The unfolding of neutron spectra from the pulse height distribution measured by a BC501A scintillation detector is accomplished by the application of artificial neural networks (ANN). A simple linear neural network wi...The unfolding of neutron spectra from the pulse height distribution measured by a BC501A scintillation detector is accomplished by the application of artificial neural networks (ANN). A simple linear neural network without biases and hidden layers is adopted. A set of monoenergetic detector response functions in the energy range from 0.25 MeV to 16 MeV with an energy interval of 0.25 MeV are generated by the Monte Carlo code O5S in the training phase of the unfolding process. The capability of ANN was demonstrated successfully using the Monte Carlo data itself and experimental data obtained from the Am-Be neutron source and D-T neutron source.展开更多
The space-based laser interferometers,LISA,Taiji and TianQin,are targeting to observe milliHz gravitational waves(GWs)in the 2030s.The joint observations from multiple space-based detectors yield significant advantage...The space-based laser interferometers,LISA,Taiji and TianQin,are targeting to observe milliHz gravitational waves(GWs)in the 2030s.The joint observations from multiple space-based detectors yield significant advantages.In this work,we recap the studies and investigations for the joint space-based GW detector networks to highlight:1)the high precision of sky localization for the massive binary black hole(BBH)coalescences and the GW sirens in the cosmological implication,2)the effectiveness to test the parity violation in the stochastic GW background observations,3)the efficiency of subtracting galactic foreground,4)the improvement in stellar-mass BBH observations.We inspect alternative networks by trading off massive BBH observations and stochastic GW background observation.展开更多
We investigate the capabilities of space-based gravitational-wave detector networks,specifically Taiji and LISA,to measure the anisotropies in stochastic gravitational-wave background(SGWB),which are characterized by ...We investigate the capabilities of space-based gravitational-wave detector networks,specifically Taiji and LISA,to measure the anisotropies in stochastic gravitational-wave background(SGWB),which are characterized by the angular power spectrum.We find that a detector network can improve the measurement precision of anisotropies by at most fourteen orders of magnitude,depending on the angular multipoles.By doing so,we can enhance our understanding of the physical origins of SGWB,both in astrophysical and cosmological contexts.We assess the prospects of the detector networks for measuring the parameters of angular power spectrum.We further find an inevitable effect of cosmic variance,which can be suppressed by a better angular resolution,strengthening the importance of configuring detector networks.Our findings also suggest a potential detection of the kinematic dipole due to Doppler boosting of SGWB.展开更多
基金supported by the National Magnetic Confinement Fusion Science Program (Grant No. 2010GB111002)
文摘The unfolding of neutron spectra from the pulse height distribution measured by a BC501A scintillation detector is accomplished by the application of artificial neural networks (ANN). A simple linear neural network without biases and hidden layers is adopted. A set of monoenergetic detector response functions in the energy range from 0.25 MeV to 16 MeV with an energy interval of 0.25 MeV are generated by the Monte Carlo code O5S in the training phase of the unfolding process. The capability of ANN was demonstrated successfully using the Monte Carlo data itself and experimental data obtained from the Am-Be neutron source and D-T neutron source.
基金supported in part by the National Natural Science Foundation of China(11821505)supported in part by the National Key Research and Development Program of China(2020YFC2201501)+7 种基金in part by the National Natural Science Foundation of China(12075297 and 12235019)supported in part by the National Key R&D Program of China(2021YFC2203001)supported by the National Natural Science Foundation of China(12147132)supported by the National Key Program for Science and Technology Research and Development(2020YFC2201400,2022YFC2205201)supported in part by the National Key R&D Program of China under(2021YFC2201901)supported in part by JSPS Kakenhi Grant-in-Aid for Scientific Research(17H06358,19K03870 and 23K03385)supported by the National Key R&D Program of China(2021YFC2201903)National Natural Science Foundation of China(12003059).
文摘The space-based laser interferometers,LISA,Taiji and TianQin,are targeting to observe milliHz gravitational waves(GWs)in the 2030s.The joint observations from multiple space-based detectors yield significant advantages.In this work,we recap the studies and investigations for the joint space-based GW detector networks to highlight:1)the high precision of sky localization for the massive binary black hole(BBH)coalescences and the GW sirens in the cosmological implication,2)the effectiveness to test the parity violation in the stochastic GW background observations,3)the efficiency of subtracting galactic foreground,4)the improvement in stellar-mass BBH observations.We inspect alternative networks by trading off massive BBH observations and stochastic GW background observation.
基金supported by the National Key Research and Development Program of China (Grant No.2021YFC2203001)supported by the National Natural Science Foundation of China (Grant No.12175243)+2 种基金the National Key R&D Program of China (Grant No.2023YFC2206403)the Science Research Grants from the China Manned Space Project (Grant No.CMS-CSST-2021-B01)supported by the Highperformance Computing Platform of China Agricultural University。
文摘We investigate the capabilities of space-based gravitational-wave detector networks,specifically Taiji and LISA,to measure the anisotropies in stochastic gravitational-wave background(SGWB),which are characterized by the angular power spectrum.We find that a detector network can improve the measurement precision of anisotropies by at most fourteen orders of magnitude,depending on the angular multipoles.By doing so,we can enhance our understanding of the physical origins of SGWB,both in astrophysical and cosmological contexts.We assess the prospects of the detector networks for measuring the parameters of angular power spectrum.We further find an inevitable effect of cosmic variance,which can be suppressed by a better angular resolution,strengthening the importance of configuring detector networks.Our findings also suggest a potential detection of the kinematic dipole due to Doppler boosting of SGWB.
