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Range-resolved detection of potassium chloride using picosecond differential absorption light detection and ranging

Leffler, Tomas LU ; Brackmann, Christian LU ; Ehn, Andreas LU ; Kaldvee, Billy LU ; Aldén, Marcus LU ; Berg, Magnus and Bood, Joakim LU (2015) In Applied Optics 54(5). p.1058-1064
Abstract
A laser diagnostic concept for measurement of potassium chloride (KCl) and potentially other alkali compounds in large-scale boilers and furnaces of limited optical access is presented. Single-ended, range-resolved, quantitative detection of KCl is achieved by differential absorption light detection and ranging (DIAL) based on picosecond laser pulses. Picosecond DIAL results have been compared experimentally with line-of-sight measurements using a commercial instrument, the in situ alkali chloride monitor (IACM), utilizing differential optical absorption spectroscopy. For centimeter-scale range resolution and a collection distance of 2.5 m, picosecond DIAL allowed for measurement of KCl concentrations around 130 ppm at 1200 K, in good... (More)
A laser diagnostic concept for measurement of potassium chloride (KCl) and potentially other alkali compounds in large-scale boilers and furnaces of limited optical access is presented. Single-ended, range-resolved, quantitative detection of KCl is achieved by differential absorption light detection and ranging (DIAL) based on picosecond laser pulses. Picosecond DIAL results have been compared experimentally with line-of-sight measurements using a commercial instrument, the in situ alkali chloride monitor (IACM), utilizing differential optical absorption spectroscopy. For centimeter-scale range resolution and a collection distance of 2.5 m, picosecond DIAL allowed for measurement of KCl concentrations around 130 ppm at 1200 K, in good agreement with values obtained by IACM. The DIAL data indicate a KCl detection limit of around 30 ppm for the present experimental conditions. In addition, a double-pulse DIAL setup has been developed and demonstrated for measurements under dynamic conditions with strong Mie scattering. The picosecond DIAL results are discussed and related to possible implementations of the method for measurements in industrial environments. (C) 2015 Optical Society of America (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
54
issue
5
pages
1058 - 1064
publisher
OSA
external identifiers
  • wos:000349684600013
  • scopus:84942372066
ISSN
2155-3165
DOI
10.1364/AO.54.001058
language
English
LU publication?
yes
id
59f60e8b-411b-47a6-87ab-f810a4c873dd (old id 5160181)
date added to LUP
2015-03-25 08:35:51
date last changed
2017-03-05 03:09:02
@article{59f60e8b-411b-47a6-87ab-f810a4c873dd,
  abstract     = {A laser diagnostic concept for measurement of potassium chloride (KCl) and potentially other alkali compounds in large-scale boilers and furnaces of limited optical access is presented. Single-ended, range-resolved, quantitative detection of KCl is achieved by differential absorption light detection and ranging (DIAL) based on picosecond laser pulses. Picosecond DIAL results have been compared experimentally with line-of-sight measurements using a commercial instrument, the in situ alkali chloride monitor (IACM), utilizing differential optical absorption spectroscopy. For centimeter-scale range resolution and a collection distance of 2.5 m, picosecond DIAL allowed for measurement of KCl concentrations around 130 ppm at 1200 K, in good agreement with values obtained by IACM. The DIAL data indicate a KCl detection limit of around 30 ppm for the present experimental conditions. In addition, a double-pulse DIAL setup has been developed and demonstrated for measurements under dynamic conditions with strong Mie scattering. The picosecond DIAL results are discussed and related to possible implementations of the method for measurements in industrial environments. (C) 2015 Optical Society of America},
  author       = {Leffler, Tomas and Brackmann, Christian and Ehn, Andreas and Kaldvee, Billy and Aldén, Marcus and Berg, Magnus and Bood, Joakim},
  issn         = {2155-3165},
  language     = {eng},
  number       = {5},
  pages        = {1058--1064},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Range-resolved detection of potassium chloride using picosecond differential absorption light detection and ranging},
  url          = {http://dx.doi.org/10.1364/AO.54.001058},
  volume       = {54},
  year         = {2015},
}