The frequency range of terahertz (THz) has shown great promise for optical communication due to its enormous bandwidth and low interference. This review paper provides a thorough analysis of the latest developments an...
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The utilization of large-scale neutron detector arrays in future experiments is of vital importance to increase our understanding of beta-delayed neutron emitters. A new device, DAEMON (Detector Array for Energy Measu...
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The utilization of large-scale neutron detector arrays in future experiments is of vital importance to increase our understanding of beta-delayed neutron emitters. A new device, DAEMON (Detector Array for Energy Measurements Of Neutrons), is being designed for the GRIFFIN decay station at TRIUMF-ISAC. DAEMON will improve the precision on the measurement of the neutron kinetic energy through the use of thin plastic scintillators, SiPMs arrays, and the Time-of-Flight technique, to enhance the current capabilities to study neutron rich nuclei at TRIUMF. The performance and feasibility of the DAEMON array was investigated using the Geant4 package to simulate and optimize the experimental design. To test the optical parameters and models implemented in the Geant4 simulations, a comparison with experimental data from small plastic scintillators combined with SiPM detectors was performed. The simulations reproduce the experimental data very well, including features introduced by summing 2 x 2-SiPM arrays in software. This work lays the foundation for simulations of the full DAEMON array.
An immature understanding of the mechanisms of persistent luminescence(PersL)has hindered the development of new persistent luminescent materials(PersLMs)with increased *** this regard,in-situ direct current(DC)electr...
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An immature understanding of the mechanisms of persistent luminescence(PersL)has hindered the development of new persistent luminescent materials(PersLMs)with increased *** this regard,in-situ direct current(DC)electric field measurements were conducted on a layered structure composed of the SrAl_(2)O_(4):Eu^(2+),Dy^(3+)phosphor,and an *** this study,the photoluminescence(PL)and afterglow properties were investigated with respect to voltage by analyzing the current signal and thermoluminescence(TL)*** intensity of PersL increased due to a novel phenomenon known as“external electric field stimulated enhancement of initial brightness of afterglow”.This dynamic process was illustrated via the use of a rate equation approach,where the electrons trapped by the ultra-shallow trap at 0.022 ev could be transferred through the conduction band during long *** afterglow intensity could reach 0.538 cdm^(-2)at a 6 v electric *** design of an electric field stimulation technique enables the enhancement of the intensity of PersLMs and provides a new perspective for exploring the fundamental mechanics of certain established PersLMs.
Microinverters are typically integrated with individual solar photovoltaic (Pv) modules to enhance system performance. This paper presents the design and evaluation of an interleaved flyback DC-DC converter for microi...
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Metalenses can be used as standalone single elements or incorporated as one component of a subassembly that also includes other non-metalens optical elements. Because of the sub-wavelength length scale of the meta-ato...
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Data driven approaches have proven very efficient in many vision tasks and are now used for optical parameters optimization in application-specific camera design. A neural network is trained to estimate images or imag...
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ISBN:
(纸本)9781510654198;9781510654181
Data driven approaches have proven very efficient in many vision tasks and are now used for optical parameters optimization in application-specific camera design. A neural network is trained to estimate images or image quality indicators from the optical characteristics. The complexity and entanglement of such optical parameters raise new challenges we investigate in the case of wide-angle systems. We highlight them by establishing a data-driven prediction model of the RMS spot size from the distortion using mathematical or AI-based methods.
This work highlights an efficiency enhancement of a lead-free Cs3Sb2Br9-based perovskite solar cell (PSC) by using the transfer matrix method (TMM). This method calculates the optical parameters such as the absorption...
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This work highlights an efficiency enhancement of a lead-free Cs3Sb2Br9-based perovskite solar cell (PSC) by using the transfer matrix method (TMM). This method calculates the optical parameters such as the absorption profile of each layer, and the total reflection profile at the front surface by considering the coherent and incoherent effect in the layers of the Cs3Sb2Br9-based PSC. The calculation of absorption and reflection is done by using the optical electric field (E-field) intensity. The optical E-field intensity profile leads the calculation of the generation of free charge carriers in the absorbing layer and results in the ideal opticalcurrent density Jopt of 24.71 mAcm(-2). Furthermore, the obtained optical parameters after the TMM-based simulation are used to design two different models;'SCAPS model' and 'TMM model', for an electrical simulation using SCAPS-1D software. Finally, the lead-free Cs3Sb2Br9-based PSC using the 'TMM model' obtained an effective electrical performance such as JSC of 17.97 mAcm(-2), vOC of 1.54 v, FF of 74.61%, and PCE of 20.67%, respectively, which encourage for the understanding of the operational mechanism of the PSC and will contribute further efficiency improvement.
This paper presents the active alignment of miniaturized, substrate-free optical thin-film filters (TFFs) according to the filters’ spectral transfer properties for integration into fiber optical networks. optical TF...
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The penetration of conventional energy sources is decreasing while energy demand is increasing. Therefore, alternative energy sources are required to ensure an emission-free environment and to meet energy demands, suc...
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Digital engineering technologies are transforming long-stagnant development processes by applying the tremendous advancements in Information Technology (IT) to classical engineering tasks such as design, analysis, and...
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ISBN:
(纸本)9781510654198;9781510654181
Digital engineering technologies are transforming long-stagnant development processes by applying the tremendous advancements in Information Technology (IT) to classical engineering tasks such as design, analysis, and fabrication of space-flight instrument structures. Generative design leverages developments in Artificial Intelligence (AI) and Cloud computing to enable a paradigm shift in the design process, allowing the engineer to focus on defining the requirements and objectives of the design while AI generates optimized designs which comply with the input requirements. Digital Manufacturing allows these complex lightweight designs to be efficiently manufactured by directly fabricating from the resulting 3D models. The development of these two Digital engineering technologies realizes significant mass savings while simultaneously reducing structure development time from months to days. This paper describes the development of the Evolved Structures process applying these technologies to spaceflight optical instrument structures including an example demonstrating greater than 10x reduction in development time/cost and greater than 3x improvement in structural performance.
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