Plasma Current Profile Reconstruction and Tearing Mode Analysis via Intrusive Magnetic Probes in J-TEXT
ID：125
Submission ID：130 View Protection：ATTENDEE
Updated Time：2025-11-03 11:46:41
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Oral Presentation
Start Time：2025-11-09 10:00 （Asia/Shanghai）
Duration：15min
Session：[S1] 1. Renewable energy system » [S1] 1.Renewable energy system
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Abstract
This research implements an intrusive magnetic probe system on the J-TEXT tokamak for internal magnetic diagnosis of plasmas in both stable and tearing-mode-unstable phases. The radially drivable probe array acquired internal measurements of the vertical magnetic field component below the midplane during controlled discharges. For plasmas with coupled tearing modes (2/1 and 3/1), a current filament model constrained by both external Mirnov coils and the internal probe array revealed phase-locked dynamics and quantitatively determined the mode amplitudes. During stable phases, current profile reconstruction was achieved utilizing the measured 
data under the assumption of a circular cross section, demonstrating close agreement with established equilibrium reconstruction benchmarks. This approach provides a unified diagnostic framework for correlated analysis of current profiles and magnetohydrodynamic instabilities while minimizing plasma perturbation.
data under the assumption of a circular cross section, demonstrating close agreement with established equilibrium reconstruction benchmarks. This approach provides a unified diagnostic framework for correlated analysis of current profiles and magnetohydrodynamic instabilities while minimizing plasma perturbation.Keywords
Intrusive magnetic probes, Current filament modeling, Tearing modes, Plasma current reconstruction, J-TEXT tokamak
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