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Automatic location of disruption times in JET
The Review of Scientific Instruments
|November 29, 2014
Summary
Disruptions in tokamak plasmas can damage devices. A new method automatically identifies disruption time by tracking the current quench, improving accuracy and reducing human effort for fusion energy research.
Area of Science:
- Plasma physics
- Fusion energy research
- Nuclear engineering
Background:
- Tokamak plasma disruptions pose significant risks to fusion devices due to severe electromagnetic and thermal loads.
- Traditional disruption time determination using thermal quench is unreliable with metallic ITER-like walls (JET-ILW).
Purpose of the Study:
- To implement an automated method for accurately determining tokamak plasma disruption times.
- To establish a new, reliable criterion for disruption time identification in the presence of metallic walls.
Main Methods:
- Developed an automatic data processing algorithm to detect the onset of the current quench.
- Applied the new criterion to experimental data from JET with a metallic wall.
Main Results:
- Successfully implemented an automated system for disruption time estimation.
- The new method reliably identifies disruption events by pinpointing the start of the current quench.
Conclusions:
- The start of the current quench is a more robust indicator of tokamak plasma disruptions with metallic walls.
- Automated disruption time determination reduces human effort and enhances the reliability of fusion disruption analysis.
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