Download or read book Coherent Anti Stokes Raman Spectroscopy CARS Project Report for EMR written by and published by . This book was released on 1992 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A specialized software package for generating the theoretical spectra and for analyzing the experimental spectra collected from Coherent Anti-Stokes Raman Spectroscopy (CARS) was developed for a DEC VAX-11 computer using the Fortran language. In 1991, the VAX versions of the software were transported to a personal computer (PC) environment and a number of modifications had to be made. This report describes the various tasks performed to upgrade the PC versions of CARS software to detect the presence of nitric oxide in flames and to address several other concerns associated with the CARS spectral analysis.
Download or read book Coherent Anti Stokes Raman Spectroscopy CARS Software Development written by and published by . This book was released on 1991 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent anti-Stokes Raman spectroscopy (CARS) is an optical technique valuable for combustion diagnostics. This report describes the recent additions and improvements made to the CARS analysis software package, including rotational CARS, the theoretical CARS spectra of the nitrogen oxide molecule, the updating of molecular data, modifications to the program SPT.FIT, the program SPT.TRANS.THEORY, and porting of the program SPT.GENERATE.
Download or read book Coherent Anti Stokes Raman Spectroscopy CARS written by and published by . This book was released on 1993 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent Anti-Stokes Raman Spectroscopy (CARS) has been accepted as a very useful tool in combustion diagnostics. CARS is an optical technique in which two powerful laser beams are brought to a focus over a very small region in a medium usually a flame. This produces an output laser-like beam arising from a specific interaction of the laser radiation with the molecules of the gases in the flame and the spectral characteristics of this beam contains information about the temperature and species present in the focal volume. The relevant information from the CARS spectra can be extracted only by comparing it with theoretically calculated spectra. A complex software package was developed for generating the theoretical CARS spectra and for analyzing the experimental spectra. This report describes the tasks undertaken to enhance the capabilities of the existing CARS software package with the aim of detecting species such as NO and O2.
Download or read book Coherent Raman Spectroscopy Applications And New Developments Proceedings Of The Xi European Cars Workshop written by F Castellucci and published by World Scientific. This book was released on 1993-02-09 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: The meeting was a forum on the 'state of the art' of the fundamental aspects and the applications of Coherent Antistokes Raman Scattering (CARS) and related nonlinear optic techniques.This volume contains the works of outstanding scientists from the most distinguished research centers of universities, public and private institutions in Europe and other countries, who work on the theory and application of nonlinear laser spectroscopic techniques to the study of gas combustion kinetics, noninterfering flame temperature measurements, high temperature reactors, plasmas and the exciton and vibrational dynamics in condensed phases.
Download or read book The application of coherent anti stokes Raman spectroscopy CARS to chemical reactors written by W. A. England and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Conceptual Design Study for Coherent Anti Stokes Raman Spectroscopy CARS Diagnostics in the AMMRC Ballistic Compressor Facility written by John A. Shirley and published by . This book was released on 1980 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: A conceptual design of a diagnostic system using coherent anti-Stokes Raman Spectroscopy (CARS) to determine time resolved temperature and species concentrations in the Army Mechanics and Materials Research Center ballistic compressor has been formulated. Performance calculations have been carried out for hydrogen which is an ideal diagnostic species for this application. Results are also presented of computer code calculations of collision narrowed spectra of nitrogen. Several pump laser systems were compared, and a high repetition frequency Nd:YAG laser was determined to be superior. Population saturation, stimulated Raman gain, and optical breakdown are not expected to pose severe limitations on laser intensity or measurement signal-to-noise ratios. Consideration is given to problems pertinent to operation of the ballistic compressor including compressor recoil, window deflections and generation of CARS from the test section windows. Finally, the possibility of using pulsed stimulated Raman gain spectroscopy (SRGS) as an alternative to CARS at the high densities typical of the ballistic compressor has been identified. SRGS appears to offer adequate measurement ability and possesses certain advantages over CARS. (Author).
Download or read book The Calculation of Theoretical Coherent Anti stokes Raman Spectra written by and published by . This book was released on 1988 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brief summary of the theoretical principles underlying coherent anti-stokes Raman spectroscopy (CARS). The report discusses and describes the role of collisional narrowing due to overlap of Raman lines; appropriate convolution with the pump laser profile; the implementation of a computer code to calculate broadband nitrogen CARS spectra; and the effect of the various assumptions and models on the resultant CARS spectrum. The theoretical CARS spectra are compared with those calculated from a code developed at the Sandia National Laboratories, Livermore, California, and computer programs to fit experimental CARS spectra using a precalculated library are described and examples are presented.
Download or read book The Application of Coherent Anti Stokes Raman Spectroscopy CARS to the Study of Heterogeneous Deactivation of Vibrationally excited Nitrogen written by Kimberly Ann Rimkus and published by . This book was released on 1993 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coherent Anti stokes Raman Spectroscopy written by Stanford University. Ginzton Laboratory and published by . This book was released on 1977 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first high resolution cw CARS measurements of H2, D2 and CH4 have been carried out. The preliminary experimental results have verified the predicted CARS signal strengths and CARS lineshapes. The measurements have shown that ultra-high resolution Raman spectroscopy by the cw CARS method is a very useful spectroscopic tool.
Download or read book Automation of Coherent Anti Stokes Raman Spectroscopy CARS Probe Delay Scan Measurements written by and published by . This book was released on 2015 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis for Coherent Anti Stokes Raman Spectroscopy CARS written by Herschel Weil and published by . This book was released on 1980 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coupled differential equations have been formulated which model the generation of coherent anti-Stokes Raman radiation in molecular gases. The equations include not only the basic term which involves the coherent interaction of incident pump and idler (Stokes) waves to generate the anti-Stokes radiation, but also include additional terms which model other radiation and absorption processes, both stimulated and coherent, which occur simultaneously. These are important in determining saturation effects due to population depletion of the lowest energy level. Other effects have also been considered. These are a finite idler beam bandwidth (simultaneous excitation of more than one vibration frequency) a quasi-monochromatic idler beam slightly off the true Stokes frequency; laser pulse shape; modification of the result for different rotational levels. A number of different computer codes have been developed to solve the equations at different levels of complexity. With them numerical investigation of the effects of various physical factors on saturation was carried out. Some of the results are presented graphically. (Author).
Download or read book Real Time CARS Coherent Anti stokes Raman Spectroscopy Spectroscopy in a Semi industrial Furnace written by A. Ferrario and published by . This book was released on 1983 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Technical Note written by and published by . This book was released on 1978 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cars coherent Anti Stokes Raman Spectroscopy Investigations in Sooting and Turbulent Flames written by Alan C.. Eckbreth and published by . This book was released on 1979 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent anti-Stoke Raman spectroscopy (CARS) investigations in sooting, laminar and turbulent, propane-fueled diffusion flames are reported. For a 5320 A pump wavelength, using a frequency-doubled neodymium laser, interferences can occur at very high soot densities. For N2 CARS, there are both incoherent and coherent components to the interference. The incoherent interference arises primarily from anti-Stokes fluorescence from C2 excited by Stokes laser absorption. The C2 is created by the laser vaporization of soot particulates, shown to occur even on a nanosecond time scale. The coherent interference arises most probably from electronically-resonantly enhanced wave mixing in the C2. Fortunately, neither interference is very large. By proper experimental design, interference-free CARS spectra from flame N2 can be obtained even at high soot densities. CARS signatures from N2 have been employed to map the temperature field with high spatial precision throughout a small, luminous, highly sooting, laminar propane diffusion flame. Single pulse (approx, 10 nanosecond) CARS thermometry has been demonstrated in various regions of a highly swireld, turbuelnt propane diffusion flame. Based upon these investigations, CARS continues to appear very promising for diagnostic applications to practical combustion sources. (Author).
Download or read book Microlog Canadian Research Index written by and published by . This book was released on 1992 with total page 1322 pages. Available in PDF, EPUB and Kindle. Book excerpt: An indexing, abstracting and document delivery service that covers current Canadian report literature of reference value from government and institutional sources.
