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Web apps for profile fitting and power balance analysis at Wendelstein 7-X.
M Wappl1, S A Bozhenkov1, M N A Beurskens1
1Max Planck Institute for Plasma Physics, Greifswald 17491, Germany.
The Review of Scientific Instruments
|September 18, 2024
Summary
New web apps, Profile Cooker and Power House, simplify W7-X stellarator data analysis for power balance and profile fitting. This enables a comprehensive database of experimental results, aiding fusion energy research.
Area of Science:
- Plasma physics
- Fusion energy research
- Stellarator technology
Background:
- Accurate analysis of experimental data from fusion devices like the Wendelstein 7-X (W7-X) stellarator is crucial for advancing fusion energy.
- Existing methods for profile fitting and power balance analysis can be complex and time-consuming, hindering efficient data processing.
Purpose of the Study:
- To introduce two novel web applications, Profile Cooker and Power House, designed to streamline the analysis of W7-X experimental data.
- To facilitate the creation of a comprehensive database of experimental power balance results.
- To investigate the impact of turbulent transport coefficients and neoclassical effects on power balance.
Main Methods:
- Development and implementation of Profile Cooker for profile fitting with a comparison of various fitting functions.
- Development and implementation of Power House for power balance analysis, including the discussion of its constituent terms.
- Calculation of neutral beam power deposition using a dedicated model based on experimental profiles.
- Global neoclassical simulations using the EUTERPE code to understand neoclassical root transitions.
Main Results:
- Profile Cooker and Power House offer a user-friendly, browser-based graphical interface for W7-X data analysis.
- A model for rapid calculation of neutral beam power deposition has been established.
- The study highlights the challenges posed by neoclassical root transitions and radial electric field uncertainty in power balance analysis.
- Simulations provide insights into neoclassical root transitions for experimental W7-X profiles.
Conclusions:
- The developed web applications significantly enhance the efficiency of W7-X data analysis for profile fitting and power balance.
- Understanding turbulent transport coefficients and neoclassical effects is vital for accurate fusion plasma modeling.
- Further research into neoclassical effects is necessary for robust power balance assessments in stellarators.
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