Atmospheric Absorption Of Carbon Dioxide Laser Radiation Near Ten Microns PDF Download
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| Author | : John Harold McCoy |
| Publisher | : |
| Total Pages | : 270 |
| Release | : 1968 |
| Genre | : Carbon dioxide |
| ISBN | : |
Download Atmospheric Absorption of Carbon Dioxide Laser Radiation Near Ten Microns Book in PDF, ePub and Kindle
A carbon dioxide laser source and a long path multipass absorption cell have been used to measure the water vapor and carbon dioxide transmittance at three wavelengths in the 8 to 12 micron atmospheric window. The carbon dioxide data were analyzed by theoretical equations to determine the line strengths and Lorentz half width. An empirical equation was derived relating the water vapor transmittance to the amount of water vapor in the path. (Author).
| Author | : Edward H. Newman |
| Publisher | : |
| Total Pages | : 124 |
| Release | : 1970 |
| Genre | : Lasers |
| ISBN | : |
Download Absorption of Five to Six Micron Carbon Monoxide Laser Radiation by Water Vapor Book in PDF, ePub and Kindle
| Author | : Gary Lee Trusty |
| Publisher | : |
| Total Pages | : 154 |
| Release | : 1972 |
| Genre | : Heat |
| ISBN | : |
Download Absorption Measurements of the 10.4 Micron Region Using a CO2 Laser and a Spectrophone Book in PDF, ePub and Kindle
A spectrophone cell and a data acquisition system were developed and used to make low level absorption measurements of carbon dioxide and water vapor. A 1 watt per line carbon dioxide laser was used as the source. Measurements were made of the absorption of the P branch of the 10.4 micron band of CO2. Results of these measurements were used to calculate the self broadened and foreign broadened Lorentz half widths of the lines in that band as a function of the rotational quantum number. The gases used for foreign broadening were nitrogen, argon and helium. Absorption measurements of water vapor-nitrogen and mixtures were made in the 10.4 micron region. The absorption coefficient of the continuum in this region was found to have a positive slope with increasing wavenumber. Preliminary studies were done measuring the temperature dependence of the water vapor absorption coefficient at wavelengths corresponding to the P(20) and the P(32) lines of the CO2 laser. The temperature range covered was from 30 C to 55 C.A positive temperature coefficient of about 0.5% change/C was obtained. (Author).
| Author | : Jerry L. Wagner |
| Publisher | : |
| Total Pages | : 72 |
| Release | : 1973 |
| Genre | : Gas lasers |
| ISBN | : |
Download Temperature Dependence of CO2 Laser Radiation Absorption in SF6 -air Mixtures Book in PDF, ePub and Kindle
Experimental results for the temperature dependence of the 10.6 micrometer absorption coefficient of SF6-air mixtures are presented. A summary from previous works is also presented which provides complete variations of absorption coefficient with pressure, wavelength, and temperature. This fundamental physical data provides insight into the understanding of laser radiation absorption mechanisms in SF6-air mixtures. (Author).
| Author | : |
| Publisher | : |
| Total Pages | : 850 |
| Release | : |
| Genre | : Science |
| ISBN | : |
Download Technical Abstract Bulletin Book in PDF, ePub and Kindle
| Author | : R. A. McClatchey |
| Publisher | : |
| Total Pages | : 180 |
| Release | : 1974 |
| Genre | : Aerosols |
| ISBN | : |
Download Atmospheric Attenuation of Laser Radiation from 0.76 to 31.25 Micrometers Book in PDF, ePub and Kindle
High resolution atmospheric transmittance curves are presented for the spectral region 320 to 13,200/cm (0.7576 to 31.25 micrometers). These spectra are useful as a guide for selecting laser wavelengths for atmospheric propagation studies in this spectral region. In addition, this report provides attenuation coefficients for those lines of the CO, HF, DF, and CO2 laser systems which suffer the least atmospheric attenuation. A new aerosol model is introduced here, taking into account recent measurements of the complex index of refraction of aerosol particles. (Author).
| Author | : John David Anderson (Jr.) |
| Publisher | : |
| Total Pages | : 114 |
| Release | : 1972 |
| Genre | : Boundary layer |
| ISBN | : |
Download CO2 Laser Radiation Absorption in SF6 -air Boundary Layers Book in PDF, ePub and Kindle
Previous investigators have shown that gaseous sulfur hexafluoride (SF6) is a strong absorber of radiation at 10.6 micrometers. This wavelength also corresponds to the output from common CO2 lasers. New experimental and theoretical results are presented for the 10.6 micrometers absorption coefficient and saturation properties of SF6-air mixtures at conditions near standard sea level. Variations with pressure, wavelength and temperature are measured. Results for 10 percent SF6-90 percent air at 1 atm show that such mixtures are stron absorbers of CO2 laser radiation, and that saturation intensities are larger than 10,000 watts/sq cm. Measurements of CO2 laser radiation absorption within boundary layers with SF6 injection are made on the sidewall of a small subsonic wind tunnel. The beam intensity is attenuated by several orders of magnitude due to absorption by the SF6. (Author).
| Author | : |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 1972 |
| Genre | : |
| ISBN | : |
Download Construction of a Carbon Dioxide TEA(Transversely Excited Atmospheric) Laser Book in PDF, ePub and Kindle
The recent development of CO2 Transverse Excitation at Atmospheric Pressure (TEA) lasers has generated expanding interest and success due to their high pulsed power capabilities and simplicity of construction. The authors therefore decided to construct a CO2 TEA laser because of the need for a high powered, pulsed, coherent radiation source with wave length near 10 microns to conduct absorption studies of laser-induced plasmas. It was decided that the constructed laser should have an output energy per pulse between 10 to 50 joules with a pulse time between 0.1 to 1.0 microseconds. This paper deals with the construction of that laser, and includes a discussion of the background and physics of operation of the CO2 TEA laser. (Author).
| Author | : Douglas Harmon Barr |
| Publisher | : |
| Total Pages | : 56 |
| Release | : 1972 |
| Genre | : Physics |
| ISBN | : |
Download Construction of a Carbon Dioxide TEA(Transversely Excited Atmospheric) Laser Book in PDF, ePub and Kindle
The recent development of CO2 Transverse Excitation at Atmospheric Pressure (TEA) lasers has generated expanding interest and success due to their high pulsed power capabilities and simplicity of construction. The authors therefore decided to construct a CO2 TEA laser because of the need for a high powered, pulsed, coherent radiation source with wave length near 10 microns to conduct absorption studies of laser-induced plasmas. It was decided that the constructed laser should have an output energy per pulse between 10 to 50 joules with a pulse time between 0.1 to 1.0 microseconds. This paper deals with the construction of that laser, and includes a discussion of the background and physics of operation of the CO2 TEA laser. (Author).
| Author | : Robert J. Pressley |
| Publisher | : CRC Press |
| Total Pages | : 658 |
| Release | : 1971 |
| Genre | : Science |
| ISBN | : |
Download CRC Handbook of Lasers Book in PDF, ePub and Kindle
Critically evaluated original data, both published and unpublished, relevant to laser research and development. Listings of laser transitions represent data as of summer, 1970. Arrangement by 21 topics. References included. Tables, charts, graphs. Index of wavelengths, subject index.
