Filterscope diagnostic system on the Experimental Advanced Superconducting Tokamak (EAST)

Area of Science:

• Plasma physics
• Fusion energy research
• Spectroscopy

Background:

• Tokamak devices are crucial for fusion energy research.
• Understanding plasma behavior, especially edge localized modes (ELMs) and H-mode plasmas, is vital for stable fusion reactions.
• Advanced diagnostic tools are needed to capture fast plasma dynamics.

Purpose of the Study:

• To implement and utilize a filterscope diagnostic system for observing plasma emissions.
• To monitor multiple spectral lines and bremsstrahlung radiation simultaneously.
• To enhance the study of edge localized modes and H-mode plasmas in tokamaks.

Main Methods:

• A filterscope diagnostic system was mounted on the Experimental Advanced Superconducting Tokamak.
• Observed line emission and visible bremsstrahlung radiation at various wavelengths (e.g., Dα, He ii, W i).
• Digitized multi-channel signals at up to 200 kHz for high temporal resolution.

Main Results:

• Successfully monitored multiple emission lines and bremsstrahlung radiation from tokamak plasma.
• Acquired simultaneous, high-temporal-resolution data (up to 200 kHz).
• Demonstrated the system's capability to capture detailed plasma phenomena.

Conclusions:

• The filterscope diagnostic system is effective for plasma emission observation.
• The system provides crucial data for understanding edge localized modes and H-mode plasmas.
• High temporal and spatial resolution of the diagnostic system are key for fusion research.