Sökning: "Rotational CARS"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden Rotational CARS.

1. 1. Development of Dual-broadband Rotational CARS for Combustion Diagnostics

   Författare :Joakim Bood; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; N2; O2; C2H2; Dimethyl Ether DME ; High pressure; Stray light filtering; multi-point CARS; CARS; Temperature; Engine knock; Physics; Fysik; Fysicumarkivet A:2000:Bood;

   Sammanfattning : The present thesis concerns development and application of dual-broadband rotational coherent anti-Stokes Raman spectroscopy (DB-RCARS) for temperature and species concentration measurements in combustion processes. Both fundamental development of the technique, including experimental as well as modelling results, and measurements in practical combustion devices were conducted. LÄS MER

3. 2. Development of dual-broadband rotational CARS for applied flame diagnostics

   Författare :Fredrik Vestin; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Combustion Physics; molecular spectroscopy; Laser Diagnostics; CARS; non-linear optics; rotational Raman scattering;

   Sammanfattning : The thesis work involved the further development of the dual-broadband rotational coherent anti-Stokes Raman spectroscopy (DB-RCARS) approach to applied flame diagnostics. This included the development of new experimental approaches, of new theoretical rotational CARS models, and of new evaluation routines as well as exploration of the potential of DB-RCARS to provide reliable thermometric measurements and measurements of concentration under a variety of conditions common in combustion research. LÄS MER

4. 3. On the Use of Rotational CARS on Polyatomics and in Time Domain

   Författare :Ali Hosseinnia; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rotational CARS; Laser Diagnostics; Ethylene; Ethane; Internal Rotation; Coherent Lifetime; ultrafast spectroscopy; Fysicumarkivet A:2020:Hosseinnia;

   Sammanfattning : This thesis work concerns the further developments of dual-broadband rotational coherent anti-Stokes Raman spectroscopy (RCARS) through experimental and theoretical investigations. Rotational CARS is an established technique for gas-phase thermometry and concentration measurement with major applications in combustion diagnostics. LÄS MER

5. 4. Rotational Coherent Anti-Stokes Raman Spectroscopy - Development and Applications

   Författare :Emil Nordström; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser diagnostics; Coherent anti-Stokes Raman Scattering; CARS; Spectroscopy; Combustion diagnostics; Fysicumarkivet A:2015:Nordström;

   Sammanfattning : During the last decades, coherent anti-Stokes Raman spectroscopy (CARS) has been an important tool in combustion research. The focus of this thesis is the improvement of the capability of the pure rotational CARS (RCARS) technique for this type of applications. LÄS MER

7. 5. Rotational Coherent Anti-Stokes Raman Spectroscopy: Experimental and Theoretical Developments in Gas-phase Thermometry

   Författare :Mikael Afzelius; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; collision line-broadening calculations; combustion laser diagnostics; Laserteknik; Laser technology; CARS; coherent laser spectroscopy; Fysicumarkivet A:2004:Afzelius;

   Sammanfattning : Dual-broadband pure rotational coherent anti-Stokes Raman spectroscopy was investigated in terms of thermometry and species concentration measurement for studies of combustion. The modelling of rotational CARS spectra under conditions of high pressure at room temperature was investigated. LÄS MER