CCFE is the fusion research arm of the United Kingdom Atomic Energy Authority Real time operation of MAST TS diagnostic S. Shibaev, G. Naylor, R. Scannell,

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Presentation transcript:

CCFE is the fusion research arm of the United Kingdom Atomic Energy Authority Real time operation of MAST TS diagnostic S. Shibaev, G. Naylor, R. Scannell, G. McArdle, and M.J. Walsh New MAST Nd:YAG Thomson Scattering diagnostic provides electron temperature and density measurements in 130 spatial points (1 cm resolution). The measurements are taken with average frequency 240 Hz during the MAST shot.

Event triggering In the standard mode each laser is fired at 30 Hz during the shot. Event-triggering allows measurement with higher time resolution, up to 1  s, during fast plasma phenomena. This mode is supported both in hardware and in the MAST data acquisition system: event information is distributed to all diagnostics. Pellet injection Falling edge of NTM burst

Real – time acquisition When the inter-laser interval is  2 ms MAST TS works in real-time mode: full Te and ne profiles in each time point are distributed to network clients. This is an additional channel; full post-shot processing is always on. RT server client Real-time TS display Total delay from the laser pulse to arrival of the Te/ne profile on the client is 1.3 ms including 0.9 ms of ADC unloading time. Spectrometer room: acquisition and processing.