Visualization of the Plasma Shape in a Force Free Helical Reactor, FFHR

Hu, Kunqi; Wang, Qixiong; Koyamada, Koji; Ohtani, Hiroaki; Goto, Takuya; Miyazawa, J.

doi:10.15748/jasse.7.151

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…In our previous research [9], we studied the plasma shape by generating a 3D model through magnetic field lines, all of which were directly integrated into a scalar field. The MC method was used to detect an isosurface of this scalar field.…”

Section: Surface-based Methodsmentioning

confidence: 99%

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Visualization of plasma shape in the LHD-type helical fusion reactor, FFHR, by a deep learning technique

Koyamada

Ohtani

et al. 2021

J Vis

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A magnetic field is used to confine the plasma to achieve controlled fusion. Therefore, since the movement of the plasma follows magnetic field lines, a plurality of magnetic field lines is calculated from electromagnetic field simulation results in a fusion reactor. Because of the complicated distribution of magnetic field lines in three-dimensional (3D) space, existing analysis measures which are mostly based on two-dimensional poloidal plasma cross-sections are unsatisfactory for domain experts. To solve this problem, we propose a technique for reconstructing a regular scalar field from the magnetic field lines. First, on poloidal plasma cross-sections, intersection points of magnetic field lines are used to make annotations of learning the plasma shape. Then, a deep neural network is built to approximate the scalar field that represents the probability of the existence of magnetic field lines. Consequently, a 3D model of plasma shape has managed to be constructed by applying the marching cubes method. The effectiveness of the proposed method is demonstrated by comparing it with the conventional method and domain experts' reviews.

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Section: Surface-based Methodsmentioning

confidence: 99%

“…Compared with the approach in our previous paper [9], the DNN approach solves the existing integrity and margin problem. The DNN approach has fewer processing procedures on the Larmor radius.…”

Section: Three-dimensioal Model Performancementioning

confidence: 99%