Micro-spectrometer for fusion plasma boundary measurements.

Area of Science:

• Plasma Physics
• Fusion Energy Research
• Diagnostic Instrumentation

Background:

• Tokamak edge plasmas require accurate diagnostics for operational control and understanding.
• Existing diagnostic methods for ion energy spectra can be resource-intensive or lack spatial resolution.
• Development of compact, in situ probes is crucial for advancing fusion energy science.

Purpose of the Study:

• To develop and present the fabrication and testing results of novel in situ ion spectrometers.
• To enable direct, spatially resolved measurements of ion energy spectra in tokamak edge plasmas.
• To create a compact, easily replaceable diagnostic with minimal resource demands.

Main Methods:

• Fabrication of a combined collimator and energy analyzer from silicon.
• Integration of the silicon element with a suitable detector.
• Testing of the fabricated collimator and energy analyzer component.

Main Results:

• Successful fabrication of the combined collimator and energy analyzer element.
• Demonstration of the compact form factor (approx. 2.0 cm × 1.5 cm × 0.2 cm).
• Initial testing results indicate the viability of the developed spectrometer design.

Conclusions:

• The developed in situ ion spectrometer design is promising for tokamak plasma diagnostics.
• The compact and replaceable nature of the probes addresses key limitations of current methods.
• Further testing and integration are expected to validate their performance in operational tokamak environments.