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Pressure-dependent N2 Q-branch fs-CARS measurements
Published online in Wiley InterScience (www.interscience.wiley.com). DOI: 10.1002/jrs.949. Pressure-dependent N2 Q-branch fs-CARS measurements.
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Interference-free gas-phase thermometry at elevated pressure using
Abstract: Rotational-level-dependent dephasing rates and nonresonant ... G. Knopp, P. Beaud, P. Radi, M. Tulej, B. Bougie, D. Cannavo, and T. Gerber, “ Pressure-dependent N2 Q- branch fs-CARS measurements,” J. Raman Spectrosc. ... N2 and O2 self-broadened linewidths using hybrid femtosecond⁄ picosecond coherent ...
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Single-shot gas-phase thermometry using purerotational hybrid
theoretical model is introduced to account for rotational-level dependent .... G. Knopp, P. Beaud, P. Radi, M. Tulej, B. Bougie, D. Cannavo, and T. Gerber, “ Pressure-dependent N2 Q- branch fs-CARS measurements,” J. Raman Spectrosc. ... femtosecond coherent anti-Stokes Raman scattering spectroscopy of N2,” Appl. Phys ...
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Time-domain measurements of S-branch N2–N2 Raman linewidths
May 25, 2012 ... Time-domain measurements of S-branch N2–N2 Raman linewidths using ... the J -dependent CARS signal decay as a function of probe delay.
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Communication: Time-domain measurement of high-pressure N2
Nov 28, 2011 ... ... dynamics of the molecu- lar response.1 In fs CARS, the temporally short and spec- ... approximations from Q-branch data which can lead to errors ... rotational- level and species-dependent collisional dephasing rates can ...
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Two-dimensional temperature determination in the - OSA Publishing
titative temperature measurements, however, the ef- fective scattering cross ... an atmospheric-pressure laminar flat-flame burner. McKenna ... Raman–anti-Stokes Q branch of N2 anti-Stokes fil- ter. ... tion due to the fourth-power dependence on laser .... N2 anti-. StokesStokes intensity ratio fA*fS* assuming excitation at 532.
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Species concentration measurements using CARS - OSA Publishing
centration measurements with CARS, including laser-induced Stark effects, .... and 0.96 and at a temperature of 297 K. A pressure of .... the N2 Q-branch lies outside the desired range, as is the ... Q-branch. The temperature and J dependence of CO Raman linewidths ...... F. S. Moya, "Flame Investigation by CARS," Prog.
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Femtosecond time resolved CARS spectroscopy of H2-N2 mixtures
Jan 15, 2010 ... CARS signal in H2-N2 mixtures at low densities. ... speed dependence of the collisional parameters. ... In the CARS experiment, the Q-branch ... as the Stokes beam (100 fs pulse duration, 10 nm bandwidth) and the second part is used, ... measurement of the pressure and temperature of the studied gas ...
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Application of CARS to an Operating Chemical - OSA Publishing
er available from the N2 laser which pumped the broad- band dye laser. ... nique. The applicability of CARS to concentration measurements in chemical ... time dependence/variability of a process may be stud- ied. ... High-pressure argon has a flat. CARS .... 30. Fro. 4. Linewidths in the CO Q-branch at room temperature.
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Applications of Ultrafast Lasers for Optical Measurements in
Mar 18, 2008 ... imaging, ultrafast CARS spectroscopy, and resonant and Raman PS ..... Pressure dependence of ..... N2 Q-branch fs-CARS measurements.
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High-resolution continuous-wave coherent anti-Stokes Raman
Sep 2, 1982 ... The advantages of CARS measurements in the jet over ... Recently, CARS at low spectral resolution was demonstrated in a N2 ... 68-kg/cm (150-psi) input pressure and 30-250-Torr backing ... Supersonic jet and several spectra of the Pi Q branch ... the time dependence of the molecular positions across.
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Spectroscopic Measurement Techniques for Aerospace Flows
Research Scientist, Advanced Sensing and Optical Measurement Branch, MS ... conventional techniques (e.g. pressure probes) are still valued in these types of flows. .... spectroscopy (CARS), provide high signal-to-noise ratio data in applications ..... P,T) dependencies and velocity dependence (arising from the Doppler ...
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Coherent Ro-vibrational Revivals in a Thermal Molecular Ensemble
Feb 21, 2012 ... J (Q branch) is equal to CQ, and for all J = J ± 2 .... to measure vibrational coherence in nitrogen molecules, ... Spectra-Physics) produces 2 mJ 130 fs pulses at 800 .... rephasing of CARS signal in N2 at room temperature and pressure of p = 158 ± .... via the coordinate-dependent molecular polarizability. In .
[ 1202.4046 - Read/Download File

Rovibrational Wave-Packet Dispersion during - Temple University
Aug 14, 2009 ... The wave packets reveal a 1=e dispersion time of 3.9 ps for N2 and 2.8 ... Pulse self-compression of temporal features to 8 fs within the .... intensity dependent index of refraction for the material. ... Restricting ourselves to the Q branch, the impulsive ... with previous CARS measurements at room temperature.
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Curriculum Vitae - College of Engineering - Texas A&M University
Jun 17, 2016 ... femtosecond coherent anti-Stokes Raman scattering (fs-CARS) spectroscopy of O2,” ... of rotationally resolved H2 Q-branch Raman coherence lifetimes ..... P. J. Wrzesinski, W. D. Kulatilaka, S. Roy, and J. R. Gord, “Pressure-Dependence of High- .... Measurements in CO/N2 and Ar/N2 Gas Mixtures using ...
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Lineshape analysis of stimulated Raman spectra of the near-nozzle
Apr 20, 2009 ... of the Q branch of the fundamental vibration mode of N2 have been recorded from two different nitrogen ... [11], or nonlinear Raman spectroscopies (SRS, CARS,...) [12, 13] .... Deff from measurements of the gas flow to the expansion chamber [24]. ... is a temperature-dependent model of the pressure broad-.
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Development and Application of Pure Rotational CARS for Reactive
Jan 1, 2012 ... temperature-dependent, it plays a very critical role in RCARS thermometry. It .... Direct measurement of S-branch N2-H2 Raman linewidths using time- resolved pure ... Pure rotational CARS measurements of temperature and O2- ... calculations and in the other case derived by the processing of Q-branch.
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Proceedings of ECONOS 2016 Gothenburg, Sweden
Apr 25, 2016 ... Raman linewidth measurements using time-resolved hybrid ... Michael Scherman — New laser architecture for hybrid fs-ps/CARS ... of hydrocarbon intermediate species in a rich low-pressure ... N2 thermometry in hybrid fs/ps CARS ..... low enough to allow for the observation of fully resolved Q branches of.
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Femtosecond time resolved CARS spectroscopy of H2-N2 mixtures
Jan 15, 2010 ... CARS signal in H2-N2 mixtures at low densities. ... speed dependence of the collisional parameters. ... In the CARS experiment, the Q-branch ... as the Stokes beam (100 fs pulse duration, 10 nm bandwidth) and the second part is used, ... measurement of the pressure and temperature of the studied gas ...
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Ground-based water vapor raman lidar measurements up to the
routine measurements of water vapor between 4 km and 15–. 20 km with a ... the Stokes Q branch occurring in the OH-stretching band near the frequency shift of ...
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