A reconstruction method based on evolution of partial differential equation for the Laser-driven Ion-beam Trace Probe...

Area of Science:

• Plasma physics
• Fusion energy research
• Diagnostic techniques

Background:

• Tokamak devices require accurate measurement of poloidal magnetic fields (B_p) for plasma control.
• Existing diagnostic methods face limitations in precision and applicability.
• The Laser-driven Ion-beam Trace Probe (LITP) offers a novel approach to B_p measurement.

Purpose of the Study:

• To develop and validate a tomography method for reconstructing B_p using LITP data.
• To assess the impact of specific terms in the reconstruction algorithm on accuracy.
• To enhance the reliability of B_p diagnostics in tokamak environments.

Main Methods:

• Implementation of a tomography method based on solving partial differential equations.
• Inclusion of diffusion and perturbation terms to manage divergence and smooth results.
• Numerical simulations to evaluate the effectiveness of the proposed reconstruction technique.

Main Results:

• The tomography method successfully reconstructed B_p from LITP measurements.
• Both diffusion and perturbation terms significantly improved the quality of B_p reconstruction.
• The enhanced method demonstrated reduced divergence and smoother output compared to standard approaches.

Conclusions:

• The developed tomography method, incorporating diffusion and perturbation terms, is effective for B_p reconstruction with LITP.
• This advancement offers a more robust and accurate diagnostic tool for tokamak research.
• The findings contribute to improved understanding and control of magnetic fields in fusion devices.