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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
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x-ray irradiation analysis based on wavelet transform in tokamak plasma.
K Ghanbari1, M Ghoranneviss1, A Salar Elahi1
1Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Journal of X-Ray Science and Technology
|November 20, 2014
Summary
Controlling hard x-ray emission from runaway electrons in tokamaks is crucial. External electric and magnetic fields, specifically a biased limiter and Resonant Helical Field, effectively reduce Magneto-Hydro-Dynamic activity and hard x-ray intensity.
Area of Science:
- Plasma physics
- Fusion energy research
- Tokamak operational stability
Background:
- Hard x-ray emission from runaway electrons poses a significant challenge for tokamak plasma operations.
- Reducing runaway electron populations is essential for safe and efficient tokamak functioning.
Purpose of the Study:
- To investigate the impact of external electric and magnetic fields on hard x-ray intensity.
- To analyze the influence of a positive biased limiter and Resonant Helical Field (RHF) on Magneto-Hydro-Dynamic (MHD) activity and runaway electron emissions.
Main Methods:
- Utilized Wavelet transform for analyzing MHD fluctuations and hard x-ray intensity.
- Compared data with and without the application of external fields (biased limiter and RHF).
Main Results:
- External electric and magnetic fields demonstrably influence MHD activity.
- Application of the biased limiter and RHF led to a reduction in MHD activity and hard x-ray intensity.
Conclusions:
- External fields offer a viable method for controlling MHD activity.
- Controlling MHD activity via external fields provides a pathway to mitigate hard x-ray emission from runaway electrons in tokamaks.
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