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Showing 1 to 14 of 14 for “"TDLAS"”.
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Investigation of TDLAS for its Application as Primary Standard for Partial Pressure Measurements
… Diodenlaser-Absorptionsspektroskopie (TDLAS) als Primärmethode für Partialdruck-Messung. Um diese Untersuchung durchführen zu können, konstruierten wir ein 3-Kanal-Spektrometer, das eine Vakuumkammer mit beweglicher Herriott-Zelle umfasst. Weiterhin haben wir eine neue Steuerungs- und …
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Determining Emission Factors from Marine Vessels Employing Differential Optical Absorption Spectroscopy (DOAS) and Tunable Diode Laser Absorption Spectroscopy (TDLAS)
… of SO2 and CO2 using active-DOAS and TDLAS. A demonstration of the feasibility of the project was carried out by measuring sulfur dioxide (SO2) and carbon dioxide (CO2) in real ship plumes along with ship schedule information at a field site near the Welland Canal, Ontario.
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Laser absorption spectroscopy for investigation of hypersonic propulsion
… tunable diode laser absorption spectroscopy (TDLAS) to measure temperature and nitric oxide (NO) concentration. Another fundamental challenge associated with scramjet operation is achieving efficient fuel-air mixing and ignition within the short residence times of a scramjet combustor. Because …
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Laser Remote Sensing for Environmental Monitoring
… Tunable diode laser absorption spectroscopy (TDLAS) attracts research attention for its compactness, cost-effectiveness, and high sensitivity. The signal-to-noise ratio of a TDLAS can be conventionally improved by applying modulation; while in the thesis, a different idea is proposed and …
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Developing in situ instrumentation to monitor anthropogenic change
… tunable diode laser absorption spectroscopy (TDLAS) to measure the CO2 content of dissolved gas extracted via a membrane inlet. Chapter 2 derives membrane equilibration dynamics from first principles, thus enabling informed design decisions. The analytical results showed that cross-sensitivity …
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Developing In Situ Instrumentation to Monitor Anthropogenic Change
… tunable diode laser absorption spectroscopy (TDLAS) to measure the CO₂ content of dissolved gas extracted via a membrane inlet. Chapter 2 derives membrane equilibration dynamics from first principles, thus enabling informed design decisions. The analytical results showed that cross-sensitivity …
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An Optical Analysis of the Blowoff Behavior for Bluff Body-Stabilized Flames in Vitiated Flow
… a tunable diode laser absorption spectroscopy (TDLAS) system was developed. A TDL with a center wavelength in the near infrared region was simultaneously scanned across absorption lines of H<sub>2</sub>O and CO<sub>2</sub> to obtain temperature and species concentration data. A McKenna Flat …
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Near-infrared tunable diode laser absorption spectrometer for trace gas detection
… tunable diode laser absorption spectrometer (TDLAS), capable of measuring methane (CH₄) and nitrous oxide (N₂0) in their natural abundance's within the atmosphere, has been designed and constructed. The spectrometer has high resolution (0.0003 cm⁻¹), high precision (equivalent to a minimum …
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Determination of Flame Dynamics for Unsteady Combustion Systems using Tunable Diode Laser Absorption Spectroscopy
… Tunable Diode Laser Absorption Spectroscopy (TDLAS), centered over two water absorption features, allows a dynamic measurement of the product gas temperature. The response in product gas temperature directly relates to the enthalpy fluctuations that couple to the acoustics. Experimental …
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Hydrogen purity assessment using laser absorption Spectroscopy
… Tunable Diode Laser Absorption Spectroscopy (d-TDLAS). The goal is to establish a traceable and accurate methodology for hydrogen purity and concentration measurement without relying on calibration gases. The main objective of this research is to develop and evaluate the performance of the …
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Diodenlaser-gestützter In-situ-Nachweis von O 2 und Alkaliatomen zur Optimierung der Hochtemperaturkohlenstaub- und Sondermüllverbrennung sowie der Brandbekämpfung
… mit abstimmbaren Diodenlasern (TDLAS) diente dem kalibrationsfreien quantitativen Analyse gasförmiger Stoffe, deren Nachweis mit extraktiven Methoden nicht oder nur eingeschränkt möglich ist. Verschiedene Diodenlasertypen (Fabry-Pérot (FPDL), Distributed Feedback (DFB), External …
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PHARMACEUTICAL INSTRUMENTATION DEVELOPMENT FOR IN-PROCESS MONITORING OF FREEZE-DRYING CYCLES
… tuneable diode laser absorption spectroscopy (TDLAS) but only provides batch average temperatures whereas the glass transition/collapse temperature is determined using offline lab techniques employing sample conditions that do not mimic the true freeze drying process conditions. Aim: The aim of …
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Plasma Dynamics in a High-Power Helicon Source
… as Tuneable Diode Laser Absorption Spectroscopy (TDLAS) to determine atomic temperatures, Cavity Ring-Down Spectroscopy (CRDS) for direct negative ion density measurements, and an absolute intensity calibrated Optical Emission Spectroscopy (OES) method in conjunction with the YACORA Collisional …
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Plasma Dynamics in a High-Power Helicon Source
… as Tuneable Diode Laser Absorption Spectroscopy (TDLAS) to determine atomic temperatures, Cavity Ring-Down Spectroscopy (CRDS) for direct negative ion density measurements, and an absolute intensity calibrated Optical Emission Spectroscopy (OES) method in conjunction with the YACORA Collisional …