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Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者: HXMT

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收藏 | 浏览/下载：50/0 | 提交时间：2022/02/08

Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.

Neutron transport and benchmark on granular tungsten samples with 14.8 MeV neutrons 期刊论文 OAI收割
FUSION ENGINEERING AND DESIGN, 2018, 卷号: 135, 页码: 116-120
作者:

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收藏 | 浏览/下载：30/0 | 提交时间：2019/03/27

Leakage neutron spectrum MCNP simulation Evaluated nuclear data Granular tungsten samples

Influence of External Electric Field on Vibrational Spectrum of Imidazolium-Based Ionic Liquids Probed by Molecular Dynamics Simulation 期刊论文 OAI收割
ACTA PHYSICO-CHIMICA SINICA, 2018, 卷号: 8, 期号: 34, 页码: 912-919
作者: Deng YQ(邓友全); Zhang XP(张晓萍); Chen WQ(陈文琼); Guan YJ(关永吉)

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收藏 | 浏览/下载：43/0 | 提交时间：2018/12/29

Vibrational Spectrum External Electric Field Ionic Liquid Molecular Dynamics Simulation

Simulation of longitudinal dynamics of laser-cooled and RF-bunched C-3 vertical bar ion beams at heavy ion storage ring CSRe 期刊论文 OAI收割
CHINESE PHYSICS C, 2017, 卷号: 41, 页码: 7
作者: Yang, Jian-Cheng; Xia, Jia-Wen; Wang, Han-Bing; Li, Jie; Ge, Wen-Wen

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收藏 | 浏览/下载：39/0 | 提交时间：2018/05/18

storage ring laser cooling longitudinal dynamics Schottky noise spectrum multi-particle simulation method

Numerical studies of shock wave interactions with a supersonic turbulent boundary layer in compression corner:Turning angle effects 期刊论文 OAI收割
COMPUTERS & FLUIDS, 2017, 卷号: 149, 页码: 56-69
作者: Tong FL(童福林); Yu ZP(于长平); Tang ZG(唐志共); Li XL(李新亮); Li, XL (reprint author), Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China.

收藏 | 浏览/下载：101/0 | 提交时间：2017/10/27

Compression Corner Low-frequency Oscillation Coherent Vortex Structure Power Spectrum Turbulent Kinetic Energy Budget Direct Numerical Simulation

Modification of source contribution in pals by simulation using geant4 code 期刊论文 iSwitch采集
Nuclear instruments & methods in physics research section b-beam interactions with materials and atoms, 2017, 卷号: 397, 页码: 75-81
作者: Ning, Xia; Cao, Xingzhong; Li, Chong; Li, Demin; Zhang, Peng

收藏 | 浏览/下载：114/0 | 提交时间：2019/04/23

Positron annihilation lifetime spectrum Geant4 simulation Kapton film Diffusion and reflection Source contribution

Benchmarking of JEFF-3.2, FENDL-3.0 and TENDL-2014 evaluated data for tungsten with 14.8 MeV neutrons 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2017, 卷号: 28, 页码: 6
作者: Zhang, Suyalatu; Nie, Yang-Bo; Ren, Jie; Luo, Fei; Ruan, Xi-Chao

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收藏 | 浏览/下载：30/0 | 提交时间：2018/05/31

Integral experiment D-T neutron source Time-of-flight technique Leakage neutron spectrum Monte Carlo simulation Evaluated nuclear data

A mesoscale approach for population balance modeling of bubble size distribution in bubble column reactors 会议论文 OAI收割
Brussels, BELGIUM, AUG, 2017
作者: Yang, Ning; Xiao, Qi

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收藏 | 浏览/下载：25/0 | 提交时间：2019/06/21

Bubble Size Distribution Cfd Simulation Population Balance Equation Break-up Mesoscale Numerical-simulation Coalescence Regime Transition Breakage Energy-spectrum Computational Fluid Dynamics Stability Condition 2-phase Flow Coalescence Drop Liquid

Modification of source contribution in PALS by simulation using Geant4 code 期刊论文 OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2017, 卷号: 397, 页码: 75-81
作者: Gong, YH; Wei, L; Wang, BY; Xia, R; Zhang, P

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收藏 | 浏览/下载：106/0 | 提交时间：2019/08/27

Positron annihilation lifetime spectrum Geant4 simulation Kapton film Diffusion and reflection Source contribution

Investigation of gas-solids flow characteristics in a circulating fluidized bed with annular combustion chamber by pressure measurements and CPFD simulation 期刊论文 OAI收割
CHEMICAL ENGINEERING SCIENCE, 2015, 卷号: 134, 页码: 433-447
作者: Qiu, Guizhi; Ye, Jiamin; Wang, Haigang

收藏 | 浏览/下载：174/0 | 提交时间：2015/10/27

Circulating fluidized bed Flow regimes Pressure CPFD simulation Non-uniformity Power spectrum