Synthetic plasma edge diagnostics for EMC3-EIRENE, highlighted for Wendelstein 7-X

Area of Science:

• Plasma Physics
• Fusion Energy Research
• Computational Plasma Modeling

Background:

• Spectroscopic measurements in high-temperature plasma edges are challenging to interpret quantitatively due to line-of-sight integration effects.
• Direct interpretation of local emission strengths is often impossible, hindering detailed plasma analysis.

Purpose of the Study:

• To present the capabilities of the EMC3-EIRENE code and a new synthetic diagnostic module for 3D reconstruction of plasma edge signals.
• To demonstrate the application of these tools for analyzing realistic diagnostic setups at Wendelstein 7-X (W7-X).

Main Methods:

• Utilizing the EMC3-EIRENE code, a 3D fluid edge plasma and kinetic neutral gas transport code.
• Developing and employing a versatile synthetic diagnostic module for realistic 3D simulation of plasma edge diagnostics.
• Applying the methodology to simulate data from a visible camera and a coherent-imaging system.

Main Results:

• The EMC3-EIRENE code with the synthetic diagnostic module allows for accurate 3D reconstruction of spectroscopic signals.
• The developed tools successfully capture realistic 3D setups of various plasma edge diagnostics.
• Simulations were performed for a visible camera analyzing recycling and a coherent-imaging system for velocity measurements at W7-X.

Conclusions:

• The EMC3-EIRENE code and synthetic diagnostic module are effective tools for overcoming interpretation challenges in plasma edge spectroscopy.
• These advancements facilitate quantitative analysis of local plasma properties and phenomena.
• The demonstrated applications at W7-X highlight the practical utility for fusion research.