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Title: Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot

Abstract

Intensified charge-coupled devices (ICCDs) are used extensively in many scientific and engineering environments to image weak or temporally short optical events. To optimize the quantum efficiency of light collection, many of these devices are chosen to have characteristic intensifier gate times that are relatively slow, on the order of tens of nanoseconds. For many measurements associated with nanosecond laser sources, such as scattering-based diagnostics and most laser-induced fluorescence applications, the signals rise and decay sufficiently fast during and after the laser pulse that the intensifier gate may be set to close after the cessation of the signal and still effectively reject interferences associated with longer time scales. However, the relatively long time scale and complex temporal response of laser-induced incandescence (LII) of nanometer-sized particles (such as soot) offer a difficult challenge to the use of slow-gating ICCDs for quantitative measurements. In this paper, ultraviolet Rayleigh scattering imaging is used to quantify the irising effect of a slow-gating scientific ICCD camera, and an analysis is conducted of LII image data collected with this camera as a function of intensifier gate width. The results demonstrate that relatively prompt LII detection, generally desirable to minimize the influences of particle size and local gasmore » pressure and temperature on measurements of the soot volume fraction, is strongly influenced by the irising effect of slow-gating ICCDs.« less

Authors:
;  [1]
  1. Combustion Research Facility, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
21266772
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 80; Journal Issue: 3; Other Information: DOI: 10.1063/1.3089224; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 36 MATERIALS SCIENCE; CAMERAS; CHARGE-COUPLED DEVICES; COMBUSTION; FLUORESCENCE; IMAGES; LASERS; PARTICLE SIZE; QUANTUM EFFICIENCY; RAYLEIGH SCATTERING; SOOT; ULTRAVIOLET RADIATION

Citation Formats

Shaddix, Christopher R, and Williams, Timothy C. Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot. United States: N. p., 2009. Web. doi:10.1063/1.3089224.
Shaddix, Christopher R, & Williams, Timothy C. Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot. United States. https://doi.org/10.1063/1.3089224
Shaddix, Christopher R, and Williams, Timothy C. 2009. "Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot". United States. https://doi.org/10.1063/1.3089224.
@article{osti_21266772,
title = {Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot},
author = {Shaddix, Christopher R and Williams, Timothy C},
abstractNote = {Intensified charge-coupled devices (ICCDs) are used extensively in many scientific and engineering environments to image weak or temporally short optical events. To optimize the quantum efficiency of light collection, many of these devices are chosen to have characteristic intensifier gate times that are relatively slow, on the order of tens of nanoseconds. For many measurements associated with nanosecond laser sources, such as scattering-based diagnostics and most laser-induced fluorescence applications, the signals rise and decay sufficiently fast during and after the laser pulse that the intensifier gate may be set to close after the cessation of the signal and still effectively reject interferences associated with longer time scales. However, the relatively long time scale and complex temporal response of laser-induced incandescence (LII) of nanometer-sized particles (such as soot) offer a difficult challenge to the use of slow-gating ICCDs for quantitative measurements. In this paper, ultraviolet Rayleigh scattering imaging is used to quantify the irising effect of a slow-gating scientific ICCD camera, and an analysis is conducted of LII image data collected with this camera as a function of intensifier gate width. The results demonstrate that relatively prompt LII detection, generally desirable to minimize the influences of particle size and local gas pressure and temperature on measurements of the soot volume fraction, is strongly influenced by the irising effect of slow-gating ICCDs.},
doi = {10.1063/1.3089224},
url = {https://www.osti.gov/biblio/21266772}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 3,
volume = 80,
place = {United States},
year = {Sun Mar 15 00:00:00 EDT 2009},
month = {Sun Mar 15 00:00:00 EDT 2009}
}