Mapping temperature fields in 3D with x-ray diffraction and magnetic resonance imaging

Chalise, Darshan

Permalink

https://hdl.handle.net/2142/120377 Copy

Description

Title

Mapping temperature fields in 3D with x-ray diffraction and magnetic resonance imaging

Author(s)

Chalise, Darshan

Issue Date

2023-04-19

Director of Research (if dissertation) or Advisor (if thesis)

Cahill, David G

Doctoral Committee Chair(s)

Abbamote, Peter

Committee Member(s)

• Leal, Cecilia
• Sutton, Bradley P

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• Thermometry
• 3d Imaging
• Mri
• X-ray Diffraction

Language

eng

Abstract

While there exist surface-based thermometry techniques that provide spatial resolution in nanoscale and temperature resolution in tens of millikelvins, there is a general lack of thermometry techniques that provide a full field 3-dimensional (3D) temperature information with excellent spatial, temporal and temperature resolution. 3D thermometry is, however, required in several biological and engineering systems. In this thesis, I present techniques to image temperature fields in two important engineering systems - 3D integrated circuits (3D ICs) and electrochemical energy storage devices – and in fluids which are of importance in both engineering and biology. In 3D ICs, I demonstrate how x-ray diffraction intensities can be used to simultaneously map temperature in different device layers. In electrochemical energy storage devices, namely proton exchange membrane (PEM) fuel cells and solid-state Li ion batteries, I discuss how magnetic resonance imaging (MRI) can be used for thermometry of the electrolyte layer and demonstrate the mapping of temperature and hydration in PEMs. In fluids, I demonstrate how the sensitivity of MR thermometry can be enhanced with the immersion of nanoparticles. For all these systems, I discuss the spatial, temporal and temperature resolution achieved with the demonstrated techniques and the potential ways to improve them. Finally, I discuss the applicability of electron paramagnetic resonance (EPR) imaging of n-type semiconductors for possible 3D thermometry in engineering and biology. In all the techniques presented, I also discuss the practicality and requirements for application of the technique in real world systems.

Graduation Semester

2023-05

Type of Resource

Thesis

Handle URL

https://hdl.handle.net/2142/120377

Copyright and License Information

Copyright 2023 Darshan Chalise

Owning Collections