Performance characterization of x-ray crystal spectroscopy highly oriented pyrolytic graphite reflectors based on...

Area of Science:

• Plasma physics and fusion energy research.
• Materials science and characterization.
• X-ray optics and instrumentation.

Background:

• Next-generation tokamaks, like ITER, require advanced diagnostic systems.
• X-ray Crystal Spectroscopy (XCS) is crucial for plasma diagnostics.
• Highly Oriented Pyrolytic Graphite (HOPG) is a candidate material for XCS reflectors.

Purpose of the Study:

• To experimentally evaluate the performance of HOPG reflectors for XCS systems.
• To establish a precise method for characterizing HOPG reflector properties.
• To support the design of future tokamak diagnostic systems.

Main Methods:

• Utilized X-Ray Diffractometry (XRD) for experimental evaluation.
• Measured angular responses and reflectivities of HOPG samples.
• Conducted a demonstrative XRD experiment to validate the methodology.

Main Results:

• The XRD method provides accurate angular response data for HOPG reflectors.
• Reflectivity measurements of HOPG were successfully obtained.
• The experimental approach is suitable for detailed HOPG characterization.

Conclusions:

• The XRD method is effective for evaluating HOPG reflector performance in XCS.
• Precise characterization of HOPG is essential for designing reliable tokamak diagnostics.
• This study facilitates the development of advanced XCS systems for fusion devices.