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| 1 | A digitalizing board for the prototype array of LHAASO WCDA显示文摘In this paper,a digitalizing board for readout of PMT signals in the prototype array of WCDA(water Cerenkov detector array)for LHAASO(Large high altitude air shower observatory)is designed.The prototype array is composed of 9 PMTs,including the pulse time and charge measurement from the PMTs,and clock generation and trigger decision.In the digitalizing board,FPGA reconfiguration and data readout via VME bus are implemented.Test results show that the performances meet well with the requirements of readout electronics.It has been installed in Yangbajing and tests with the prototype array and DAQ is ongoing. | HAO Xinjun LIU Shubin ZHAO Lei AN Qi | 2011 | Nuclear Science and Techniques2011，22，3： | 4 |
| 2 | Mars Orbiter magnetometer of China’s First Mars Mission Tianwen-1显示文摘As one of the seven scientific payloads on board the Tianwen-1 orbiter,the Mars Orbiter Magnetometer(MOMAG)will measure the magnetic fields of and surrounding Mars to study its space environment and the interaction with the solar wind.The instrument consists of two identical triaxial fluxgate magnetometer sensors,mounted on a 3.19 meter-long boom with a seperation of about 90 cm.The dual-magnetometers configuration will help eliminate the magnetic field interference generated by the spacecraft platform and payloads.The sensors are controlled by an electric box mounted inside the orbiter.Each magnetometer measures the ambient vector magnetic field over a wide dynamic range(to 10,000 nT per axis)with a resolution of 1.19 pT.Both magnetometers sample the ambient magnetic field at an intrinsic frequency of 128 Hz,but will operate in a model with alternating frequency between 1 and 32 Hz to meet telemetry allocations. | Kai Liu XinJun Hao YiRen Li TieLong Zhang ZongHao Pan ManMing Chen XiaoWen Hu Xin Li ChengLong Shen YuMing Wang | 2020 | Earth and Planetary Physics2020，4，4： | 2 |
| 3 | A low-energy ion spectrometer with half-space entrance for three-axis stabilized spacecraft显示文摘A low-energy ion spectrometer(LEIS) for use aboard three-axis stabilized spacecraft has been developed to measure ion energy per charge distribution in three-dimensional space with good energy-, angular-and temporal-resolutions. For the standard top-hat electrostatic analyzer used widely in space plasma detection, three-axis stabilized spacecraft makes it difficult to obtain complete coverage of all possible ion arrival directions. We have designed angular scanning deflectors supplementing to a cylindrically symmetric top-hat electrostatic analyzer to provide a half-space field of view as 360°×90°(–45°–+45°), and fabricated the LEIS flight model for detecting magnetospheric ions in geosynchronous orbit. The performance of this payload has been evaluated in detail by a series of simulation and environmental tests, and the payload has also been calibrated through laboratory experiments using a low-energy ion source. The results show that capabilities of the LEIS payload are in accordance with the requirements of a magnetospheric mission. | HU RenXiang SHAN Xu YUAN GuangYuan WANG ShuWen ZHANG WeiHang QI Wei CAO Zhe LI YiRen CHEN ManMing YANG XiaoPing WANG Bo SHAO SiPei LI Feng ZHONG XiaoQing FAN Dan HAO XinJun FENG ChangQing SU ZhenPeng SHEN ChengLong LI Xin DAI GuYue QIU BingLin PAN ZongHao LIU Kai XU ChunKai LIU ShuBin AN Qi ZHANG TieLong WANG YuMing CHEN XiangJun | 2019 | Science China(Technological Sciences)2019，62，6： | 1 |
| 4 | First results of the low energy ion spectrometer onboard a Chinese geosynchronous satellite显示文摘A Chinese geosynchronous satellite was launched on June 23,2020.It carried a plasma detection package to monitor the space environment around the orbit.Here we report the inflight performance of a low energy ion spectrometer(LEIS),one of the primary instruments in the plasma detection package,and its initial observations in flight.Benefiting from the state-of-the-art design of a top-hat electrostatic analyzer cooperated with angular scanning deflectors,three-dimensional measurement of ions in space with a large field of view of 360°×90°and a wide energy range from 50 eV to 25 keV per charge has been achieved.The differential energy flux spectra of ions around the orbit have shown clear signatures of surface charging and storm/substorm ion injections.The occurrence of surface charging could be caused by the lack of photoemission at the Earth's eclipse(near the midnight)or the storm energetic electron injection at the dawn sector.The present results demonstrated a good performance of the LEIS payload in flight for monitoring the space ion environment around the orbit.In situ measurements of the LEIS payload provide us an opportunity to understand the magnetospheric ion dynamics and forecast the associate space weather impacts. | SHAN Xu MIAO Bin CAO Zhe SUN ZhenYu LI YiRen LIU Kai GUO XingYu QU SanBiao SU ZhenPeng SHEN ChengLong PAN ZongHao LI Xin HAO XinJun YANG XiaoPing TIAN Chao JIANG Yu LIU ShuBin AN Qi CHEN XiangJun WANG YuMing | 2023 | Science China(Technological Sciences)2023，66，5： | 0 |
| 5 | In-flight calibration of the magnetometer on the Mars orbiter of Tianwen-1显示文摘Mars orbiter magnetometer(MOMAG)is one of seven science payloads onboard Tianwen-1’s orbiter.Unlike most of the satellites,Tianwen-1’s orbiter is not magnetically cleaned,and the boom where placed the magnetometer’s sensors is not long enough.These pose many challenges to the magnetic field data processing.In this study,we introduce the in-flight calibration process of the Tianwen-1/MOMAG.The magnetic interference including spacecraft generated dynamic field and the slowlychanging zero offsets are cleaned in sequence.Then the calibrated magnetic field data are compared with the data from the Mars atmosphere and volatile Evolutio N(MAVEN).We find that some physical structures in the solar wind are consistent between the two data sets,and the distributions of the magnetic field strength in the solar wind are very similar.These results suggest that the in-flight calibration of the MOMAG is successful and the MOMAG provides reliable data for scientific research. | ZOU ZhuXuan WANG YuMing ZHANG TieLong WANG GuoQiang XIAO SuDong PAN ZongHao ZHANG ZhouBin YAN Wei DU Yang CHI YuTian CHENG Long WU ZhiYong HAO XinJun LI YiRen LIU Kai CHEN ManMing SU ZhenPeng SHEN ChengLong XU MengJiao GUO JingNan | 2023 | Science China(Technological Sciences)2023，66，8： | 0 |
| 6 | 3D velocity field reconstruction of gas-liquid two-phase flow based on space-time multi-scale binocular-PIV technology显示文摘For particle image velocimetry(PIV) technique, the two-dimensional(2D) PIV by one camera can only obtain 2D velocity field, while three-dimensional(3D) PIV based on tomography by three or four cameras is always complex and expensive. In this work, a binocular-PIV technology based on two cameras was proposed to reconstruct the 3D velocity field of gas-liquid two-phase flow, which is a combination of the binocular stereo vision and cross-correlation based on fast Fourier transform(CC-FFT). The depth of particle was calculated by binocular stereo vision on space scale, and the plane displacement of particles was acquired by CC-FFT on time scale. Experimental results have proved the effectiveness of the proposed method in 3D reconstruction of velocity field for gas-liquid two-phase flow. | WANG Hongyi DOU Gongcheng ZHANG Hao ZHU Xinjun SONG Limei | 2022 | Optoelectronics Letters2022，18，10： | 0 |
| 7 | Progress of HIRFL-CSR Vacuum System显示文摘In 2004, the great progress was obtained in HIRFL-CSR vacuum system. The vacuum chambers of the last part of CSRm injection beam line were installed in site, all beam diagnostic devices in the beam line were inserted in the appropriate chambers, the bake-out jackets were put on the chambers and the installation of the bake-out control system was finished, the bake-out for the beam line | Yang Xiaotian, Zhang Junhui, Meng Jun, Zhang Xiping, Hou Shengjun Hu Zhenjun, Zhang Xinjun, Wu Huimin and Hao Bingan | 2004 | 近代物理研究所和兰州重离子加速器实验室年报:英文版2004，，1： | 0 |
| 8 | Ground calibration of the Mars orbiter magnetometer onboard Tianwen-1显示文摘Ground calibration experiments of the Mars orbiter magnetometer(MOMAG)onboard the orbiter of Tianwen-1 were performed to determine the sensitivity,misalignment angle,and offset of the sensors.The linearity of the applied calibrated magnetic fields and the output from the sensors were confirmed to be better than 10^(-4),and the sensor axes were orthogonal to each other within 0.5 degrees.The temperature dependencies of the sensitivity and misalignment angle were examined,but no clear signatures of temperature dependencies could be seen.Sensor offset and the stability of sensor offset drift with a temperature change were also determined by the rotation method.The stability of the sensor offset drift was less than 0.01 nT/℃.The ground calibration of MOMAG determines all the calibration parameters of the sensors for accurate magnetic field measurements in orbit with the appropriate corrections. | ManMing Chen Kai Liu XiaoWen Hu YiRen Li XinJun Hao ZongHao Pan | 2023 | Earth and Planetary Physics2023，7，3： | 0 |
| 9 | The Mars orbiter magnetometer of Tianwen-1:in-flight performance and first science results显示文摘The Mars Orbiter MAGnetometer(MOMAG)is a scientific instrument onboard the orbiter of China’s first mission for Mars—Tianwen-1.Since November 13,2021,it has been recording magnetic field data from the solar wind to the magnetic pile-up region surrounding Mars.Here we present its in-flight performance and first science results,based on its first one and one-half months’data.Comparing these early MOMAG observations to the magnetic field data in the solar wind from NASA’s Mars Atmosphere and Volatile EvolutioN(MAVEN)mission,we report that the MOMAG magnetic field data are at the same level in magnitude,and describe the same magnetic structures with similar variations in three components.We recognize 158 clear bow shock(BS)crossings in these MOMAG data;their locations match well statistically with the modeled average BS.We also identify and compare five pairs of datasets collected when Tianwen-1’s orbiter and the MAVEN probe made simultaneous BS crossings.These BS crossings confirm the global shape of modeled BS,as well as the south-north asymmetry of the Martian BS.Two cases presented in this paper suggest that the BS is probably more dynamic at flank than near the nose.So far,MOMAG performs well,and provides accurate magnetic field vectors.MOMAG is continuously scanning the magnetic field surrounding Mars.Data from MOMAG’s measurements complement data from MAVEN and will undoubt edly advance our understanding of the plasma environment of Mars. | YuMing Wang TieLong Zhang GuoQiang Wang SuDong Xiao ZhuXuan Zou Long Cheng ZongHao Pan Kai Liu XinJun Hao YiRen Li ManMing Chen ZhouBin Zhang Wei Yan ZhenPeng Su ZhiYong Wu ChengLong Shen YuTian Chi MengJiao Xu JingNan Guo Yang Du | 2023 | Earth and Planetary Physics2023，7，2： | 0 |
| 10 | Progress of HIRFL-CSR Vacuum System显示文摘In 2005, the installation of whole vacuum system of HIRFL-CSR was finished and the ideal pressures have been obtained. During the beam commissioning, the vacuum system of CSRm's injection beam line keeps a good condition in most of the cases. But at one time, the beam bumped against a glass view window in a 60°dipole chamber which was designed for alignment (Fig. 1). The fast valve closed when the pressure rose. Then | Yang Xiaotian,Zhang Junhui, Meng Jun, Zhang Xiping, Hou Shengjun, Hu Zhenjun Guo Dizhou, Zhang Xinjun, Wu Huimin and Hao Bingan | 2005 | 近代物理研究所和兰州重离子加速器实验室年报:英文版2005，，1： | 0 |
| 11 | Gradient defects mediate negative thermal quenching in phosphors显示文摘Luminescent materials often suffer from thermal quenching(TQ),limiting the continuation of their applications under high temperatures up to 473 K.The formation of defect levels could suppress TQ,but rational synthesis and deep understanding of multiple defects-regulated luminescent materials working in such a wide temperature range still remain challenging.Here,we prepare a negative thermal quenching(NTQ)phosphor LiTaO_(3)∶Tb^(3+)by introducing gradient defects V_(Ta)^(5−),Tb_(Li)^(2+),and(V_(Ta)Tb_(Li))^(3−)as identified by advanced experimental and theoretical studies.Its photoluminescence significantly becomes intense with rising temperatures and then slowly increases at 373 to 473 K.The mechanism studies reveal that gradient defects with varied trapping depths could act as energy buffer layers to effectively capture the carriers.Under thermal disturbance,the stored carriers could successively migrate to the activators in consecutive and wide temperature zones,compensating for TQ to enhance luminescence emission.This study initiates the synthesis of multi-defect NTQ phosphors for temperature-dependent applications. | Mingxue Deng Xingzhong Cao Yangmin Tang Zhenzhen Zhou Lijia Liu Xiaofeng Liu Peng Zhang Lo-Yueh Chang Hao Ruan Xinjun Guo Jiacheng Wang Qian Liu | 2023 | Advanced Photonics2023，5，2： | 0 |
| 12 | Progress of HIRFL-CSR Vacuum System显示文摘The HIRFL-CSR vacuum system progressed steadily during the past year. The 2/3rd of CSR, injection beam line (SSC-CSR, m)'s vacuum chambers were installed in site in Jan. 2003 (Fig.l). The beam diagnostic devices were inserted in the chambers as well. The pressures in unbaked section were kept in 1~5×10^-7 Pa range and in baked section were 2~5×10^-9 Pa. | Yang Xiaotian, Zhang Junhui, Mcng Jun, Zhang Xinjun, Zhang Xiping, Hou Shengjun Hu Zhenjun, Niu Zhiwei, Hao Bingan and Wu Huimin | 2003 | 近代物理研究所和兰州重离子加速器实验室年报:英文版2003，，1： | 0 |
| 13 | Progress of UHV System of HIRFL-CSR in 2001显示文摘The great progress of the ultra-high vacuum system of HIRFL-CSR was obtained in 2001.1. Many testing cycles were done on the first dipole chamber prototype with different baking temperatures.250℃ was considered a suitable baking temperature for the vacuum chambers,which can reduce the outgassing rate of the chambers effectively and was not high enough to damage the magnet coils during the bake-out process.At the same time, the residual gas analyzers and vacuum gauges from several companies were tested. ... | Yang Xiaotian, Zhang Junhui, Zhang Xinjun, Wu Huimin, Hao Bingan, Meng Jun Zhang Xiping, Hou Shengjun, Hu Zhenjun and Niu Zhiwei | 2001 | IMP & HIRFL Annual Report2001，，1： | 0 |
| 14 | Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells显示文摘In this work,regio-regular and random polymers(reg-PTF and ran-PTF)comprising benzodithiophene and 3-fluorothiophene units are developed to investigate the influence of polymer chain regularity on the photovoltaic performance.Interestingly,reg-PTF exhibits higher HOMO energy level(∼0.2 eV)than that of ran-PTF due to the more ordered molecular structure and higher crystallization.As the result,the HOMO energy level offset between donor and acceptor can be well controlled by selecting different acceptors.Using BTP-ec9-4F with a much deep HOMO energy level as acceptor,reg-PTF-based devices display an inferior PCE of 7.66%compared with ran-PTF based ones(11.78%)due to the too large HOMO energy levels offset.When blending with Y18-1F,the PCE of reg-PTF-based devices is increased to 13.23%due to the appropriate energy level.In comparison,the ran-PTF-based devices nearly do not work because of the negative HOMO energy levels offset.This work indicates that both the polymer chain regularity and the energy level offset between the donor and acceptor material are important to the performance of organic solar cells. | Hang Wang Hao Lu Ya-Nan Chen Andong Zhang Yuqiang Liu Cai’e Zhang Yahui Liu Xinjun Xu Zhishan Bo | 2022 | Chinese Journal of Polymer Science2022，40，8： | 0 |
| 15 | High-performance nonfused ring electron acceptor with a steric hindrance induced planar molecular backbone显示文摘Three nonfused ring electron acceptors (NFREAs) TTC6,TT-C8T and TT-TC8 were purposefully designed and synthesized.The molecular geometry can be adjusted by the steric hindrance of lateral substituents.According to the DFT calculations,from TTC6 to TT-C8T and TT-TC8,planarity of the molecular backbone is gradually improved,accompanying with the enhancing of intramolecular charge transfer effect.As for TT-TC8,the two phenyl substituents are almost perpendicular to the molecular backbone,which endues the acceptor with good solubility and suppresses it to form over-aggregation.Multidirectional regular molecular orientation and closer molecular stacking are formed in TT-TC8 film.As a result,TT-TC8 based devices afford the highest PCE of 13.13%,which is much higher than that of TTC6 (4.41%) and TT-C8T (10.42%) and among the highest PCE values based on NFREAs. | Hao Lu Xiaodong Wang Hang Wang Andong Zhang Xinming Zheng Na Yu Zheng Tang Xinjun Xu Yahui Liu Ya-Nan Chen Zhishan Bo | 2022 | Science China Chemistry2022，65，3： | 0 |
| 16 | Enhancing the performance of organic solar cells by modification of cathode with a self-assembled monolayer of aromatic organophosphonic acid显示文摘We use a single-molecule self-assembled layer of an aromatic organophosphonic acid(2PACz) to modify the cathode interface layer in inverted organic solar cells(OSCs). The modified OSCs not only have an obvious improvement in power conversion efficiency(PCE), but also demonstrate greatly enhanced air stability. Ultraviolet photoelectron spectroscopy shows that the work function of cathode interlayer after modification by 2PACz is more suitable for electron extraction. In addition, the surface energy is reduced without affecting the film deposition, which will be beneficial to reduce the interfacial traps. As a result,the PCE of OSCs based on the PBDB-T:IT-M system is increased, and its stability in air is greatly improved(remaining 88% of its initial PCE after 555 h in air). Therefore, we provide a new strategy for constructing high-performance non-fullerene OSCs with enhanced air stability. | Wenlong Liu Hao Lu Yan Zhang Hao Huang Xinming Zheng Yahui Liu Youzhi Wu Xinjun Xu | 2023 | Chinese Chemical Letters2023，34，4： | 0 |
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