Optimum design calculations for detectors based on ZnSe(Те,О) scintillators

Katrunov, K.; Ryzhikov, V. D.; Gavrilyuk, V. P.; Naydenov, S. V.; Lysetska, Olena K.; Litichevskyi, V.

doi:10.1016/j.nima.2013.01.065

Cited by 17 publications

(9 citation statements)

References 2 publications

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“…Breaking the symmetry of a scintillation crystal was also found to be advantageous for high light output [15]. In line with these findings, recent Monte Carlo studies of the effect of crystal shape indicated that a noticeable improvement of the light response of the detector can be achieved by reducing the symmetry of the scintillator crystal [16].…”

Section: Introductionmentioning

confidence: 69%

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Impact of geometry on light collection efficiency of scintillation detectors for cryogenic rare event searches

Danevich

Kobychev

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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Simulations of photon propagation in scintillation detectors were performed with the aim to find the optimal scintillator geometry, surface treatment, and shape of external reflector in order to achieve maximum light collection efficiency for detector configurations that avoid direct optical coupling, a situation that is commonly found in cryogenic scintillating bolometers in experimental searches for double beta decay and dark matter. To evaluate the light collection efficiency of various geometrical configurations we used the ZEMAX ray-tracing software. It was found that scintillators in the shape of a triangular prism with an external mirror shaped as truncated cone gives the highest light collection efficiency. The results of the simulations were confirmed by carrying out measurements of the light collection efficiencies of CaWO 4 crystal scintillators. A comparison of simulated and measured values of light output shows good agreement.

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Section: Introductionmentioning

confidence: 69%

“…4). It should be noted that according to recent studies [16] the amount of light escaping the crystal through the side surfaces depends on the angle between the surfaces, leading to minima and maxima at certain angles. It is very likely that the behaviour observed here is the manifestation of this effect.…”

Section: Results Of Simulationsmentioning

confidence: 99%

Impact of geometry on light collection efficiency of scintillation detectors for cryogenic rare event searches

Danevich

Kobychev

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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show abstract

“…Alternatively, τ can be calculated by the Monte Carlo method using different computer codes (see e.g. [17]). In some particular cases the coefficient of light collection can be calculated directly, or in the frames of the diffusion model (see e.g.…”

Section: Theoretical Model Of Light Converter With Internal Scatteringmentioning

confidence: 99%

Improved efficiency of planar light converters based on Al2O3-YAG:Ce eutectic crystals: Physical Trends and Limits

Naydenov,

Vovk,

Siryk

et al. 2021

Preprint

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A theoretical model of a crystalline converter of white light with internal scattering medium is proposed. Obtained are the expressions for estimation of the light converter efficiency depending on its optical parameters (refractive index and coefficients of absorption at the wavelengths of the incident and re-emitted light), as well as on the geometrical dimensions and the scattering indicatrix of the optical system. The physical limits of improvement of the converter efficiency due to strong internal scattering, are established. Realized are the theoretical and experimental estimations of the efficiency of the light converter based on the crystals of Al2O3-YAG:Ce eutectic alloy which amounts to 16%. This is twice as high in comparison with the efficiency of the light converter based on YAG:Ce single crystal.

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“…This strategy may not be adapted for all isotropic sources, especially for massive homogeneous media like concentrators, scintillators, or NV diamonds. This is why light extraction has been explored for 70 years [3][4][5][6][7][8][9][10] in the scintillator domain. However, it is also important to focus our attention on other media like luminescent concentrators [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] and NV diamonds.…”

Section: Introductionmentioning

confidence: 99%

Light Extraction and Brightness Enhancement of Luminescent Rectangular Slabs

Pichon

Lopez

Nourry-Martin

et al. 2022

Advanced Photonics Research

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The extraction efficiency and the brightness are critical parameters to increase the performance of luminescent rectangular slabs such as scintillators, luminescent concentrators, or diamonds with NV centers. This work explains how an additional face breaking the rectangular symmetry can improve the extraction efficiency and brightness. The study is based on a fully analytical approach corroborated experimentally with cerium‐doped yttrium aluminum garnet (Ce:YAG) slabs. The model gives an analytical expression of the extraction efficiency and the brightness of the additional face as a function of the slab parameters (dimensions, refractive index, losses). Results highlight that the extraction efficiency by an additional face can be improved even if the area of the additional face is lower than the area of the smallest face of the slab, generally chosen as the output face in a standard configuration. Therefore, the output brightness can be easily improved and controlled by the dimension of the additional face. Balancing the extraction efficiency and the brightness, a 1 × 3 × 22 mm3 Ce:YAG slab with an optimized edge face and with mirrors on the lateral faces exhibits an efficiency 1.9 times better and a brightness 5.6 higher than a Ce:YAG in a standard configuration.

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Optimum design calculations for detectors based on ZnSe(Те,О) scintillators

Cited by 17 publications

References 2 publications

Impact of geometry on light collection efficiency of scintillation detectors for cryogenic rare event searches

Impact of geometry on light collection efficiency of scintillation detectors for cryogenic rare event searches

Improved efficiency of planar light converters based on Al2O3-YAG:Ce eutectic crystals: Physical Trends and Limits

Light Extraction and Brightness Enhancement of Luminescent Rectangular Slabs

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