Plasma radiation dynamics with the upgraded Absolute Extreme Ultraviolet tomographical system in the Tokamak à...

Area of Science:

• Plasma Physics
• Fusion Energy Research
• Diagnostic Technology

Background:

• High-temperature plasmas in fusion devices generate intense radiation.
• Investigating fast radiative processes is crucial for understanding plasma behavior.
• Existing diagnostic systems on Tokamak à Configuration Variable (TCV) have limitations in observing certain phenomena.

Purpose of the Study:

• To introduce an upgraded tomographical system using Absolute Extreme Ultraviolet (AXUV) detectors for enhanced plasma radiation analysis.
• To improve the investigation of fast radiative processes in magnetically confined plasmas.
• To reveal the coupling between core plasma radiation and plasma-wall interactions.

Main Methods:

• Installation of an upgraded tomographical system with AXUV detectors on the TCV tokamak.
• Implementation of movable shutters for detector protection.
• Modifications to correct original design errors and enhance data evaluation techniques.
• Monitoring of detector sensitivity degradation due to plasma radiation.

Main Results:

• The upgraded system effectively monitors fast radiative processes in high-temperature plasmas.
• Severe short-term sensitivity degradation of AXUV detectors was observed and quantified.
• Results are consistent with existing plasma radiation diagnostics on TCV.
• The system successfully revealed the coupling between core plasma radiation and plasma-wall interaction.

Conclusions:

• The upgraded AXUV tomographical system provides valuable insights into plasma radiation dynamics.
• The system's ability to detect core plasma radiation and plasma-wall interaction coupling is a significant advancement.
• The findings contribute to a better understanding of plasma behavior in fusion devices.