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

Feuk, Henrik; Sanned, David; Richter, Mattias; Aldén, Marcus

doi:10.1088/1361-6501/abfb1e

Cited by 11 publications

(6 citation statements)

References 15 publications

(22 reference statements)

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“…In this case, the sampling rate of the detector must be sufficiently high to resolve the temporal decay (typically in the range of some hundred ns to 5 ms [5,19]), and the measurement time is as long as the slowest decay to be resolved. For point temperature measurements with the PDT method, photomultipliers (PMT) can be utilized [25,26]. If a planar temperature field is to be resolved, the decay time can be recorded using framing cameras.…”

Section: Phosphor Thermometry In Fluidsmentioning

confidence: 99%

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN₃:Eu²⁺

Bollmann

Hickl

Preuster

et al. 2022

Meas. Sci. Technol.

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Temperature control in heat exchangers in reacting and non-reacting flows is of great importance for process optimization. In this context, phosphor thermometry is a promising technique for remote planar temperature sensing. The thermometry technique is based on exciting a luminescent material by a laser pulse and analysing the subsequent phosphorescence signal. A particular interesting application is chemical hydrogen storage using liquid organic hydrogen carrier (LOHC) systems. The knowledge of temperature fields is of special interest for the characterisation and understanding of hydrogen release from the carrier liquid. We investigated the luminescence properties of the thermographic phosphor (Sr,Ca)SiAIN3:Eu2+ (“SCASN:Eu2+”) dispersed in different heat transfer fluids, in particular LOHC systems, using a newly developed calibration cell. As heat transfer fluids may be excited to fluorescence by the laser as well, their absorption and florescence behaviour is studied to develop an excitation and detection concept for thermometry. We found strong absorption of the heat transfer fluids from the UV range to a wavelength of about 400 nm. In addition, fluorescence signals were found in the visible wavelength range, which can interfere with the phosphor emissions. These fluorescence signals should therefore be circumvented by utilizing the different luminescence decay times in the chosen detection strategy. For thermometry, the SCASN:Eu2+ particles were excited by a laser sheet of a 532 nm Nd:YAG laser. A spectrometer and photomultiplier tube (PMT) were used to detect the emission spectrum and phosphorescence decay time. Two temperature evaluation strategies were applied, which are based on either the intensity ratio of two spectral emission regions (two-colour laser-induced phosphorescence) or the phosphorescence decay time. The results obtained show an applicable measurement range between 293 K and 598 K for the intensity ratio method with a maximum relative sensitivity of 0.12 % K-1 at 293 K. For the phosphorescence decay time method, the phosphor allows measurements between 423 K and 598 K with a maximum relative sensitivity of 0.56 % K-1 at 598 K.

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Section: Phosphor Thermometry In Fluidsmentioning

confidence: 99%

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN₃:Eu²⁺

Bollmann

Hickl

Preuster

et al. 2022

Meas. Sci. Technol.

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“…The oscilloscope settings are then saved and used the next time the same configuration is used. Sources of error due to PMT nonlinearity were considered and minimized [15]. In situations where the luminescence of the configurations differs significantly, the laser pulse energy can be customized for each configuration to improve detector linearity.…”

Section: Experimental Setup and Calibration Programmentioning

confidence: 99%

Automated phosphor thermometry lifetime calibration of multiple phosphors and emission lines to above 1900 K

Feuk

Nilsson

Richter

2022

Meas. Sci. Technol.

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A method is specified which enables lifetime calibration of multiple phosphors and emission lines at the same time to temperatures above 1900 K. The experimental setup and algorithm used for data collection and experimental equipment control are described. The phosphors were coated on an alumina oxide disc and the reference temperature was measured using three type B thermocouples. The algorithm automates the data collection process such that no input from an operator is required during operation. The potential systematic error in calibration temperature was evaluated and was less than 1 % around 1400 K.

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“…With the Mie theory [20]- [25], we can determine the diffusing factor μsca(λ), anisotropy factor g(λ), and decreased diffusing factor δsca(λ) with the:…”

Section: Scattering Computationmentioning

confidence: 99%

The application YAG:Ce3+@SiO2 phosphor for improving color deviation of phosphor-converted light-emitting diode

Le²

2022

IJEECS

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The yellow phosphor Y3Al5O12:Ce3+ (YAG:Ce3+), which sees its most popular use in white light-emitting diode (wLEDs), possess an optical spectrum that lacks the red element. The following article will propose a fresh solution for this problem, which involves adjusting the properties of Ce3+ spectrum by using exterior dye particles of ATTO-Rho101, possessing dramatic, wide absorption within the zone of green-yellow spectrum of Ce3+ emission and significant release of the red element. The globular YAG:Ce3+, which is micrometer and nanometer in size with significant dispersion (micro/nano-YAG:Ce3+) was created by employing an altered solvothermal technique. The YAG:Ce3+ produced by said technique, along with the heated micro-YAG:Ce3+ and commercial phosphors, were exteriorly covered with SiO2 and immersed in dye at the same time. Effective radiant transmission/reabsorption from Ce3+ within the YAG’s internal bowel to the dye particles of the exterior hull of SiO2, regardless of the phosphors’ size, was displayed in the YAG: Ce3+@SiO2+ dye powder amassed over the stimulation of the light of blue, which boosted the red element of it. The fluorescent microscope was considered an effective device intended for detecting the reabsorption event in grinded substances.

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

Cited by 11 publications

References 15 publications

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN₃:Eu²⁺

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN₃:Eu²⁺

Automated phosphor thermometry lifetime calibration of multiple phosphors and emission lines to above 1900 K

The application YAG:Ce3+@SiO2 phosphor for improving color deviation of phosphor-converted light-emitting diode

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

Cited by 11 publications

References 15 publications

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN3:Eu2+

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN3:Eu2+

Automated phosphor thermometry lifetime calibration of multiple phosphors and emission lines to above 1900 K

The application YAG:Ce3+@SiO2 phosphor for improving color deviation of phosphor-converted light-emitting diode

Contact Info

Product

Resources

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Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN₃:Eu²⁺

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr,Ca)SiAlN₃:Eu²⁺