Details

Autor(en) / Beteiligte

• Reich, M.
• Bilato, R.
• Mszanowski, U.
• Poli, E.
• Rapson, C.
• Stober, J.
• Volpe, F.
• Zille, R.

Titel

Real-time beam tracing for control of the deposition location of electron cyclotron waves

Ist Teil von

• Fusion engineering and design, 2015-11, Vol.100, p.73-80

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •We successfully integrated a real-time EC beam tracing code at ASDEX Upgrade.•The calculation of EC beam deposition location is fast enough for control purposes.•The accuracy of the deposition location calculation exceeds equivalent measurements.•The implementation method is by design portable to larger fusion devices. Plasma control techniques that use electron cyclotron (EC) resonance heating and current drive such as control of neoclassical tearing modes require accurate control of the deposition location of EC beams. ASDEX Upgrade has successfully implemented a real-time version of the beam-tracing code TORBEAM into its real-time diagnostic system to act as a globally available module that calculates current deposition location and its sensitivity from other real-time diagnostic measurements for all its moveable EC wave launchers. Based on a highly (100×) accelerated version of TORBEAM, the software implementation as a diagnostic process uses parallelization and achieves cycle times of 15–20ms for determining the radial deposition location of 12 beams in the plasma. This cycle time includes data input–output overhead arising from the use of available real-time signals. The system is by design portable to other machines such as ITER.