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Updated: May 30, 2025

$High Pressure Single Crystal Diffraction at PX^2$

High Pressure Single Crystal Diffraction at PX^2

Published on: January 16, 2017

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

Dian Lu^1,2, Zhifeng Cheng³, Tianlei Zhao⁴

¹Institute of Plasma Physics, HFIPS, Chinese Academy of Science, Hefei 230031, China.

The Review of Scientific Instruments

|January 29, 2025

Summary

This study evaluates Highly Oriented Pyrolytic Graphite (HOPG) reflectors for tokamak X-ray Crystal Spectroscopy (XCS) using X-Ray Diffractometry (XRD). The method precisely measures HOPG performance, aiding future diagnostic system designs.

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Last Updated: May 30, 2025

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$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

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.