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Real time operation of MAST TS diagnostic

Real time operation of MAST TS diagnostic. 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.

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Real time operation of MAST TS diagnostic

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

  2. 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 ms, during fast plasma phenomena. Pellet injection Falling edge of NTM burst This mode is supported both in hardware and in the MAST data acquisition system: event information is distributed to all diagnostics.

  3. Real – time acquisition • When the inter-laser interval is  2 ms MAST TS works in real-time mode: full Te and neprofiles in each time point are distributed to network clients. • This is an additional channel; full post-shot processing is always on. client RT server client Real-time TS display Spectrometer room: acquisition and processing. 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.

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