NDLTD logo NDLTD Union Catalog and Global ETD Search

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.

Results

Showing 1 to 20 of 26 for “"laser absorption spectroscopy"”.

  1. Hydrogen purity assessment using laser absorption Spectroscopy

    Shilongo, Rosamunde P.University of Namibia2025

    … (𝐻2-Spectrometer) based on direct 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 …

    namibia Repository record

  2. Exhaled breath analysis using laser absorption spectroscopy

    McCurdy, Matthew R.Rice University2007

    … and therapeutic monitoring. For this thesis, laser spectroscopic techniques were employed to measure exhaled nitric oxide (NO), carbonyl sulfide (OCS) and carbon dioxide (CO2). A pulsed quantum cascade laser operating at 4.86 microns was coupled to a 36-m optical path length Herriott cell for …

    rice Repository record

  3. Miniaturized gas sensors based on laser absorption spectroscopy

    Tütüncü, ErhanUniversität Ulm

    ulm-diss Repository record

  4. Laser absorption spectroscopy for investigation of hypersonic propulsion

    Gessman, IsabellaUniversity of Illinois Urbana-Champaign2025

    … gas in the ACT-II facility, using 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 …

    uiuc Repository record

  5. Application of Supercontinuum Laser Absorption Spectroscopy to Combustion Environments

    Halloran, Michael; 0000-0002-3806-6350State University of New York at Buffalo2025

    Ph.D.

    buffalo Repository record

  6. Kinetics and dynamics measured using IntraCavity Laser Absorption Spectroscopy

    Witonsky, Scott Kenneth, 1975-Massachusetts Institute of Technology2002

    IntraCavity Laser Absorption Spectroscopy (ICLAS) is a high-resolution, high sensitivity spectroscopic method capable of measuring line positions, linewidths, lineshapes, and absolute line intensities with a sensitivity that far exceeds that of a traditional multiple pass absorption cell or Fourier …

    mit Repository record

  7. Determination of Flame Dynamics for Unsteady Combustion Systems using Tunable Diode Laser Absorption Spectroscopy

    Hendricks, Adam GeraldVirginia Tech2003

    … in chemical reaction rate. 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 …

    vt Repository record

  8. Statistical Inference of Heterogeneous Surface Catalycity Models Using Simulated Laser Absorption Spectroscopy in Reacting Flow

    Adowski, Timothy; 0000-0001-6215-0379State University of New York at Buffalo2019

    Ph.D.

    buffalo Repository record

  9. Determining Emission Factors from Marine Vessels Employing Differential Optical Absorption Spectroscopy (DOAS) and Tunable Diode Laser Absorption Spectroscopy (TDLAS)

    Khanbabakhani, Aida2019

    High SO2 concentrations are harmful to human health and impact climate by affecting cloud formation. Ship contrails are the major source of SO2 in the open-ocean and impact coastal region air quality. The International Maritime Organization (IMO) regulates SO2 emissions by requiring ships to use …

    york Repository record

  10. Time-resolved absorption spectroscopy of the rare gas dimer Rydberg states

    Shannon, David CharlesUniversity of Illinois at Urbana-Champaign2011

    … both through intra-cavity and multi-pass laser absorption spectroscopy.

    uiuc Repository record

  11. Laboratory measurements and modeling of trace atmospheric species

    Sheehy, Philip M. (Philip Michael)Massachusetts Institute of Technology2005

    … experiments were conducted using IntraCavity Laser Absorption Spectroscopy (ICLAS), a high-resolution, high sensitivity spectroscopic method that had been used primarily for static cell measurements in the Steinfeld Laboratory at MIT. Several modifications and improvements have been made to …

    mit Repository record

  12. An Optical Analysis of the Blowoff Behavior for Bluff Body-Stabilized Flames in Vitiated Flow

    Jensen, Trevor2011

    … to the turbulent combustion rig, 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 …

    uconn-diss Repository record

  13. Laserspektroskopische Bestimmung absoluter Konzentrationen von CN- und NH 2 -Radikalen in NO-dotierten Niederdruck-Wasserstoffflammen während der Verbrennung von Graphit

    Bohm, ThomasUniversität Heidelberg

    … und 25 mm) unter Verwendung von berührungsfreien laserspektroskopischen Methoden bestimmt. Die CN-Konzentrationen wurden mit Hilfe der cavity ring-down spectroscopy (CRDS) und die NH2-Konzentrationen mittels der intracavity laser absorption spectroscopy (ICLAS) gemessen. Die Temperaturen wurden …

    heid-diss Repository record

  14. Developing in situ instrumentation to monitor anthropogenic change

    Colson, Beckett C.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2023

    … the development process of CSPEC, a deep-sea laser spectrometer designed to measure the ocean carbon system through alternating measurements of the partial pressure of carbon dioxide (pCO2) and dissolved inorganic carbon (DIC). CSPEC uses tunable diode laser absorption spectroscopy (TDLAS) to …

    woods-hole Repository record

  15. Developing In Situ Instrumentation to Monitor Anthropogenic Change

    Colson, Beckett CasperMassachusetts Institute of Technology2023

    … the development process of CSPEC, a deep-sea laser spectrometer designed to measure the ocean carbon system through alternating measurements of the partial pressure of carbon dioxide (pCO₂) and dissolved inorganic carbon (DIC) . CSPEC uses tunable diode laser absorption spectroscopy (TDLAS) to …

    mit Repository record

  16. Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation

    Alekseev, VladimirTryckeriet i E-huset, Lunds universitet2015

    … further kinetic model development. Intracavity laser absorption spectroscopy was applied to record HCO concentration profiles in rich low-pressure CH4 mixtures and predictions of two widely used kinetic models were analyzed. Minor and major species concentrations in NH3 + air flames were used to …

    lund Repository record

  17. Laser Remote Sensing for Environmental Monitoring

    Guan, ZuguangDivision of Atomic Physics, Department of Physics, Faculty of Engineering, LTH, Lund University2010

    This thesis studies the techniques of laser remote sensing and their applications in environmental monitoring, as documented in several published papers. The environment where the human being live is degrading with an accelerating speed. Quantitative monitoring characterizes the quality of the …

    lund Repository record

  18. PHARMACEUTICAL INSTRUMENTATION DEVELOPMENT FOR IN-PROCESS MONITORING OF FREEZE-DRYING CYCLES

    Ogugua, LonginusDe Montfort University2021

    … temperature measurement (MTM) and 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 …

    de-montfort Repository record

  19. Plasma Dynamics in a High-Power Helicon Source

    Strachan, Campbell2024

    … have been implemented such 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 …

    aus-cath Repository record

  20. Plasma Dynamics in a High-Power Helicon Source

    Strachan, Campbell2024

    … have been implemented such 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 …

    anu Repository record

Page 1 of 2