766 research outputs found
Spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors
We has set up a light scattering spectrometer to study the depolarization of
light scattering in linear alkylbenzene. From the scattering spectra it can be
unambiguously shown that the depolarized part of light scattering belongs to
Rayleigh scattering. The additional depolarized Rayleigh scattering can make
the effective transparency of linear alkylbenzene much better than it was
expected. Therefore sufficient scintillation photons can transmit through the
large liquid scintillator detector of JUNO. Our study is crucial to achieving
the unprecedented energy resolution 3\%/ for JUNO
experiment to determine the neutrino mass hierarchy. The spectroscopic method
can also be used to judge the attribution of the depolarization of other
organic solvents used in neutrino experiments.Comment: 6 pages, 5 figure
Online Fatigue-Monitoring Models with Consideration of Temperature Dependent Properties and Varying Heat Transfer Coefficients
Thermal stress failure caused by alternating operational loads is the one of important damage mechanisms in the nuclear power plants. To evaluate the thermal stress responses, the Green’s function approach has been generally used. In this paper, a method to consider varying heat transfer coefficients when using the Green’s function method is proposed by using artificial parameter method and superposition principle. Time dependent heat transfer coefficient has been treated by using a modified fluid temperature and a constant heat transfer coefficient. Three-dimensional temperature and stress analyses reflecting entire geometry and heat transfer properties are required to obtain accurate results. An efficient and accurate method is confirmed by comparing its result with corresponding 3D finite element analysis results for a reactor pressure vessel (RPV). From the results, it is found that the temperature dependent material properties and varying heat transfer coefficients can significantly affect the peak stresses and the proposed method can reduce computational efforts with satisfactory accuracy
Human β-defensin 3-combined gold nanoparticles for enhancement of osteogenic differentiation of human periodontal ligament cells in inflammatory microenvironments
- …