A simulation framework for particle magnetization dynamics of large ensembles of single domain particles: Numerical treatment of Brown/N\'{e}el dynamics and parameter identification problems in magnetic particle imaging

Autor:	Albers, Hannes, Kluth, Tobias, Knopp, Tobias
Rok vydání:	2020
Předmět:	Electrical Engineering and Systems Science - Image and Video Processing Mathematics - Numerical Analysis 82D80 82D40 82C31 65M20
Druh dokumentu:	Working Paper
Popis:	Magnetic nanoparticles and their magnetization dynamics play an important role in many applications. We focus on magnetization dynamics in large ensembles of single domain nanoparticles being characterized by either Brownian or N\'{e}el rotation mechanisms. Simulations of the respective behavior are obtained by solving advection-diffusion equations on the sphere, for which a unified computational framework is developed and investigated. This builds the basis for solving two parameter identification problems, which are formulated in the context of the chosen application, magnetic particle imaging. The functionality of the computational framework is illustrated by numerical results in the parameter identification problems either compared quantitatively or qualitatively to measured data. Comment: 25 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2010.07772 Zobrazit plný text záznamu View this record from Arxiv