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| 1 | High-resolution X-ray flash radiography of Ti characteristic lines with multilayer Kirkpatrick–Baez microscope at the Shenguang-ⅡUpdate laser facility显示文摘High-resolution X-ray flash radiography of Ti characteristic lines with a multilayer Kirkpatrick-Baez microscope was developed on the Shenguang-Ⅱ(SG-Ⅱ)Update laser facility.The microscope uses an optimized multilayer design of Co/C and W/C stacks to obtain a high reflection efficiency of the Ti characteristic lines while meeting the precise alignment requirement at the Cu Kα line.The alignment method based on dual simulated balls was proposed herein,which simultaneously realizes an accurate indication of the center field of view and the backlighter position.The optical design,multilayer coatings,and alignment method of the microscope and the experimental result of Ti flash radiography of the Au-coned CH shell target on the SG-Ⅱ Update are described. | Shengzhen Yi Feng Zhang Qiushi Huang Lai Wei Yuqiu Gu Zhanshan Wang | 2021 | High Power Laser Science and Engineering2021，9，3： | 3 |
| 2 | Proton radiography of magnetic fields generated with an open-ended coil driven by high power laser pulses显示文摘Recently generation of strong magnetic(B)fields has been demonstrated in capacitor coils heated by high power laser pulses[S.Fujioka et al.,Sci.Rep.3,1170(2013)].This paper will present a direct measurement of B field generated with an open-ended coil target driven by a nanosecond laser pulse using ultrafast proton radiography.The radiographs are analyzed with particle-tracing simulations.The B field at the coil center is inferred to be ~50 T at an irradiance of ~5×10^(14) W·cm^(-2).The B field generation is attributed to the background cold electron flow pointing to the laser focal spot,where a target potential is induced due to the escape of energetic electrons. | Guoqian Liao Yutong Li Baojun Zhu Yanfei Li Fang Li Mengchao Li Xuan Wang Zhe Zhang Shukai He Weiwu Wang Feng Lu Faqiang Zhang Lei Yang Kainan Zhou Na Xie Wei Hong Yuqiu Gu Zongqing Zhao Baohan Zhang Jie Zhang | 2016 | Matter and Radiation at Extremes2016，1，4： | 1 |
| 3 | Distribution and environmental impact factors of picophytoplankton in the East China Sea during spring显示文摘Marine picophytoplankton(Pico)as a major contributor to primary productivity in oligotrophic waters,play a very important role in marine material cycle and energy conversion,and their key role in the carbon cycle and global climate change is increasingly emphasized.To study the factors aff ecting the dynamic distribution of Synechococcus,Prochlorococcus,and picoeukaryotes in the East China Sea(ECS),a marginal sea of the Northwest Pacific,we investigated 27 stations in May 2017,and collected 148 samples of Pico and nutrients from the surface to the bottom.By means of flow cytometry,the abundance of Pico was measured,and then we estimated the carbon biomass and analyzed the distribution of Pico.Finally,combined with the ECS unique geographical situation and hydrological regime,we evaluated various factors aff ecting the Pico in the ECS.In Pico community,the picoeukaryotes cell abundance was between 0.49×10^(2)-1.44×10^(4) cells/mL.Prochlorococcus ranged from 1.36×10^(3)-3.47×10^(4) cells/mL and Synechococcus ranged from 0.69×10^(3)-1.15×105 cells/mL.Synechococcus was the most,both in abundance and in carbon biomass.Picoeukaryotes were the least in abundance,but has larger contribution to carbon biomass than Prochlorococcus.Water temperature,salinity,and stability of water column influenced Pico distribution.Picoeukaryotes were abundant in the shelf sea,whereas Synechococcus and Prochlorococcus were detected in the northeast of Taiwan,China.This study provided basic information for the study of Pico communities in the ECS and its adjacent marine ecosystem. | Feng WANG Yuqiu WEI Jiaqi YUE Congcong GUO Jun SUN | 2021 | Journal of Oceanology and Limnology2021，39，4： | 1 |
| 4 | Mechanism of C_(4)AF Content and Heat-curing Process on the Abrasion Resistance of High Ferrite Cement显示文摘Cement used in severe maritime environments must be attached with exceptional properties such as high sulfate resistance and abrasion strength.A sulfate resistant material typically used in marine engineering is high ferrite cement,which has been utilized in sulfate-rich environments.This study aims at exploring the effect of C_(4)AF and heat-curing on the abrasion resistance of high ferrite cement(HFC,C_(4)AF:14%-22%)in order to have a comprehensive understanding of this mechanism and promote the application of HFC in marine engineering.A new invention was designed for the abrasion resistance device by considering the sea-wave abrasion and seawater erosion in laboratory.The compressive strength and abrasion resistance of HFC were measured.Additionally,advanced analytical methods were used to explore the abrasion resistance mechanism of HFC,including X-ray fluorescence(XRF),X-ray diffraction(XRD),and thermogravimetric(TG)analyses,as well as mercury intrusion porosimetry(MIP).The results showed that HFC had the best abrasion resistance under appropriate heat-curing system that the curing temperature was 50℃and the hosting time was 4 hours,compared with PI(Portland cement)and LHC(low heat cement),meanwhile the abrasion resistance of HFC had a 62.4%increase when C_(4)AF content is increased from 14%to 22%.It can be ascribed that the content of portlandite is decreased due to the increase of C_(4)AF,which can reduce the portlandite assembled in ITZ(interfacial transition zone).It can also be ascribed that the DEF(delayed ettringite formation)is successfully avoided in HFC and the hydration degree of HFC can continue to be boosted under appropriate heat-curing system. | 邓青山 FENG Yuqiu ZENG Lang WANG Shuaike WEI Shaoshan 饶美娟 | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，3： | 0 |
| 5 | Diagnosis of indirectly driven double shell targets with point-projection hard x-ray radiography显示文摘We present an application of short-pulse laser-generated hard x rays for the diagnosis of indirectly driven double shell targets. Coneinserted double shell targets were imploded through an indirect drive approach on the upgraded SG-II laser facility. Then, based on thepoint-projection hard x-ray radiography technique, time-resolved radiography of the double shell targets, including that of their near-peakcompression, were obtained. The backlighter source was created by the interactions of a high-intensity short pulsed laser with a metalmicrowire target. Images of the target near peak compression were obtained with an Au microwire. In addition, radiation hydrodynamicsimulations were performed, and the target evolution obtained agrees well with the experimental results. Using the radiographic images, arealdensities of the targets were evaluated. | Chao Tian Minghai Yu Lianqiang Shan Fengjuan Wu Bi Bi Qiangqiang Zhang Yuchi Wu Tiankui Zhang Feng Zhang Dongxiao Liu Weiwu Wang Zongqiang Yuan Siqian Yang Lei Yang Zhigang Deng Jian Teng Weimin Zhou Zongqing Zhao Yuqiu Gu Baohan Zhang | 2024 | Matter and Radiation at Extremes2024，9，2： | 0 |
| 6 | Commissioning experiment of the high-contrast SILEX-Ⅱ multi-petawatt laser facility显示文摘The results of a commissioning experiment on the SILEX-Ⅱlaser facility(formerly known as CAEP-PW)are reported.SILEX-Ⅱis a complete optical parametric chirped-pulse amplification laser facility.The peak power reached about 1 PWin a 30 fs pulse duration during the experiment.The laser contrast was better than 1010 at 20 ps ahead of the main pulse.In the basic laser foil target interaction,a set of experimental data were collected,including spatially resolved x-ray emission,the image of the coherent transition radiation,the harmonic spectra in the direction of reflection,the energy spectra and beam profile of accelerated protons,hot-electron spectra,and transmitted laser energy fraction and spatial distribution.The experimental results show that the laser intensity reached 531020 W/cm^(2) within a 5.8μm focus(FWHM).Significant laser transmission did not occur when the thickness of theCHfoil was equal to or greater than 50 nm.The maximum energy of the accelerated protons in the target normal direction was roughly unchanged when the target thickness varied between 50 nm and 15μm.The maximum proton energy via the target normal sheath field acceleration mechanism was about 21 MeV.We expect the on-target laser intensity to reach 10^(22) W/cm^(2) in the near future,after optimization of the laser focus and upgrade of the laser power to 3 PW. | Wei Hong Shukai He Jian Teng Zhigang Deng Zhimeng Zhang Feng Lu Bo Zhang Bin Zhu Zenghai Dai Bo Cui Yuchi Wu Dongxiao Liu Wei Qi Jinlong Jiao Faqiang Zhang Zuhua Yang Feng Zhang Bi Bi Xiaoming Zeng Kainan Zhou Yanlei Zuo Xiaojun Huang Na Xie Yi Guo Jingqin Su Dan Han Ying Mao Leifeng Cao Weimin Zhou Yuqiu Gu Feng Jing Baohan Zhang Hongbo Cai Minqing He Wudi Zheng Shaoping Zhu Wenjun Ma Dahui Wang Yinren Shou Xueqing Yan Bin Qiao Yi Zhang Congling Zhong Xiaohui Yuan and Wenqing Wei | 2021 | Matter and Radiation at Extremes2021，6，6： | 0 |
| 7 | Long-Term Preservation of Electronic Record Based on Digital Continuity in Smart Cities显示文摘Under the co-promotion of the wave of urbanization and the rise of data science,smart cities have become the new concept and new practice of urban development.Smart cities are the combination of information technology represented by the Internet of Things,cloud computing,mobile networks and big data,and urbanization.How to effectively achieve the long-term preservation of massive,heterogeneous,and multi-source digital electronic records in smart cities is a key issue thatmust be solved.Digital continuity can ensure the accessibility,integrity and availability of information.The quality management of electronic record,like the quality management of product,will run through every phase of the urban lifecycle.Based on data quality management,this paper constructs digital continuity of smart city electronic records.Furthermore,thework in this paper ensures the authenticity,integrity,availability and timeliness of electronic documents by quality management of electronic record.This paper elaborates on the overall technical architecture of electronic record,as well as the various technical means needed to protect its four characteristics. | Yongjun Ren Kui Zhu Yuqiu Gao Jinyue Xia Shi Zhou Ruiguo Hu Xiujuan Feng | 2021 | Computers, Materials & Continua2021，，3： | 0 |
| 8 | A new method on diagnostics of muons produced by a short pulse laser显示文摘Muons produced by a short pulse laser can serve as a new type of muon source having potential advantages of high intensity, small source emittance, short pulse duration and low cost. To validate it in experiments, a suitable muon diagnostics system is needed since high muon flux generated by a short pulse laser shot is always accompanied by high radiation background, which is quite different from cases in general muon researches. A detection system is proposed to distinguish muon signals from radiation background by measuring the muon lifetime. It is based on the scintillator detector with water and lead shields, in which water is used to adjust energies of muons stopped in the scintillator and lead to against radiation background. A Geant 4 simulation on the performance of the detection system shows that efficiency up to 52% could be arrived for low-energy muons around 200 MeV and this efficiency decreases to 14% for high-energy muons above 1000 MeV. The simulation also shows that the muon lifetime can be derived properly by measuring attenuation of the scintilla light of electrons from muon decays inside the scintillator detector. | Feng Zhang Boyuan Li Lianqiang Shan Bo Zhang Wei Hong Yuqiu Gu | 2017 | High Power Laser Science and Engineering2017，5，3： | 0 |
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