion Technology (SOFT 2016)

P3.036 Establishing the Wendelstein 7-X steady state control and data acquisition system

7 Sep 2016, 11:00

1h 20m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 36

Poster C. Plasma Engineering and Control P3 Poster session

Speaker

Anett Spring (W7-X Operation)

Description

The W7-X steady state control and data acquisition system has been successfully commissioned and well established to investigate plasma break down and run the first more complex physics programs during the initial operation phase of W7-X. Already in the first weeks of plasma operation, experiment programs with up to 10 minutes containing a series of up to 20 plasma discharges have been run routinely. The main components of W7-X and a list of operational diagnostics have been integrated into the CoDaC system. The control system allows setting up experiment programs using physics oriented parameters which will be transformed to their corresponding technical values. While editing, programs are checked for constraints known in advance. Before and during execution all components report their ability to run the announced program parts as basis for the program’s online feasibility check. Program progress, execution information and components’ states are monitored. Program parameters and execution status are stored with a dedicated program label in the W7-X archive. The data acquisition system continuously acquires both operational machine data and diagnostics data. Trending data can be monitored online. All data is stored with experiment-wide unique timestamps in the W7-X archive, accompanied by parameters and signal descriptions to ensure their traceability. Archived data can be browsed by time interval and signal address. For data analysis routines, all data can be accessed using the dedicated signal access programming interface or a convenient web service. Analysis results as well as measured data from diagnostics not yet integrated into the CoDaC system can be uploaded into the W7-X archive and accessed by the same interfaces. All parts of the CoDaC system have been already in operation during the W7-X commissioning phase assisting commissioning and test of components and diagnostics. The data acquisition system has been running reliably 24/7 for almost two years.