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Published on: October 11, 2016
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2-D soft x-ray arrays in the EAST
Kaiyun Chen1, Liqing Xu1, Liqun Hu1
1Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China.
The Review of Scientific Instruments
|July 3, 2016
Summary
A new soft x-ray (SXR) imaging system on EAST provides high-resolution plasma views. It studies magnetohydrodynamics and impurity transport, enabling detailed tomographic reconstructions.
Area of Science:
- Plasma Physics
- Fusion Energy Research
- Diagnostic Technology
Background:
- Understanding magnetohydrodynamics (MHD) activities and impurity transport is crucial for fusion energy development.
- High spatial and temporal resolution diagnostics are needed to observe complex plasma phenomena.
- The Experimental Advanced Superconducting Tokamak (EAST) requires advanced tools for plasma analysis.
Purpose of the Study:
- To install and utilize a high spatial and temporal resolution soft x-ray (SXR) imaging diagnostic on EAST.
- To study magnetohydrodynamics (MHD) activities and core high-Z impurity transport in tokamak plasmas.
- To enable detailed 2-D tomographic reconstructions of plasma behavior.
Main Methods:
- Installation of an SXR imaging diagnostic with 122 lines of sight from three directions.
- Application of the Fourier-Bessel method based on flux coordinates for 2-D tomographic reconstruction.
- Analysis of plasma events including sawtooth crashes, edge localized modes (ELMs), and high-Z impurity transport.
Main Results:
- The SXR diagnostic successfully captured detailed plasma dynamics with high spatial and temporal resolution.
- Observed phenomena include characteristic sawtooth crash patterns and periodic bursts of edge localized modes (ELMs).
- The system provided insights into the transport of high-Z intrinsic impurities within the plasma core.
Conclusions:
- The new SXR imaging diagnostic is a valuable tool for studying MHD activities and impurity transport on EAST.
- Detailed tomographic reconstructions enhance the understanding of plasma physics in fusion devices.
- The diagnostic's capabilities support advancements in fusion energy research.
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