Modeliranje in razvoj integriranega okolja za sledenje po silnicah magnetnega polja v fuzijskem reaktorju

Bogdanović, Leon (author), Kos, Leon (mentor)

Za konstruiranje plazmi izpostavljenih komponent (PFC) fuzijskega eksperimentalnega reaktorja tipa tokamak je eden ključnih pristopov sledenje po silnicah v plazmi, kar omogoča definiranje toplotne obremenitve robne plazme (SOL) in posledično obliko prednjih površin komponent PFC. Za simulacijske kode sledenja po silnicah je značilno, da njihovi algoritmi iskanja presekov silnic niso predvideni za hitre simulacije v obsežni mreži trikotnikov PFC. V magistrski nalogi je razvita programska rešitev kot modul v okolju SALOME za hitro sledenje po silnicah v interpolirani mreži ravnovesnega magnetnega polja SOL in za iskanje presekov silnic z mrežo PFC, popisano z 10 milijonov in več trikotnikov v hierarhičnem prostoru (BVH). Kinematika visoko energijskih delcev, ki pod ostrim kotom zadevajo in s tem toplotno obremenjujejo PFC, temelji na integraciji sistema diferencialnih enačb, ki opisujejo gibanje delcev v osnosimetričnem magnetnem polju ravnovesne plazme. Iskanje presekov magnetnih silnic z mrežo trikotnikov PFC temelji na naprednih algoritmih s pospeševalnimi strukturami BVH jedra za sledenje žarkom Intel Embree. Razvita programska rešitev omogoča določitev osenčene mreže trikotnikov in izračun naložene moči na neosenčenem delu PFC. Primerjalni testi z obstoječimi rešitvami sledenja (PFCFLUX in SMARDDA) kažejo, da programska rešitev daje primerljive rezultate ob pohitritvi simulacij.

• Language: Slovenian
• Keywords: termonuklearna fuzija, fuzijski reaktor, tokamak, plazma, plazmi izpostavljene komponente, sledenje po silnicah magnetnega polja, SALOME, Intel Embree
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [L. Bogdanović]
• Year: 2021
• Number of pages: XXVI, 64 str.
• PID: 20.500.12556/RUL-127854
• UDC: 621.039.61:004.942(043.2)
• COBISS.SI-ID: 71265539
• Publication date in RUL: 25.06.2021

BOGDANOVIĆ, Leon, 2021, Modeliranje in razvoj integriranega okolja za sledenje po silnicah magnetnega polja v fuzijskem reaktorju [online]. Master’s thesis. Ljubljana : L. Bogdanović. [Accessed 11 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=127854

Secondary language

• Language: English
• Title: Modelling and development of an integrated framework for magnetic field-line tracing in a fusion reactor

Abstract

One of the main approaches for the design of plasma-facing components (PFC) of a tokamak type fusion experimental reactor is plasma magnetic field-line tracing. Such an approach can define the heat load of the Scrape-Off Layer (SOL) plasma and thus the shape of PFC surfaces. Standard codes for magnetic field-line tracing are not optimized for fast simulations in a huge triangle mesh. In this master thesis a software solution as a module in SALOME environment for fast magnetic field-line tracing in an interpolated SOL magnetic equilibrium and for checking intersections of field-lines with PFC meshes of 10 millions or more triangles in Boundary Volume Hierarchy (BVH) is developed. The kinematics of high energy particles, which hit PFC under sharp angles and consequently affect them thermally, is based on the integration of a system of ordinary differential equations which describe the motion of particles in an axisymmetric magnetic field of plasma equilibrium. Intersection checking of magnetic field-lines with PFC triangle meshes is based on state-of-the-art algorithms with acceleration structures (BVH) of the ray tracing kernel Intel Embree. The developed software solution can be used to determine the shadow triangle mesh and to calculate power deposition on the unshadowed part of PFC. Comparative tests with standard solutions for plasma magnetic field-line tracing (PFCFLUX and SMARDDA) show that the software solution gives comparable results with speed-up of simulations.

• Keywords: thermonuclear fusion, fusion reactor, tokamak, plasma, plasma-facing components, magnetic field-line tracing, SALOME, Intel Embree