Abstract
The operation protocols for the TJ-II require that all diagnostics be controlled remotely during machine operation. For this reason, most diagnostics have control systems that permit remote actions to be performed on their various subsystems. An Internet browser, which connects to a server where the human machine interfaces (HMIs) for all diagnostics are situated, is used for this. Real time control has been resolved using programmable automates for each diagnostic. Dedicated application software is in operation to provide a user interface for programming digitisers, for signal visualisation and for data processing during TJ-II discharges. This software is an event-based application that can be remotely launched from any X terminal. Other resources provided to users are graphical and computational tools for data analysis, data compression, off-line access to databases, reception of data and its integration in the databases at any moment. Two neutral particle analysers (NPAs) are operating on TJ-II to measure the energy spectra of charge exchange (CX) neutral particles. Protocols require remote control over several actions and subsystems of this diagnostic. With all these tools a proof of the concept of remote participation has being performed during the present experimental campaign. The NPA diagnostic has been operated from UPC-ETSEIB in Barcelona, 600 km of distance from the machine.
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