Browsing by Author "Yalin, Azer"
Now showing items 1-20 of 21
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Towards understanding the processes that govern variability in the Southern Hemisphere
The climate at extratropical latitudes is strongly a result of the behavior of the zonal mean zonal wind and its inherent variability. This variability is dominated largely by the north-south fluctuation of the midlatitude ... -
Investigating plasma modifications and gas-surface reactions of TiO2-based materials for photoconversion
Plasmas offer added flexibility for chemists in creating materials with ideal properties. Normally unreactive precursors can be used to etch, deposit and modify surfaces. Plasma treatments of porous and compact TiO2 ... -
Investigation of dual-pulse laser plasmas for ignition of fuel-air mixtures
Progress towards more complex combustion applications has demanded more advanced and versatile ignition techniques. One attempt to address some of the concerns associated with well-established techniques such as spark plugs ... -
Effect of additives on laser ignition and compression ignition of methane and hydrocarbons in a rapid compression machine
Despite recent efforts to develop new energy systems that do not rely on combustion of fossil fuels, internal combustion (IC) engines powered on fossil fuels (i.e. gasoline, diesel or natural gas) will remain as an integral ... -
Probing folding/unfolding kinetics, reaction mechanism and thermodynamic stability of nucleic acid hairpins
Nucleic acid hairpins play pivotal roles in biological and cellular processes. The functions of the DNA and RNA hairpins depend upon the conformational changes they adopt during the biological process. Therefore, a clear ... -
Dynamics of low-density ultracold plasmas in externally applied electric and magnetic fields
The experiments described in this thesis were focused on the influence of external electric and magnetic fields and electron evaporation on the evolution of ultracold plasmas (UCPs). The UCPs were created from the ... -
Low-cost monitor for simultaneous measurement of fine particulate matter and aerosol optical depth, A
Exposure to airborne particulate matter with diameters less than 2.5 µm (PM2.5) is a leading cause of death and disease globally. In addition to affecting health, PM2.5 affects climate and atmospheric visibility. NASA ... -
Total and differential sputter yields of boron nitride
A quartz crystal microbalance (QCM) based system was used to measure total and differential sputter yields of Boron Nitride targets due to Xenon ion bombardment. The system used a four-grid ion source to generate a (nearly) ... -
Demonstration of a compact 100 Hz, 0.1 J, diode-pumped picosecond laser
In this work I present an all laser diode pumped chirped pulse amplification laser system that is capable of producing 100 mJ laser pulses at 100 Hz repetition rate with durations of under 5 ps. The primary focus of this ... -
Scatter loss and surface roughness of hafnium oxide thin films
The work presented in the thesis aims to characterize and improve the surface quality and scatter loss of HfO2 single layer thin films. Dual ion beam sputtered coatings of HfO2 produced at CSU have been shown to have a ... -
Nanometer-scale machining with extreme ultraviolet lasers
This thesis demonstrates the feasibility of direct machining in the nanometer scale using Extreme Ultraviolet (EUV) laser radiation. Laser machining of materials has been widely used for the development of micromechanical ... -
Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner
The addition of plasma to a combustion system has the potential to increase the combustion efficiency and reduce harmful emissions by reforming hydrocarbon fuels. The ability for plasma to reform fuel to create hydrogen-rich ... -
Non-invasive Hall current distribution measurement system for Hall Effect thrusters, A
A direct, accurate method to measure thrust produced by a Hall Effect thruster on orbit does not currently exist. The ability to calculate produced thrust will enable timely and precise maneuvering of spacecraft—a capability ... -
Study of the influence of process parameter variations on the material properties and laser damage performance of ion beam sputtered Sc2O3 and HfO2 thin films, A
This work is a study of the influence of process parameter variations on the material properties and laser damage performance of ion beam sputtered Sc2O3 and HfO2 thin films using a Vecco Spector ion deposition system. ... -
NOx formation in methyl ester, alcohol, and alkane droplet autoignition and combustion: PLIF measurements and detailed kinetic modeling
Numerous studies have shown that diesel engines fueled by fatty-acid methyl ester biodiesel often exhibit slightly increased production of oxides of nitrogen (NOx) in comparison to petroleum diesel. A number of explanations ... -
Calcium aluminate electride hollow cathode, A
The development and testing of a hollow cathode utilizing C12A7 (12CaO.Al2O3) electride as an insert are presented. Hollow cathodes are an integral part of electric propulsion thrusters on satellites and ground-based plasma ... -
Buck converter for on-chip reference generation
Most modern day chips use an on chip voltage reference, also known as a bandgap voltage reference generator, to provide a stable reference, independent of power supply voltage (VDD) ripples and compensated for temperature ... -
Characterization of laser-produced plasmas as light sources for extreme ultraviolet lithography and beyond
Lithography is a critical process in the fabrication of integrated circuits. The continuous increase in computing power for more than half a century has depended in the ability to print smaller and smaller features, which ... -
Development and testing of a solid core fiber optic delivery system and ultraviolet preionization for laser ignition
Laser ignition of natural gas engines has shown potential to improve many facets of engine performance including brake thermal efficiency, exhaust emissions, and durability as compared with traditional spark ignition. Laser ... -
Development and testing of a multiplexing system for laser ignition of large bore natural gas engines
Conventional electric spark plugs present a hindrance to the continuing goals of higher efficiency and reduced emissions for large-bore natural gas engines. In order to achieve these goals, higher compression ratios and ...
