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Hybrid fluid–particle modeling of shock-driven hydrodynamic instabilities in a plasma

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Matter and Radiation at Extremes 2021年第3期6卷 24-32页

作者： hong-bo cai Xin-xin Yan Pei-lin Yao Shao-ping Zhu Institute of Applied Physics and Computational Mathematics Beijing 100094China Center for Applied Physics and Technology HEDPSand College of EngineeringPeking UniversityBeijing 100871China Center for Applied Physics and Technology HEDPSSchool of Physicsand College of EngineeringPeking UniversityBeijing 100871China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Graduate School China Academy of Engineering PhysicsP.O.Box 2101Beijing 100088China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterCAEP621900 MianyangChina

Shock-driven hydrodynamic instabilities in a plasma usually lead to interfacial mixing and the generation of electromagnetic fields,which are nonequilibrium processes coupling kinetics with meso-and macroscopic *** understanding and modeling of these physical processes are very challenging tasks for single-fluid hydrodynamic *** work presents a new framework that incorporates both kinetics and hydrodynamics to simulate shock waves and hydrodynamic instabilities in high-density *** this hybrid code,ions are modeled using the standard particle-in-cell method together with a Monte Carlo description of collisions while electrons are modeled as a massless fluid,with the electron heat flux and fluid–particle energy exchange being considered in the electron pressure *** high-density plasmas,Maxwell’s equations are solved using Ohm’s law instead of Ampere’s *** hybrid algorithm retains ion kinetic effects and their consequences for plasma interpenetration,shock wave propagation,and hydrodynamic ***,we investigate the shock-induced(or gravity-induced)turbulent mixing between a light and a heavy plasma,where hydrodynamic instabilities are initiated by a shock wave(or gravity).This study reveals that self-generated electromagnetic fields play a role in the formation of baroclinic vorticity along the interface and in late-time mixing of the *** results confirm the ability of the proposed method to describe shock-driven hydrodynamic instabilities in a plasma,in particular,nonequilibrium processes that involve mixing and electromagnetic fields at the interface.

关键词： hydrodynamic shock mixing

NUV Star Catalog from the Lunar-based Ultraviolet Telescope Survey: First Release

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Research in Astronomy and Astrophysics 2016年第11期16卷 29-36页

作者： Xian-Min Meng Xu-Hui Han Jian-Yan Wei Jing Wang Li Cao Yu-Lei Qiu Chao Wu Jin-Song Deng hong-bo cai Li-Ping Xin Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences

We present a star catalog extracted from the Lunar-based Ultraviolet Telescope （LUT） survey program. LUT＇s observable sky area is a circular belt around the Moon＇s north pole, and the survey program covers a preferred area of about 2400 deg2 which includes a region of the Galactic plane. The data are processed with an automatic pipeline which copes with stray light contamination, artificial sources, cosmic rays, flat field calibration, photometry and so on. In the first release version, the catalog provides high confidence sources which have been cross-identified with the Tycho-2 catalog. All the sources have signalto-noise ratio larger than 5, and the corresponding magnitude limit is typically 14.4 mag, but can be as deep as -16 mag if stray light contamination is at the lowest level. A total of 86 467 stars are recorded in the catalog. The full catalog in electronic form is available online.

关键词： Astronomical Databases: surveys -- Astronomical Databases: catalogs -- techniques: imageprocessing -- techniques: photometric -- ultraviolet: stars

Review of the current status of fast ignition research atthe IAPCM

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High Power Laser Science and Engineering 2014年第1期2卷 4-12页

作者： hong-bo cai Si-zhong Wu Jun-feng Wu Mo Chen Hua Zhang Min-qing He Li-hua Cao Cang-tao Zhou Shao-ping Zhu Xian-tu He Institute of Applied Physics and Computational Mathematics Center for Applied Physics and Technology Peking University

We review the present status and future prospects of fast ignition(FI) research of the theoretical group at the IAPCM(Institute of Applied Physics and Computational Mathematics, Beijing) as a part of the inertial confinement fusion project. Since the approval of the FI project at the IAPCM, we have devoted our efforts to improving the integrated codes for FI and designing advanced targets together with the experimental group. Recent FI experiments [K. U. Akli et al., Phys. Rev. E 86, 065402(2012)] showed that the petawatt laser beam energy was not efficiently converted into the compressed core because of the beam divergence of relativistic electron beams. The coupling efficiency can be improved in three ways:(1) using a cone–wire-in-shell advanced target to enhance the transport efficiency,(2) using external magnetic fields to collimate fast electrons, and(3) reducing the prepulse level of the petawatt laser beam. The integrated codes for FI, named ICFI, including a radiation hydrodynamic code, a particle-in-cell(PIC) simulation code,and a hybrid fluid–PIC code, have been developed to design this advanced target at the IAPCM. The Shenguang-II upgraded laser facility has been constructed for FI research; it consists of eight beams(in total 24 kJ/3ω, 3 ns) for implosion compression, and a heating laser beam(0.5–1 kJ, 3–5 ps) for generating the relativistic electron beam. A fully integrated FI experiment is scheduled for the 2014 project.

关键词： fast ignition integrated simulation codes

Clinical experience of Professor Xie Jingri in the deficiency-cold of spleen and stomach type of complex peptic ulcer

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Journal of Hainan Medical University 2022年第2期28卷 60-64页

作者： hong-bo cai Hai-Qiang Wang hong-Yu cai Hao-Lin Li Guo-Ying Liang The First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine Harbin 1500402China Harbin hospital of traditional Chinese medicine Harbin 150040China Changchun University of science and technology Changchun 130600China

Objective:To summarize Professor Xie's clinical experience in treating the deficiency cold of spleen and stomach type of complex peptic ***:through the observation of the curative effect of the patients with the deficiency cold of spleen and stomach type of complex peptic ulcer in the outpatient department of liver,spleen and stomach department of our hospital,the dialectical application and clinical experience of Professor Xie Jingri's self-made prescription in clinical practice were ***:Professor Xie Jingri's self-made prescription can effectively improve the clinical symptoms of patients with the deficiency cold of spleen and stomach type of complex peptic ulcer,and through individual syndrome differentiation and treatment,make the self-made prescription vary from person to person,clinical addition and subtraction,so as to further improve the clinical efficacy of ***:Professor Xie Jingri's self-made prescription is effective in treating complex peptic ulcer of spleen stomach deficiency cold type,which is worthy of further clinical application and promotion.

关键词： Complex peptic ulcer Deficiency cold of spleen and stomach Professor Xie Jingri Clinical experience

A demonstration of extracting the strength and wavelength of the magnetic field generated by the Weibel instability from proton radiography

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High Power Laser Science and Engineering 2019年第3期7卷 37-44页

作者： Bao Du hong-bo cai Wen-Shuai Zhang Shi-Yang Zou Jing Chen Shao-Ping Zhu Institute of Applied Physics and Computational Mathematics Beijing 100094China HEDPS Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China STPPL Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900China Graduate School China Academy of Engineering PhysicsBeijing 100088China

The Weibel instability and the induced magnetic field are of great importance for both astrophysics and inertial confinement *** of the stochasticity of this magnetic field,its main wavelength and mean strength,which are key characteristics of the Weibel instability,are still unobtainable *** this paper,a theoretical model based on the autocorrelation tensor shows that in proton radiography of the Weibel-instability-induced magnetic field,the proton flux density on the detection plane can be related to the energy spectrum of the magnetic *** allows us to extract the main wavelength and mean strength of the two-dimensionally isotropic and stochastic magnetic field directly from proton radiography for the first *** calculations are conducted to verify our theory and show good consistency between pre-set values and the results extracted from proton radiography.

关键词： magnetic field plasma diagnostics proton radiography Weibel instability

Photometric Calibration of the Lunar-based Ultraviolet Telescope for Its First Six Months of Operation on the Lunar Surface

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Research in Astronomy and Astrophysics 2015年第7期15卷 1068-1076页

作者： Jing Wang Li Cao Xian-Min Meng hong-bo cai Jing-Song Deng Xu-Hui Han Yu-Lei Qiu Fang Wang Shen Wang Wei-Bin Wen Chao Wu Jian-Yan Wei Jing-Yao Hu National Astronomical Observatories Chinese Academy of Sciences Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of Sciences Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of Sciences

We describe the photometric calibration of the Lunar-based Ultraviolet Telescope（LUT）, the first robotic astronomical telescope working on the lunar surface, for its first six months of operation on the lunar surface. Two spectral datasets（set A and B） from near-ultraviolet（NUV） to the optical band were constructed with 44 International Ultraviolet Explorer（IUE） standards, because of the LUT＇s relatively wide wavelength coverage. Set A was obtained by extrapolating the IUE NUV spectra（λ 〈 3200 ） to the optical band based upon the theoretical spectra of stellar atmosphere models. Set B was composed of theoretical spectra from 2000  to 8000 extracted from the same model grid. In total, seven standards have been observed in15 observational runs until May 2014. The calibration results show that the photometric performance of LUT is highly stable in its first six months of operation. The magnitude zero points obtained from the two spectral datasets are also consistent with each other, i.e., zp = 17.54 ± 0.09 mag（set A） and zp = 17.52 ± 0.07 mag（set B）.

关键词： space vehicles: instruments -- telescopes -- techniques: photometric --ultraviolet: general

Separating the contributions of electric and magnetic fields in deflecting the probes in proton radiography with multiple proton energies

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Matter and Radiation at Extremes 2021年第3期6卷 42-54页

作者： Bao Du hong-bo cai Wen-Shuai Zhang Xiao-Fang Wang Dong-Guo Kang Luan Deng En-Hao Zhang Pei-Lin Yao Xin-Xin Yan Shi-Yang Zou Shao-Ping Zhu Institute of Applied Physics and Computational Mathematics Beijing 100094China HEDPS Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China Graduate School China Academy of Engineering PhysicsBeijing 100088China Department of Engineering Physics Tsinghua UniversityBeijing 100084China STPPL Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900China

In proton radiography,degeneracy of electric and magnetic fields in deflecting the probe protons can prevent full interpretation of proton flux perturbations in the detection *** this paper,theoretical analyses and numerical simulations suggest that the contributions of the electric and magnetic fields can be separately obtained by analyzing the difference between the flux distributions of two discriminated proton energies in a single shot of proton *** eliminate the influence of field evolution on the separation,a strategy is proposed in which slow field evolution is assumed or an approximate estimate of field growth is *** could help achieve a clearer understanding of the radiographic process and allow further quantitative analysis.

关键词： magnetic fields assumed

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含脲基片段不对称方酰胺、异方酰胺的合成

四川大学学报（自然科学版） 2001年第4期38卷 532-539页

作者：李鸿波李聚才陈益钊四川大学化学学院成都610064

以氨甲酰类氮氧方酸 1和 (N 脂肪基 )氮氧方酸正丁酯 4为原料 ,分别与芳伯胺和脲类化合物反应 ,实现了不对称取代的方酰胺 6a～ 6l,7a～ 7c和异方酰胺 3a～ 3s的合成 ,共得 34个新化合物。

关键词：氨甲酰类氮氧方酸 (N-脂肪基)氮氧方酸正丁酯芳伯胺脲方酰胺异方酰胺脲基片段合成

The mini-GWAC optical follow-up of gravitational wave alerts – results from the O2 campaign and prospects for the upcoming O3 run

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Research in Astronomy and Astrophysics 2020年第1期20卷 107-123页

作者： Damien Turpin Chao Wu Xu-Hui Han Li-Ping Xin Sarah Antier Nicolas Leroy Li Cao hong-bo cai Bertrand Cordier Jin-Song Deng Wen-Long Dong Qi-Chen Feng Lei Huang Lei Jia Alain Klotz Cyril Lachaud Hua-Li Li En-Wei Liang Shun-Fang Liu Xiao-Meng Lu Xian-Min Meng Yu-Lei Qiu Hui-Juan Wang Jing Wang Shen Wang Xiang-Gao Wang Jian-Yan Wei bo-Bing Wu Yu-Jie Xiao Da-Wei Xu Yang Xu Yuan-Gui Yang Pin-Pin Zhang Ruo-Song Zhang Shuang-Nan Zhang Ya-Tong ZhengandSi-Cheng Zou Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China LAL Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayF-91898 OrsayFrance APC Univ Paris DiderotCNRS/IN2P3CEA/lrfuObs de ParisSorbonne Paris CiteFrance CEA Saclay DRF/IRFU/Departement d’astrophysique91191 Gif-sur-YvetteFrance School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China Universite de Toulouse IRAP 14 Av.Edouard BelinF-31000 ToulouseFrance Institut de Recherche en Astrophysique et Planetologie(IRAP) UPS-OMPToulouseFrance Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000China

The second(O2)observational campaign of gravitational waves(GWs)organized by the LIGO/Virgo Collaborations has led to several breakthroughs such as the detection of GW signals from merger systems involving black holes or neutrons *** O2,14 GW alerts were sent to the astronomical community with sky regions mostly covering over hundreds of square *** them,six were finally confirmed as real astrophysical *** 2013,a new set of ground-based robotic telescopes called Ground-based Wide Angle Camera system(GWAC)project and its pathfinder mini-GWAC has been developed to contribute to the various challenges of multi-messenger and time domain *** GWAC system is built up in the framework of the ground-segment system of the SVOM mission that will be devoted to the study of the multi-wavelength transient sky in the next *** O2,only the mini-GWAC telescope network was fully *** to the wide field of view and fast automatic follow-up capabilities of the mini-GWAC telescopes,they were adept to efficiently cover the sky localization areas of GW event *** this paper,we present the mini-GWAC pipeline we have set up to respond to GW alerts and we report our optical follow-up observations of eight GW alerts detected during the O2 *** observations provided the largest coverage of the GW localization areas with a short latency made by any optical *** found tens of optical transient candidates in our images,but none of those could be securely associated with any confirmed black hole-black hole merger *** on this first experience and the near future technical improvements of our network system,we will be more competitive in detecting the optical counterparts from some GW events that will be identified during the upcoming O3 run,especially those emerging from binary neutron star mergers.

关键词： gravitational waves methods:data analysis methods:observational (stars:)gammaray burst:general