Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 193 for “"Optical emission"”.
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Stimulated optical emission in ruby
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1961.
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Surface layer evolution in glow discharge optical emission spectroscopy.
Glow discharge optical emission spectroscopy (GDOES) is a modem analytical technique for the analysis of the chemical composition of bulk materials and the depth profiling of multi-layer structures. Most research in the use of GDOES has concentrated on developing accurate methodologies for …
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Identification of chemical species using artificial intelligence to interpret optical emission spectra
… the predictive capabilities of ANN’s is that of optical emission spectra (OES). OES is an important diagnostic for monitoring plasma species within plasma processing. Normally, OES spectral interpretation requires significant prior expertise from a spectroscopist. One way of alleviating this …
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Optical emission spectroscopy of laser induced plasmas containing carbon and transitional metals
The spectroscopic, SEM and Raman measurements on carbon nanotubes under the exact conditions of which OES analysis were made showed that at a pressure of 400 Torr and a flow rate of 200 sccm, the quality and quantity of single-walled carbon nanotubes was the highest.
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Optical Emission and Kinetics of High-Pressure Radiation-Produced Noble Gas Plasmas
Made available in DSpace on 2014-12-14T06:25:57Z (GMT). No. of bitstreams: 1 7606987.pdf: 36180939 bytes, checksum: 6ff91f4b7bccbf4426ef56ca8deb13d7 (MD5) Previous issue date: 1975
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CO2 monitoring by optical emission spectroscopy and mass spectrometry for CO2 plasmas
… In this work quadrupole mass spectrometry and optical emission spectroscopy methods are compared. The QMS method was implemented by an SRS Universal Gas Analyzer and the OES method through a Gencoa OPTIX remote spectrometer. These are attached to the Carbon Dioxide Optical Measurement Apparatus …
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Measurement of Electron Density and Temperature in Silicon Microplasma Devices by Optical Emission Spectroscopy
Made available in DSpace on 2017-07-06T18:55:09Z (GMT). No. of bitstreams: 3 Li_Benben_MS.pdf: 998567 bytes, checksum: 7f27365b2d81cd9fa40c84426158d789 (MD5) Li_Benben_MS_ABS.pdf: 11136 bytes, checksum: 1c9a21b27d87b6b38a303fecf27b5f2e (MD5) license.txt: 4813 bytes, checksum: …
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Optical Emission Spectroscopy during Sputter Deposition of CdTe Solar Cells and CuTe-Based Back Contacts
… processes are studied in detail through optical emission spectroscopy. In order to extract plasma parameters, experimental data and simulations were matched together. We could extract excitation temperatures, vibrational temperatures and rotational temperatures of the plasmas. To explain …
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Nonlinear optical emission and near-field enhancement effects in arrays of gold bowtie nano-antennas
… we focus on laser-induced damage, nonlinear optical emission, and a proof-of-concept for utilizing arrays of gold BNAs to enhance the forces in an optical trapping system. From FDTD simulations, the optical response of a single BNA is demonstrated to increase the local intensity by a factor …
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Thermal and Optical Emission and Thermal Capture of Electrons and Holes at Gold Centers in Silicon
Made available in DSpace on 2014-12-08T22:24:49Z (GMT). No. of bitstreams: 1 7020964.pdf: 2568969 bytes, checksum: a53b2d66706075456ca0f8a56419a1a3 (MD5) Previous issue date: 1970
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Development of 0 – D argon collisional radiative model conjoined with optical emission spectroscopy for radio frequency plasma
… (RFEA), laser-induced fluorescence (LIF), or optical emission spectroscopy (OES) are often employed for measuring plasma parameters, which can be resource-intensive and time-consuming. Recently, a computational plasma diagnostic technique, collisional radiative model (CRM), has been gaining …
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Investigation of Matrix Effects in the Analytical Performance of Solution Cathode Glow Discharge Coupled to Optical Emission Spectroscopy
Tesis doctoral por compendio de publicaciones
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Plasma optical emission spectroscopy of laser cladding for process control and oxidation behavior of laser clad NbAl alloys
Spectroscopic diagnostics based on the plasma optical emission spectroscopy has been employed in this investigation to infer composition, thickness, and temperature of the clad during laser cladding of Nb-Al-Hf alloys on Nb substrate. Isothermal oxidation behavior of the laser clad NbAl$\sb3$ based …
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Designing experiments to develop measurements for species catalytic recombination using actinometry and optical emission spectroscopy on silicon carbide
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
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A Novel Method for Confirming the Presence of Volatile Reduced Sulfide Compounds via Inductively Coupled Plasma-Optical Emission Spectroscopy
… the ICP-AES, inductively coupled plasma-atomic emission spectroscopy, which could qualitatively identify the presence of sulfide compounds in drywall. The drywall samples were set up in a natural environment, and the presence of sulfide compounds were tested for with copper coupons. The oxidized …
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Designing and Building a Novel Magnetic Heating System to Investigate the Dependence of the Magnetic System and the Optical Emission from Nanoparticles
… fields and the effect this would have on their optical properties, therefore, considerable work is still required in order to understand the detailed interactions. Several modelling and simulations of the MHC were conducted besides developing the MHC that was designed and built for small samples …
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Synthesis and Properties of GaAs1-xBix Prepared by Molecular Beam Epitaxy
… Bi concentration in the alloy and enhancing its optical emission efficiency.</p><p>In chapter 3, the discovery of a trade-off between the structural and optical characteristics of GaAs1-xBix , controlled by the degree to which the growth is kinetically-limited, is described. Chapter 4 discusses …
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N2, O2, and NF3 Dissociation in a Low Frequency, High Density Plasma Source
… and gas dissociation fractions were measured by optical emission spectroscopy (OES), combined with Ar actinometry for various mixes of N2, O2, and NF3 feed gases with Ar at 400 sccm total flow rate in a low frequency (400 kHz), high pressure (4.0 Torr), inductively-coupled toroidal remote plasma …
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