Combined scattering-referenced and co-doped aerosol phosphor thermometry using the Ce,Pr:LuAG phosphor

Herzog, Joshua; Witkowski, Dustin; Rothamer, David

doi:10.1007/s00340-021-07648-z

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…Based on the estimated precisions (using a metric of 40 K single-shot precision), singly-doped Pr:CSSO appears feasible for single-shot measurements from approximately 425 K to at least 800 K. Singly-doped Ce:CSSO using a combination of host-reference APT, host SRAPT, and Ce 3+ SRAPT appears feasible for single-shot measurements from 350 K to at least 1400 K, although precision will be marginal in the 950-1050 K range. The co-doped Ce,Pr:CSSO phosphor extends the low end of the temperature measurement range, and single-shot measurements appear feasible from 300 to 925 K and from 1030 K to at least 1400 K. It should be noted that with the Ce:CSSO and Ce,Pr:CSSO phosphors, the three measurements mentioned can be made simultaneously (Ce 3+ SRAPT, host SRAPT, and host-referenced APT for Ce:CSSO; and Ce 3+ SRAPT, Pr 3+ SRAPT, and co-doped APT for Ce,Pr:CSSO), allowing the entire temperature range stated to be covered in a single experiment (please refer to [2,25] for a detailed discussion relating to the combination of APT techniques). Additionally, PIV can be performed simultaneously using the Mie scattering signal acquired for SRAPT measurements.…”

Section: Apt Diagnostic Performance Predictionsmentioning

confidence: 99%

Characterization of Ce:CSSO, Pr:CSSO, and co-doped Ce,Pr:CSSO phosphors for aerosol phosphor thermometry

Herzog¹,

Witkowski²,

Rothamer³

2021

Meas. Sci. Technol.

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The phosphor Ce:Ca3Sc2Si3O12(Ce:CSSO) was recently investigated for aerosol phosphor thermometry (APT) and shown to be capable of temperature imaging up to at least 1400 K. To date, no thorough characterization of the temperature dependent emission properties of the phosphor has been performed up to 1400 K. Additionally, due to limited sensitivity over certain temperature ranges continuous temperature imaging from 300 to 1400 K was not possible. Here, cerium and praseodymium doped into CSSO are investigated to address these limitations. Singly-doped Ce:CSSO and Pr:CSSO, and co-doped Ce,Pr:CSSO phosphor samples were studied. Emission lifetimes and quenching behavior were characterized in a tube furnace for each phosphor. Results from the singly-doped phosphors were used to interpret the co-doped phosphor results. The phosphor characterization data was used to estimate thermometry performance at temperatures relevant to low-temperature ignition studies in engines. The proposed diagnostic uses a combination of co-doped APT, host-referenced APT, and scattering-referenced APT approaches to increase the range over which high-precision temperature measurements can be made. Characterization results include the first reported measurements of luminescence lifetimes for Ce:CSSO and Pr:CSSO at temperatures up to 1400 K, and the highest reported quenching temperature for a phosphor using 4f5d emission (1230 K for Ce:CSSO). Furnace measurements showed a normalized temperature-sensitivity of > 0.25 % K−1 from room temperature to 1400 K for at least one diagnostic approach using the co-doped Ce,Pr:CSSO phosphor. Estimates suggest that the co-doped Ce,Pr:CSSO phosphor is feasible for APT at temperatures ranging from 300 to 925 K and 1030 to at least 1400 K, with better than 40-K single-shot precision. The performance of Ce:CSSO and Ce,Pr:CSSO are similar throughout the investigated temperature range.

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Section: Apt Diagnostic Performance Predictionsmentioning

confidence: 99%

Characterization of Ce:CSSO, Pr:CSSO, and co-doped Ce,Pr:CSSO phosphors for aerosol phosphor thermometry

Herzog¹,

Witkowski²,

Rothamer³

2021

Meas. Sci. Technol.

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“…They also grew Ce, Pr:LuYAG crystals [17] and pointed to their potential application in white LED lighting. More interestingly, because the emission wavelengths of the Pr 3+ and Ce 3+ ions are well separated, Ce, Pr:LuAG was recently used as a high-precision temperature imaging technique [18][19][20]. However, previous studies have shown that the antisite defect [3] in LuAG would introduce slow scintillation decay components and decrease scintillation efficiency in both Ce: LuAG and Pr:LuAG crystals.…”

Section: Introductionmentioning

confidence: 99%

Ce3+, Pr3+ Co-Doped Lu3Al5O12 Single Crystals and Ceramics: A Comparative Study

et al. 2022

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Ce3+, Pr3+ co-doped Lu3Al5O12 (Ce, Pr:LuAG) single crystals and ceramics were prepared using the optical floating zone (OFZ) and reactive vacuum sintering methods, respectively. The microstructure, photo- (λex = 450 nm), and radio-luminescence (under X-ray excitation) performance, as well as scintillation light yield (LY, under γ-ray, 137Cs source) of both materials, were investigated and compared. Ce, Pr:LuAG ceramics had an in-line transmittance of approximately 20% in the visible light range, while the analogous crystals were more transparent (~65%). The X-ray excited luminescent (XEL) spectra showed the characteristic Ce 3+ and Pr3+ emissions located at 310 nm, 380 nm, and 510 nm. The highest LY of the Ce, Pr:LuAG ceramics reached 34,112 pho/MeV at 2 μs time gate, which is higher than that of a single crystal. The ratio of LY values (LY2/LY0.75) between shaping times of 0.75 μs and 2 μs indicated a faster scintillation decay of ceramics regarding single crystals. It was ascribed to the lower effective concentration of luminescent activators in single crystals because of the coefficient segregation effect.

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Photoluminescence characteristics of CaSrSiO4: Yb3+, Er3+, Ag phosphor and its application on optical temperature sensor

et al. 2022

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Combined scattering-referenced and co-doped aerosol phosphor thermometry using the Ce,Pr:LuAG phosphor

Cited by 4 publications

References 24 publications

Characterization of Ce:CSSO, Pr:CSSO, and co-doped Ce,Pr:CSSO phosphors for aerosol phosphor thermometry

Characterization of Ce:CSSO, Pr:CSSO, and co-doped Ce,Pr:CSSO phosphors for aerosol phosphor thermometry

Ce3+, Pr3+ Co-Doped Lu3Al5O12 Single Crystals and Ceramics: A Comparative Study

Photoluminescence characteristics of CaSrSiO4: Yb3+, Er3+, Ag phosphor and its application on optical temperature sensor

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