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Modelling of Backscattering off Filaments Using the Code IPF-FD3D for the Interpretation of Doppler Backscattering
Alexander Yashin1,2, Natalia Teplova1,2, Georgiy Zadvitskiy3
1Plasma Physics Department, Peter the Great Saint Petersburg Polytechnic University, 195251 Saint Petersburg, Russia.
Sensors (Basel, Switzerland)
|December 11, 2022
Summary
Investigating plasma filaments using Doppler backscattering (DBS) on the Globus-M/M2 tokamak, this study models filament behavior to improve data analysis and understand particle and energy losses in fusion devices.
Area of Science:
- Plasma physics
- Fusion energy research
- Tokamak diagnostics
Background:
- Filaments and blobs significantly impact particle and energy losses in tokamak plasmas.
- Understanding these peripheral plasma structures is crucial for L-mode and H-mode confinement.
- The Doppler backscattering (DBS) diagnostic shows sensitivity to filaments but presents analysis challenges.
Purpose of the Study:
- To develop and apply computational modeling for analyzing DBS signals from plasma filaments.
- To investigate the characteristics and motion of filaments in tokamak edge plasmas.
- To enhance the interpretation of DBS diagnostic data for improved plasma understanding.
Main Methods:
- Utilized the IPF-FD3D code for plasma filament modeling.
- Simulated filament backscattering using DBS principles.
- Investigated circular and other filament shapes in both slab and realistic tokamak geometries.
- Analyzed filament motion in poloidal and radial directions.
Main Results:
- The study successfully modeled DBS signal responses to various filament structures.
- Identified key filament characteristics influencing DBS signals.
- Provided insights into filament dynamics, including poloidal and radial movement.
- Demonstrated the utility of modeling for DBS data interpretation.
Conclusions:
- Computational modeling is essential for deciphering complex DBS signals from plasma filaments.
- This approach aids in understanding filament contributions to energy and particle transport in tokamaks.
- The findings support the use of DBS diagnostics coupled with modeling for advanced fusion plasma research.
