Searcharxiv⌕ Search
Home/Archive/arXiv

arXiv · 2610.33529

A Novel Linked-Mirror Device for Fusion

Haorong Qiu·Xiang Li·Guodong Yu·Zhexuan Zheng·Caoxiang Zhu·Guoyong Fu
View original source ↗Read source document ↗Export metadata ↓

Abstract

We design a novel linked-mirror device (LMD) with a magnetic well using the near-axis expansion (NAE) method. The design consists of two parallel straight mirror sections connected at both ends by three-dimensional stellarator-like magnetic fields , thereby eliminating the end-loss problem of a single magnetic mirror. By designing appropriate three-dimensional magnetic fields, we obtain an LMD configuration with a magnetic well, ensuring stability against interchange modes. The existence of finite-\b{eta} equilibria of the LMD is demonstrated by numerical solutions of the 3D equilibrium code GVEC. This design is potentially a novel solution to magnetic confinement for fusion reactors.

Explore related subjects

physics.plasm-ph

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Haorong Qiu, Xiang Li, Guodong Yu, Zhexuan Zheng, Caoxiang Zhu, Guoyong Fu. 2026-10-24. A Novel Linked-Mirror Device for Fusion. https://arxiv.org/abs/2610.33529

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Control of the bootstrap current in approximately quasi-axisymmetric magnetic fields

Quasi-axisymmetric stellarators are the stellarator analogue of axisymmetric tokamaks, retaining many of their favorable confinement properties, their compactness and their relative coil simplicity, while avoiding their principal limitation, the need for an inductively driven plasma current. Despite these attractive physics properties, the development of quasi-axisymmetric configurations has been severely constrained by the absence of an experimentally validated divertor concept compatible with their large bootstrap current. In this Letter, approximately quasi-axisymmetric fields, complemented with piecewise omnigenous perturbations, are proposed as the basis for a new strategy towards a stellarator reactor that potentially achieves, simultaneously, simple coil geometries, tokamak-like confinement and, through tailoring of the bootstrap current, compatibility with an island divertor. Implications for attaining a high bootstrap current fraction in tokamak devices are also discussed.

physics.plasm-ph↗
arXiv2026

Bayesian inference of non-Maxwellian distribution functions from collective Thomson scattering spectra

We investigate Bayesian inference of non-Maxwellian electron distribution functions from collective Thomson scattering (CTS) spectra. We represent distribution functions using multiple candidate models of different complexity and perform inference on synthetic spectra generated from known non-Maxwellian distribution functions. Our analysis demonstrates that a sufficiently flexible model can approximate the overall shape of the ground-truth distribution function. The most plausible model is identified based on model evidence, a statistical measure representing the probability to obtain the observed data given the model. When the candidates include the ground-truth model, the model evidence favors the ground-truth model. Without the ground-truth model as a candidate, the model evidence favors the candidate model with the fewest parameters that adequately approximates the data. The posterior probability density function of the most plausible model reveals the characteristic features and associated uncertainties of the underlying distribution function. The origin of the additional spectral peaks is attributed to a combination of modifications to the dispersion relation and reduced Landau damping. This enables the objective and data-driven identification of distribution functions directly from observed CTS spectra.

physics.plasm-ph↗
arXiv2026

Laser wakefield acceleration and x-ray emission in plasma produced by the electrical explosion of an aluminum wire

Underdense plasmas used in relativistic laser-plasma interactions are conventionally produced from gaseous targets, whereas low-density metallic plasmas remain comparatively unexplored. Here, we investigate the interaction of a femtosecond petawatt laser with expanded aluminum plasma using particle-in-cell simulations based on an experimentally motivated exploding-wire density profile. Three-dimensional simulations show that the laser propagates through the low-density metallic plasma, drives a pronounced wake-like structure, accelerates electrons to near-GeV energies, and produces directional broadband x-ray emission. Charge-state-resolved diagnostics further show that electrons associated with higher aluminum ionization stages are disproportionately represented in the energetic population. Complementary two-dimensional simulations indicate that the net electron energy gain is dominated by longitudinal electric-field work and show that relativistic electron generation persists under variations of the assumed initial ionization and density conditions, although the yield remains quantitatively sensitive to the plasma state. These results demonstrate the feasibility of electrically exploded aluminum plasma as a target platform for laser wakefield acceleration and associated x-ray generation.

physics.plasm-ph↗