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Sources of error for single-shot PMT-based phosphor thermometry in harsh conditions

Feuk, Henrik LU orcid ; Sanned, David LU ; Richter, Mattias LU and Aldén, Marcus LU (2021) In Measurement Science and Technology 32(8).
Abstract

This study investigates photomultiplier tube (PMT) nonlinearities, relevant for lifetime phosphor thermometry, at various decay times to assess and minimize the impact on temperature measurement accuracy. The focus is single-shot measurements performed in harsh environments where phosphor signal attenuation often is a concern. The sensitivity of decay time measurements to changing phosphorescence intensity is therefore investigated. The experimental results show that for the studied phosphors and detectors, shorter decay times between 20 ns and 6 µs, saturation effects in the PMTs decreased the measured decay time with increasing signal attenuation. For longer phosphorescence decay times, in the millisecond regime, nonlinearity effects... (More)

This study investigates photomultiplier tube (PMT) nonlinearities, relevant for lifetime phosphor thermometry, at various decay times to assess and minimize the impact on temperature measurement accuracy. The focus is single-shot measurements performed in harsh environments where phosphor signal attenuation often is a concern. The sensitivity of decay time measurements to changing phosphorescence intensity is therefore investigated. The experimental results show that for the studied phosphors and detectors, shorter decay times between 20 ns and 6 µs, saturation effects in the PMTs decreased the measured decay time with increasing signal attenuation. For longer phosphorescence decay times, in the millisecond regime, nonlinearity effects led to an increase in the measured decay time with increasing signal attenuation. The specific detector nonlinearity response will vary among detectors, but the introduced methodology for detector analysis is a useful resource for assessing and improving accuracy in lifetime phosphor thermometry measurements.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
decay time, lanthanides, lifetime, Phosphor thermometry, photomultiplier tube, surface temperature
in
Measurement Science and Technology
volume
32
issue
8
article number
084003
publisher
IOP Publishing
external identifiers
  • scopus:85106995926
ISSN
0957-0233
DOI
10.1088/1361-6501/abfb1e
language
English
LU publication?
yes
id
846496d7-8714-4901-be69-270998323482
date added to LUP
2022-02-04 16:04:22
date last changed
2024-03-13 15:22:03
@article{846496d7-8714-4901-be69-270998323482,
  abstract     = {{<p>This study investigates photomultiplier tube (PMT) nonlinearities, relevant for lifetime phosphor thermometry, at various decay times to assess and minimize the impact on temperature measurement accuracy. The focus is single-shot measurements performed in harsh environments where phosphor signal attenuation often is a concern. The sensitivity of decay time measurements to changing phosphorescence intensity is therefore investigated. The experimental results show that for the studied phosphors and detectors, shorter decay times between 20 ns and 6 µs, saturation effects in the PMTs decreased the measured decay time with increasing signal attenuation. For longer phosphorescence decay times, in the millisecond regime, nonlinearity effects led to an increase in the measured decay time with increasing signal attenuation. The specific detector nonlinearity response will vary among detectors, but the introduced methodology for detector analysis is a useful resource for assessing and improving accuracy in lifetime phosphor thermometry measurements.</p>}},
  author       = {{Feuk, Henrik and Sanned, David and Richter, Mattias and Aldén, Marcus}},
  issn         = {{0957-0233}},
  keywords     = {{decay time; lanthanides; lifetime; Phosphor thermometry; photomultiplier tube; surface temperature}},
  language     = {{eng}},
  number       = {{8}},
  publisher    = {{IOP Publishing}},
  series       = {{Measurement Science and Technology}},
  title        = {{Sources of error for single-shot PMT-based phosphor thermometry in harsh conditions}},
  url          = {{http://dx.doi.org/10.1088/1361-6501/abfb1e}},
  doi          = {{10.1088/1361-6501/abfb1e}},
  volume       = {{32}},
  year         = {{2021}},
}