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Accurate breakdown voltage predictions in the microscale regime are even more important with the trend of decreasing electronic device dimensions. Developing analytic models to accurately predict breakdown at microscale is vital for understanding the underlying physics occurring within the system and to ensure the prevention or production of a discharge, depending on the application.
We first take a pre-existing breakdown model coupling field emission and Townsend breakdown and present a matched asymptotic analysis resulting in analytic Loveless thesis for breakdown voltage in argon at atmospheric pressure.
Next, we extend the model for argon at atmospheric pressure to generalize for gas and further explore the independent contributions of field emission and Townsend discharge. Finally, we present analytic expressions for breakdown voltage valid for any gas at any pressure, and discuss the modified Paschen minimum occurring at microscale.
The presented models show excellent agreement with numerical and simulation results, and agree well with experimental data when using the field enhancement factor as a fitting parameter. The work presented in this thesis is a first step in unifying gas breakdown across length scales and breakdown mechanisms.
Future work will aim to incorporate other breakdown mechanisms, such as quantum effects or space-charge limited flow, to provide a more complete unified model for gas breakdown. Loveless received this award for theoretical modeling of electrical breakdown in gases in microscale gaps.
She performed a matched asymptotic analysis of a model unifying field emission with Townsend avalanche that matched simulation and experimental results across a wide range of gap distances and pressures while quantitatively and analytically demonstrating the transition from field emission to the classical Paschen law.
Her work demonstrates the fundamental physics in small scale devices that will aid researchers interested in either generating microplasmas or avoiding breakdown in micro- and nanoelectronics.
She has also received the Otto F.May 31, · Unlike many academic disciplines, the sociology of education is a relatively new field of initiativeblog.com Thesis – UC Santa Cruz – Sociology 22 May A senior thesis is a large, independent research project that students submit their thesis proposal to the Sociology Undergraduate Education Educational Inequality in an Affluent Setting.
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Thomas Daniel Loveless Thesis Submitted to the Faculty of the Graduate School of Vanderbilt University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE in Electrical Engineering May, Nashville, Tennessee Approved by: Dr.
Lloyd Massengill. This thesis is dedicated to the memory of my sister, Leslie Ann Loveless, whose footsteps I followed on my early adventures into the canyons and forests of our childhoods, and who fought with all her heart and soul to stay with us.