Modelling of a large-scale non-insulated non-planar HTS stellarator coil using Quanscient Allsolve

TL;DR

This paper presents a large-scale, non-insulated HTS stellarator coil model using Quanscient Allsolve, demonstrating efficient transient simulations that aid in understanding complex magnet behavior and quench phenomena.

Contribution

It introduces a detailed finite element model of a real-size non-insulated HTS stellarator coil utilizing Quanscient Allsolve's DDM for faster computation.

Findings

Transient simulations are significantly accelerated by DDM.

Model effectively predicts complex coil behaviors including energy imbalance.

Simulation results support coil design optimization for fusion applications.

Abstract

Stellarators present features such as steady-state operation and intrinsic stability that make them more attractive than tokamaks in their scaling to fusion power plants. By leveraging more possible configurations, stellarators can be optimized for better engineering feasibility, e.g., resilience to manufacturing tolerances, reduced mechanical load on conductor, material optimization, cost of fabrication. Finite Element Analyses are crucial for the design and optimization of High-Temperature Superconducting (HTS) REBCO non-planar coils. However, accurate simulation of large-scale magnetostatic, mechanical, and quench models can take days or even weeks to compute. In this work, we present a model of a real-size, HTS, non-insulated, non-planar stellarator coil and perform in Quanscient Allsolve, a transient simulation study including modelling quench, using the $H-\varphi$ formulation. It is shown that transient model benefits heavily from the built-in Domain Decomposition Method (DDM), which allows reaching reasonable computation times. Such models become then invaluable in predicting and understanding the complex behavior of non-insulated large-scale REBCO magnets, including their intrinsic energy imbalance.