title: Accuracy and precision of single-pulse one-dimensional vibrational coherent anti-Stokes Raman-scattering temperature measurements.
abstract: The accuracy and precision of time-resolved one-dimensional temperature measurements using single-pulse one-dimensional N(2) vibrational coherent anti-Stokes Raman scattering along a line have been investigated in air in the temperature range from 300 to 1500 K. For this, the experimental spectra were taken in a high-temperature oven at atmospheric pressure. A planar BOXCARS phase-matching geometry was employed to generate the signal along a 6.16-mm line directed perpendicular to the beam propagation. With the used imaging optics, in this direction a spatial resolution of 86 mum was achieved. Depending on the set temperature, the agreement between the thermocouple readings and the mean values of the evalutated coherent anti-Stokes Raman-scattering temperatures is better than 40 K. The applicability of this new technique for the time-resolved measurement of temperature gradients is demonstrated along a line that crosses the flame front in a premixed laminar CH(4)-air flame.
authors.forename: J
authors.initials: J
authors.lastname: Jonuscheit
authors.forename: A
authors.initials: A
authors.lastname: Thumann
authors.forename: M
authors.initials: M
authors.lastname: Schenk
authors.forename: T
authors.initials: T
authors.lastname: Seeger
authors.forename: A
authors.initials: A
authors.lastname: Leipertz