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Title: Cavity Attenuation Phase Shift Spectroscopic Detection of Nitrogen Dioxide

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Publication Date:
Research Org.:
Aerodyne Research, Inc.
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Type / Phase:
Resource Type:
Technical Report
Country of Publication:
United States
47 OTHER INSTRUMENTATION; 54 ENVIRONMENTAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; nitrogen dioxide, cavity attenuated phase shift, cavity ringdown, chemiluminescence detection, optical loss, extinction

Citation Formats

Kebabian, Paul L., Wood, Ezra C., Herndon,Scott C., Robinson,Wade A., and Freedman, Andrew. Cavity Attenuation Phase Shift Spectroscopic Detection of Nitrogen Dioxide. United States: N. p., 2007. Web.
Kebabian, Paul L., Wood, Ezra C., Herndon,Scott C., Robinson,Wade A., & Freedman, Andrew. Cavity Attenuation Phase Shift Spectroscopic Detection of Nitrogen Dioxide. United States.
Kebabian, Paul L., Wood, Ezra C., Herndon,Scott C., Robinson,Wade A., and Freedman, Andrew. Fri . "Cavity Attenuation Phase Shift Spectroscopic Detection of Nitrogen Dioxide". United States. doi:.
title = {Cavity Attenuation Phase Shift Spectroscopic Detection of Nitrogen Dioxide},
author = {Kebabian, Paul L. and Wood, Ezra C. and Herndon,Scott C. and Robinson,Wade A. and Freedman, Andrew},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Mar 02 00:00:00 EST 2007},
month = {Fri Mar 02 00:00:00 EST 2007}

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  • Current work with the cavity phase shift (CAPS) method concentrates on hydrogen fluoride laser wavelengths between 2.6 and 3.0 micrometers. This method and continued advancements in experimental techniques are described. With use of a cavity dither the accuracy of reflectance measurements was improved over previous work to + or - 0.0004 for reflectances around 0.995. Results of measurements on dielectric-coated elements are reported, as are studies on metallic monolayers placed on nontransmitting substrates. The required CAPS configuration in these cases is a three-mirror arrangement that permits angle of incidence variation. In this mode the CAPS method becomes a technique formore » verifying the quality of optical coatings on particular resonator designs.« less
  • A simplified method for measuring the effective photon lifetime in an optical resonator was developed. The technique requires the passage of a modulated continuous-wave laser beam through the resonator and the measurement of the resultant shift in the phase of the transmitted intensity. The method not only permits a quick and precise measurement of the mirror reflectances, but also permits these measurements to be in situ. Such an 'on the spot' evaluation capability should be extremely useful in applications ranging from the investigation of new laser systems to the development of improved optical coatings. The method is also sensitive tomore » the effects of absorption, scattering, and transmission from elements in the cavity. Cavity losses smaller than 100 ppm were detected.« less
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  • It has been estimated that the loss to higher-order cavity modes in SPEAR II will be 135 keV per cavity at 100 mA for a 10-cm bunch (sigma/sub z/ = 5 cm). This corresponds to a loss of 10 MeV for a 50-m PEP structure. The power lost to higher modes in each SPEAR II cavity at 100 mA would be 13.5 kW. A loss of this order can be measured by calorimetry. This loss is also large enough to cause a significant increase in the net rf power input into the cavities over the power input with no higher-modemore » excitation. In addition, the higher-mode loss can also produce a measurable shift in the synchronous phase angle. Numbers for these effects are computed in this paper.« less
  • The effects of container material and wall thickness, x-ray quantum energy, and water channel thickness on attenuation factors and per cent change in attenuation were examined in the region between zero and ten volume per cent voids for water in the neighborhood of 500 deg F. Results indicate that, if nucleate boiling effects are to be detected an optimum experiment will require thin-walled tubes of a metal of low atomic number probably no higher than that for aluminum. Energies at 0.015 to 0.02 Mev must be selected to produce adequate meter ranges. (auth)