Magnetic field visualization for superconducting circuits
Date
2016-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : Stellenbosch University
Abstract
ENGLISH ABSTRACT: Ambient magnetic fields, trapped flux and fields generated by bias and ground return currents affect superconducting electronic circuits negatively.
Analysis of current distribution in bias lines and in ground return paths gives us the ability to predict the behaviour of magnetic fields.
This work investigates the calculation of magnetic fields around superconducting integrated circuit structures from current density data, both for the interleaved uni-axial segment meshes of the FastHenry and FFH numerical
solvers, as well as the more general tetrahedral and triangular meshes of more versatile electromagnetic solvers. A tool called MagnetEx is proposed, which
gives the user a variety of visualization methods both for magnetic fields and current distribution. The result is a practical analysis tool with which the cause and effects of stray coupling or compromised shielding efficiency can be
identified quickly and visually in superconducting circuit layouts.
AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar
AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar
Description
Thesis (MEng)--Stellenbosch University, 2016.
Keywords
UCTD, Superconducting magnets, Electromagnets, Magnetic circuits, Magnetic fields -- Measurements