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学者姓名:刘纯亮

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< Page ,Total 36 >
Novel electronic readout system for micro-channel plate detector with wedge and strip anode SCIE
期刊论文 | 2019 , 66 (6) , 697-701 | JOURNAL OF MODERN OPTICS
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A micro-channel plate detector with wedge and strip anode can be used for visible and ultraviolet light imaging. In this paper, the imager electronics are designed in order to process specific output charge characteristics. The original signal output from the detector is shaped into a Gaussian pulse signal, and a digital Constant Fraction Discriminator is used to judge the arrival time of the pulse. The resolution of the electronic output image is 1024 x 1024, and the position decoding accuracy is 1 pixel. The experimental imaging resolving power of the detector is as high as 70 mu m.

Keyword :

Micro-channel plate spatial resolving power wedge-and-strip anode

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GB/T 7714 Xu, Neng , Liu, Yong'an , Sheng, Lizhi et al. Novel electronic readout system for micro-channel plate detector with wedge and strip anode [J]. | JOURNAL OF MODERN OPTICS , 2019 , 66 (6) : 697-701 .
MLA Xu, Neng et al. "Novel electronic readout system for micro-channel plate detector with wedge and strip anode" . | JOURNAL OF MODERN OPTICS 66 . 6 (2019) : 697-701 .
APA Xu, Neng , Liu, Yong'an , Sheng, Lizhi , Su, Tong , Chen, Chen , Li, Yao et al. Novel electronic readout system for micro-channel plate detector with wedge and strip anode . | JOURNAL OF MODERN OPTICS , 2019 , 66 (6) , 697-701 .
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Silicon drift detector applied to X-ray pulsar navigation SCIE
期刊论文 | 2019 , 927 , 429-434 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
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Abstract :

In this paper, a focused detection system for X-ray pulsar-based Navigation (XNAV) is designed based on Silicon Drift Detector (SDD). The detector electronics mainly adopts the digital trapezoidal shaping method to measure the Times-Of-Arrival (TOAs) and energy of photons. The time measurement accuracy is better than 500ns. The energy resolution is 191eV at 8.05keV, and the maximum count rate is 500kcps between 1 and 12keV. In the semi-physical simulation experiment, the filtering of noise photons by energy discrimination significantly improves the correlation degree between the cumulative pulse profile and the standard profile.

Keyword :

Times-Of-Arrival X-ray pulsar-based Navigation Silicon drift detector

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GB/T 7714 Xu, Neng , Sheng, Lizhi , Su, Tong et al. Silicon drift detector applied to X-ray pulsar navigation [J]. | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT , 2019 , 927 : 429-434 .
MLA Xu, Neng et al. "Silicon drift detector applied to X-ray pulsar navigation" . | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 927 (2019) : 429-434 .
APA Xu, Neng , Sheng, Lizhi , Su, Tong , Chen, Chen , Li, Yao , Zhao, Baosheng et al. Silicon drift detector applied to X-ray pulsar navigation . | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT , 2019 , 927 , 429-434 .
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MAGIC Simulation of Microwave Generation Using an Active Metamaterial Powered by an Electron Beam EI CPCI-S Scopus
会议论文 | 2018 , 273-274 | 19th IEEE International Vacuum Electronics Conference (IVEC)
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We use the particle-in-cell simulation code MAGIC to model the MIT metamaterial loaded waveguide high power microwave source design and demonstrate coherent microwave generation at 2.4 GHz. In our model, the lens magnetic field to shape the emitted electron beam was separated from the solenoidal magnetic field so that we can control the two magnetic fields independently as in the experiment. In the model, we also introduce the beam collector as in the MIT experiment. The MAGIC simulation results agree well with the MIT CST simulation results for all magnetic fields. We also provide some explanations of possible reasons for the difference between the results of simulation and MIT experiment for certain values of the magnetic field.

Keyword :

magnetic field metamaterial electron beam particle-in-cell simulations (PIC) microwaves

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GB/T 7714 Liu, Meiqin , Liu, Chunliang , Fuks, Mikhail I. et al. MAGIC Simulation of Microwave Generation Using an Active Metamaterial Powered by an Electron Beam [C] . 2018 : 273-274 .
MLA Liu, Meiqin et al. "MAGIC Simulation of Microwave Generation Using an Active Metamaterial Powered by an Electron Beam" . (2018) : 273-274 .
APA Liu, Meiqin , Liu, Chunliang , Fuks, Mikhail I. , Schamiloglu, Edl . MAGIC Simulation of Microwave Generation Using an Active Metamaterial Powered by an Electron Beam . (2018) : 273-274 .
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Plasma spatial distribution manipulation and electrical property enhancement through plasma coupling effect EI Scopus CSSCI-E SCIE
期刊论文 | 2018 , 8 (10) | AIP Advances
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Plasma pattern transition in a symmetric hybrid structure cavity device at micrometer scale is researched through microplasma interaction in intervening microchannel between adjacent cavities while manipulating electric field strength. Plasma distribution reconfiguration in central (objective) cavity is observed when sidearm (donor) cavities are ignited. As long as coupling effect occurred by modulating the electric field strength in the sidearm cavities, stable plasma pattern transition in objective cavity is obtained, exhibiting plasma pattern split from one circular spot (initial pattern) to two small circular spots (transited pattern), along with plasma peak emission intensity displacement over 100 μm to its equilibrium position. The shape of transited plasma patterns are depending on the coupling effect from sidearm cavities. The two circular spots unsymmetrically distributed if either donor cavity is ignited, and the ratio of average emission intensity between the two plasma spots is over 30%, however, which is less than 4% if coupling symmetrically occurred. The electrical and optical properties of central microplasma are also modulated, that the breakthrough voltage is decreased by 22% and emission intensity is improved by ∼30%, by means of plasma coupling. The microplasma pattern formation at micrometre scale and manipulation of the electrical properties in microscale cavity implies significant value in the application of plasma transistor and signal processing. © 2018 Author(s).

Keyword :

Breakthrough voltage Electric field strength Electrical and optical properties Emission intensity Equilibrium positions Micrometer scale Pattern formation Plasma distribution

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GB/T 7714 Wang, Yaogong , Liu, Lingguang , Zhang, Xiaoning et al. Plasma spatial distribution manipulation and electrical property enhancement through plasma coupling effect [J]. | AIP Advances , 2018 , 8 (10) .
MLA Wang, Yaogong et al. "Plasma spatial distribution manipulation and electrical property enhancement through plasma coupling effect" . | AIP Advances 8 . 10 (2018) .
APA Wang, Yaogong , Liu, Lingguang , Zhang, Xiaoning , Jiang, Ming , Liu, Chunliang , Zhang, Qiaogen . Plasma spatial distribution manipulation and electrical property enhancement through plasma coupling effect . | AIP Advances , 2018 , 8 (10) .
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Stationary statistical theory of two-surface multipactor regarding all impacts for efficient threshold analysis EI SCIE Scopus
期刊论文 | 2018 , 25 (1) | PHYSICS OF PLASMAS
WoS CC Cited Count: 3 SCOPUS Cited Count: 3
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Statistical multipactor theories are critical prediction approaches for multipactor breakdown determination. However, these approaches still require a negotiation between the calculation efficiency and accuracy. This paper presents an improved stationary statistical theory for efficient threshold analysis of two-surface multipactor. A general integral equation over the distribution function of the electron emission phase with both the single-sided and double-sided impacts considered is formulated. The modeling results indicate that the improved stationary statistical theory can not only obtain equally good accuracy of multipactor threshold calculation as the nonstationary statistical theory, but also achieve high calculation efficiency concurrently. By using this improved stationary statistical theory, the total time consumption in calculating full multipactor susceptibility zones of parallel plates can be decreased by as much as a factor of four relative to the nonstationary statistical theory. It also shows that the effect of single-sided impacts is indispensable for accurate multipactor prediction of coaxial lines and also more significant for the high order multipactor. Finally, the influence of secondary emission yield (SEY) properties on the multipactor threshold is further investigated. It is observed that the first cross energy and the energy range between the first cross and the SEY maximum both play a significant role in determining the multipactor threshold, which agrees with the numerical simulation results in the literature. Published by AIP Publishing.

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GB/T 7714 Lin, Shu , Wang, Rui , Xia, Ning et al. Stationary statistical theory of two-surface multipactor regarding all impacts for efficient threshold analysis [J]. | PHYSICS OF PLASMAS , 2018 , 25 (1) .
MLA Lin, Shu et al. "Stationary statistical theory of two-surface multipactor regarding all impacts for efficient threshold analysis" . | PHYSICS OF PLASMAS 25 . 1 (2018) .
APA Lin, Shu , Wang, Rui , Xia, Ning , Li, Yongdong , Liu, Chunliang . Stationary statistical theory of two-surface multipactor regarding all impacts for efficient threshold analysis . | PHYSICS OF PLASMAS , 2018 , 25 (1) .
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Discharge dynamics of self-oriented microplasma coupling between cross adjacent cavities in micro-structure device driven by a bipolar pulse waveform EI SCIE Scopus
期刊论文 | 2018 , 25 (4) | PHYSICS OF PLASMAS
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The excitation dynamics and self-oriented plasma coupling of a micro-structure plasma device with a rectangular cross-section are investigated. The device consists of 7 x 7 microcavity arrays, which are blended into a unity by a 50 mu m-thick bulk area above them. The device is operated in argon with a pressure of 200 Torr, driven by a bipolar pulse waveform of 20 kHz. The discharge evolution is characterized by means of electrical measurements and optical emission profiles. It has been found that different emission patterns are observed within microcavities. The formation of these patterns induced by the combined action between the applied electric field and surface deactivation is discussed. The microplasma distribution in some specific regions along the diagonal direction of cavities in the bulk area is observed, and self-oriented microplasma coupling is explored, while the plasma interaction occurred between cross adjacent cavities, contributed by the ionization wave propagation. The velocity of ionization wave propagation is measured to be 1.2 km/s to 3.5 km/s. The exploration of this plasma interaction in the bulk area is of value to applications in electromagnetics and signal processing. Published by AIP Publishing.

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GB/T 7714 Wang, Yaogong , Zhang, Xiaoning , Liu, Lingguang et al. Discharge dynamics of self-oriented microplasma coupling between cross adjacent cavities in micro-structure device driven by a bipolar pulse waveform [J]. | PHYSICS OF PLASMAS , 2018 , 25 (4) .
MLA Wang, Yaogong et al. "Discharge dynamics of self-oriented microplasma coupling between cross adjacent cavities in micro-structure device driven by a bipolar pulse waveform" . | PHYSICS OF PLASMAS 25 . 4 (2018) .
APA Wang, Yaogong , Zhang, Xiaoning , Liu, Lingguang , Zhou, Xuan , Liu, Chunliang , Zhang, Qiaogen . Discharge dynamics of self-oriented microplasma coupling between cross adjacent cavities in micro-structure device driven by a bipolar pulse waveform . | PHYSICS OF PLASMAS , 2018 , 25 (4) .
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Numerical simulation and analysis of passive intermodulation caused by multipaction EI SCIE Scopus
期刊论文 | 2018 , 25 (8) | PHYSICS OF PLASMAS
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In this paper, emphasis is put on passive intermodulation (PIM) caused by multipaction. The results are calculated by particle-in-cell simulation under the conditions of 2-tone and 4-tone carriers. A temporal evolution of the number of particles with different carrier powers is presented. The input and output signals in the time domain and the power spectrum densities of these signals in the frequency domain under different conditions are compared. The relationship between multipaction and PIM interference is discussed. It shows that the appearance of the PIM phenomenon follows the occurrence of saturation of multipactor discharge and the powers of PIM products basically increase as the carrier powers grow. In addition, to suppress the occurrence of PIM interference, an external magnetic field is added in the direction perpendicular to the electric field, which is a practical way to inhibit multipaction, and the effectiveness and the reliability of this method are also verified by simulation. Published by AIP Publishing.

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GB/T 7714 Zhang, Lei , Li, Yongdong , Lin, Shu et al. Numerical simulation and analysis of passive intermodulation caused by multipaction [J]. | PHYSICS OF PLASMAS , 2018 , 25 (8) .
MLA Zhang, Lei et al. "Numerical simulation and analysis of passive intermodulation caused by multipaction" . | PHYSICS OF PLASMAS 25 . 8 (2018) .
APA Zhang, Lei , Li, Yongdong , Lin, Shu , Wang, Hongguang , Liu, Chunliang , Li, Jun et al. Numerical simulation and analysis of passive intermodulation caused by multipaction . | PHYSICS OF PLASMAS , 2018 , 25 (8) .
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空间电子辐照介质材料带电效应研究进展
期刊论文 | 2018 , (1) , 1-8 | 空间电子技术
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针对空间电子辐照对介质材料所产生的带电效应对在轨航天器的服役性能带来了巨大威胁,为深入理解和探究空间电子辐照带电效应的特性和规律,重点介绍了在电子辐照环境下,介质材料的表面电位特性、材料的总带电电荷量以及电子辐照介质内部的实时电荷分布以及动态演变特性,并进一步阐述了带电状态对二次电子发射的反馈动态影响研究.此外,概括了近年来国内外对电子辐照带电的理论数值模拟方法及发展情况.

Keyword :

电子辐照 带电效应 介质材料 二次电子发射

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GB/T 7714 封国宝 , 崔万照 , 刘纯亮 et al. 空间电子辐照介质材料带电效应研究进展 [J]. | 空间电子技术 , 2018 , (1) : 1-8 .
MLA 封国宝 et al. "空间电子辐照介质材料带电效应研究进展" . | 空间电子技术 1 (2018) : 1-8 .
APA 封国宝 , 崔万照 , 刘纯亮 , 胡天存 , 王瑞 , 张娜 . 空间电子辐照介质材料带电效应研究进展 . | 空间电子技术 , 2018 , (1) , 1-8 .
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Multipactor susceptibility chart of coaxial transmission lines with stationary statistical modeling SCIE
期刊论文 | 2018 , 67 (22) | ACTA PHYSICA SINICA
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Multipactor breakdown is a detrimental electromagnetic phenomenon caused by resonant secondary electron emissions synchronizing with field oscillation, which frequently takes place in powerful microwave devices and accelerating structures. Regarded as the principal failure mode of space microwave systems, multipactor may cause the performance to degenerate or even hardware operation to deteriorate catastrophically, thus multipactor becomes a major limitation in promoting the further development of space communication technology. Meanwhile, higher power capacity and volume integration accordingly lead to continuously growing multipactor hazard. In order to prevent multipactor from occurring, the accurate predictive technique to determine multipactor susceptibility has become a key issue for the mechanical design and performance optimization of microwave devices in the ground stage. Compared with the existing approaches to investigating the multipactor, statistical theories are able to conduct multipactor threshold calculation and mechanism analysis, with the stochastic nature of secondary emission fully considered from the probabilistic perspective. Currently, stationary statistical theory of multipactor has been developed for efficient multipactor threshold analysis of the parallel-plate geometry. However, it has not been further extended to the coaxial geometry which is commonly involved in radio frequency (RF) systems. For this reason, the stationary statistical modeling of the coaxial multipactor with all influencing factors considered is detailed in this paper. Due to the field nonuniformity and the secondary emission randomness, analytic equation of electron trajectories in the coaxial geometry is approximately derived by using the perturbation approach. Based on the implicit correlation between electron emission velocity and transit time, the joint probability density function is constructed for the calculation of the probability density distribution of electron transit time. Afterwards, a system of integral equations for depicting electron multiplication process in the coaxial geometry is formulated and solved with a novel and general iteration method. Finally, this stationary statistical theory is applied to the full multipactor susceptibility chart of coaxial transmission lines with typical coating materials in space engineering, such as silver, copper, alumina and alodine. A comparison shows that the calculation results are in reasonable agreement with the experimental measurements provided by the Europe Space Agent. What is more, there exists significant difference between multipactor susceptibility curves of the parallel-plate geometry and the coaxial geometry. This research is of great significance for optimizing the mechanism design and material selection of multipactor-free microwave devices.

Keyword :

statistical theory coaxial geometry stationary modeling multipactor

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GB/T 7714 Lin Shu , Xia Ning , Wang Hong-Guang et al. Multipactor susceptibility chart of coaxial transmission lines with stationary statistical modeling [J]. | ACTA PHYSICA SINICA , 2018 , 67 (22) .
MLA Lin Shu et al. "Multipactor susceptibility chart of coaxial transmission lines with stationary statistical modeling" . | ACTA PHYSICA SINICA 67 . 22 (2018) .
APA Lin Shu , Xia Ning , Wang Hong-Guang , Li Yong-Dong , Liu Chun-Liang . Multipactor susceptibility chart of coaxial transmission lines with stationary statistical modeling . | ACTA PHYSICA SINICA , 2018 , 67 (22) .
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Effect of electron density in multipaction on the electromagnetic characteristics of microwave device EI CPCI-S Scopus
会议论文 | 2018 , 5-6 | Joint 60th IEEE International Symposium on Electromagnetic Compatibility (EMC) / IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (APEMC)
WoS CC Cited Count: 7
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In this paper, a theoretical model is proposed for the evaluation of effect of secondary electron density in multipaction on the electromagnetic characteristics of microwave device. Considering the distribution zone of space electron as a plasma medium, the electromagnetic characteristics of the microwave device are theoretically related to the secondary electron density in multipaction. The coaxial waveguide is simulated using the PIC tool to validate the proposed model. The reflection signal is significantly changed due to the grown of number of electrons, which provides a physical criterion for the multipaction threshold prediction.

Keyword :

electron density multicarrier multipactor microwave device

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GB/T 7714 Wang, Xinbo , Cui, Wanzhao , Li, Yongdong et al. Effect of electron density in multipaction on the electromagnetic characteristics of microwave device [C] . 2018 : 5-6 .
MLA Wang, Xinbo et al. "Effect of electron density in multipaction on the electromagnetic characteristics of microwave device" . (2018) : 5-6 .
APA Wang, Xinbo , Cui, Wanzhao , Li, Yongdong , Zhang, Xiaoning , Liu, Chunliang . Effect of electron density in multipaction on the electromagnetic characteristics of microwave device . (2018) : 5-6 .
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