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Comparison of photo detectors and operating conditions for decay time determination in phosphor thermometry

Knappe, Christoph LU ; Abou Nada, Fahd Jouda LU ; Richter, Mattias LU and Aldén, Marcus LU (2012) In Review of Scientific Instruments 83(9).
Abstract
This work compares the extent of linear response regions from standard time-resolving optical detectors

for phosphor thermometry. Different types of photomultipliers (ordinary and time-gated) as

well as an avalanche photodiode were tested and compared using the phosphorescence decay time of

cadmium tungstate (CdWO4). Effects originating from incipient detector saturation are revealed as a

change in evaluated phosphorescence decay time, which was found to be a more sensitive measure for

saturation than the conventional signal strength comparison between in- and output. Since the decay

time of thermographic phosphors is used for temperature determination systematic temperature... (More)
This work compares the extent of linear response regions from standard time-resolving optical detectors

for phosphor thermometry. Different types of photomultipliers (ordinary and time-gated) as

well as an avalanche photodiode were tested and compared using the phosphorescence decay time of

cadmium tungstate (CdWO4). Effects originating from incipient detector saturation are revealed as a

change in evaluated phosphorescence decay time, which was found to be a more sensitive measure for

saturation than the conventional signal strength comparison between in- and output. Since the decay

time of thermographic phosphors is used for temperature determination systematic temperature errors

in the order of several tens of Kelvins may be introduced. Saturation from the initial intensity is isolated

from temporally developed saturation by varying the CdWO4 decay time over the microsecond

to nanosecond range, resultant of varying the temperature from 290 to 580 K. A detector mapping procedure

is developed in order to identify linear response regions where the decay-to-temperature evaluations

are unbiased. In addition, this mapping procedure generates a library of the degree of distortion

for operating points outside of linear response regions. Signals collected in the partly saturated regime

can thus be corrected to their unbiased value using this library, extending the usable detector operating

range significantly. © 2012 American Institute of Physics. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
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in
Review of Scientific Instruments
volume
83
issue
9
publisher
American Institute of Physics
external identifiers
  • wos:000309426700049
  • scopus:84866983106
ISSN
1089-7623
DOI
10.1063/1.4746990
language
English
LU publication?
yes
id
f4d82ffe-6c1a-4837-94e5-9c8adbd36a17 (old id 3232478)
date added to LUP
2012-12-07 14:25:58
date last changed
2017-01-01 05:58:48
@article{f4d82ffe-6c1a-4837-94e5-9c8adbd36a17,
  abstract     = {This work compares the extent of linear response regions from standard time-resolving optical detectors<br/><br>
for phosphor thermometry. Different types of photomultipliers (ordinary and time-gated) as<br/><br>
well as an avalanche photodiode were tested and compared using the phosphorescence decay time of<br/><br>
cadmium tungstate (CdWO4). Effects originating from incipient detector saturation are revealed as a<br/><br>
change in evaluated phosphorescence decay time, which was found to be a more sensitive measure for<br/><br>
saturation than the conventional signal strength comparison between in- and output. Since the decay<br/><br>
time of thermographic phosphors is used for temperature determination systematic temperature errors<br/><br>
in the order of several tens of Kelvins may be introduced. Saturation from the initial intensity is isolated<br/><br>
from temporally developed saturation by varying the CdWO4 decay time over the microsecond<br/><br>
to nanosecond range, resultant of varying the temperature from 290 to 580 K. A detector mapping procedure<br/><br>
is developed in order to identify linear response regions where the decay-to-temperature evaluations<br/><br>
are unbiased. In addition, this mapping procedure generates a library of the degree of distortion<br/><br>
for operating points outside of linear response regions. Signals collected in the partly saturated regime<br/><br>
can thus be corrected to their unbiased value using this library, extending the usable detector operating<br/><br>
range significantly. © 2012 American Institute of Physics.},
  articleno    = {094901},
  author       = {Knappe, Christoph and Abou Nada, Fahd Jouda and Richter, Mattias and Aldén, Marcus},
  issn         = {1089-7623},
  language     = {eng},
  number       = {9},
  publisher    = {American Institute of Physics},
  series       = {Review of Scientific Instruments},
  title        = {Comparison of photo detectors and operating conditions for decay time determination in phosphor thermometry},
  url          = {http://dx.doi.org/10.1063/1.4746990},
  volume       = {83},
  year         = {2012},
}