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Experimental results of a magnetic field modification to the radio frequency driver of a negative ion source

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Plasma Science and Technology 2024年第4期26卷 162-167页

作者：谢俊炜谢亚红韦江龙梁立振彭旭峰杨宇雯顾玉明胡纯栋谢远来 Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China

A magnetic field produced by a current flowing through the plasma grid(PG) is one of the solutions to reduce the collisional loss of negative ions in a negative ion source, which reduces the electron temperature in front of the PG. However, the magnetic field diffused into the driver has some influence on the plasma outflowing. In order to investigate the effect of changing this magnetic field on the outflowing of plasma from the driver, a circular ring(absorber) of high permeability iron has been introduced at the driver exit, which can reduce the magnetic field around it and improve plasma outflowing. With the application of the absorber, the electron density is increased by about 35%, and the extraction current measured from the extraction grid is increased from 1.02 A to 1.29 A. The results of the extraction experiment with cesium injection show that both the extraction grid(EG) current and H-current are increased when the absorber is introduced.

关键词： neutral beam injection negative ion source magnetic filter radio frequency ion source

Optimization of perovskite/carbon interface performance using N-doped coal-based graphene quantum dots and its mechanism analysis

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Journal of Energy Chemistry 2023年第4期79卷 242-252页

作者： Qixu Hu Xiaoyu Yang Ying Qi Peng Wei Jian Cheng yahong xie State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830017XinjiangChina Department of Materials&Chemical Engineering Hanyang UniversitySeoul 04763South Korea

Optimizing the interfacial properties between perovskite and carbon electrodes has always been an important way to improve the photoelectric conversion efficiency(PCE)of carbon-based perovskite solar cells(C-PSCs)and facilitate their *** this paper,nitrogen-doped graphene quantum dots(N-GQDs)with fluorescent properties were successfully prepared using inexpensive coal as raw material by a facile and environmentally friendly chemical reagent *** results show that the electron-rich pyridinic nitrogen in N-GQDs can act as Lewis bases to form coordination bonds with uncoordinated lead ions by sharing electron pairs,thereby reducing the defect density and nonradiative recombination of photo-generated electron-hole,and extending lifetime of charge *** addition,due to the passivation of N-GQDs,the hysteresis effect of the device is significantly reduced and the long-term stability is also *** optimizing the concentration,the PCE of C-PSCs achieved a maximum of 14.31%,which was improved by 20.25%compared with 11.90%of the pristine *** work provides a facile,environmentally friendly and efficient strategy for improving the overall performance of C-PSCs using inexpensive coal-based N-GQDs.

关键词： Carbon-basedPSCs Nitrogen-doped GQDs Reducing the defect density Nonradiative recombination

大面积单激励器射频离子源等离子体均匀性分析

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能源研究与管理 2024年第1期16卷 138-144页

作者：杨立鑫陈俞钱谢亚红彭旭峰梁立振胡纯栋东华理工大学核科学与工程学院南昌330013 中国科学院合肥物质研究院等离子体物理研究所合肥230031

为了提高等离子体分布均匀度,基于有限元分析法与实验相结合的方法,从射频离子源驱动器尺寸和引出区尺寸2个方面对单驱动射频离子源放电室进行设计。模拟研究结果表明,电子均匀度的增长幅度随驱动器尺寸的大小变化比较缓慢。根据不同驱... 详细信息

为了提高等离子体分布均匀度,基于有限元分析法与实验相结合的方法,从射频离子源驱动器尺寸和引出区尺寸2个方面对单驱动射频离子源放电室进行设计。模拟研究结果表明,电子均匀度的增长幅度随驱动器尺寸的大小变化比较缓慢。根据不同驱动器尺寸电子密度分布研究结果,在引出区尺寸为320 mm时,电子均匀度能够满足90%的要求。根据实验研究结果表明,在引出区尺寸为320 mm时电子分布均匀且均匀度>90%,并与模拟结果相吻合。因此,为使得等离子体分布均匀度能够达到要求,离子源放电室底部引出面附近引出区尺寸应该设计为320 mm。

关键词：射频离子源驱动器尺寸引出区尺寸电子均匀度

MULTI-LAYER PIEZOELECTRIC ACTUATOR AND ITS APPLICATION IN CONTROLLABLE CONSTRAINED DAMPING TREATMENT

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Chinese Journal of Mechanical Engineering 2007年第4期20卷 94-100页

作者： ZHANG Xinong xie Shilin ZHANG yahong School of Aerospace Xi＇ an Jiaotong University Xi＇ an 710049. China

A kind of novel multi-layer piezoelectric actuator is proposed and integrated with controllable constrained damping treatment to perform hybrid vibration control. The governing equation of the system is derived based on the constitutive equations of elastic, viscoelastic and piezoelectric materials, which shows that the magnitude of control force exerted by multi-layer piezoelectric actuator is the quadratic function of the number of piezoelectric laminates used but in direct proportion to control voltage. This means that the multi-layer actuator can produce greater actuating force than that by piezoelectric laminate actuator with the same area under the identical control voltage. The optimal location placement of the multi-layer piezoelectric actuator is also discussed. As an example, the hybrid vibration control of a cantilever rectangular thin-plate is numerically simulated and carried out experimentally. The simulated and experimental results validate the power of multi-layer piezoelectric actuator and indicate that the present hybrid damping technique can effectively suppress the low frequency modal vibration of the experimental thin-plate structure.

关键词： Vibration control Multi-layer piezoelectric actuator Controllable constrained damping treatment Hybrid damping

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基于TDLAS的气体检测技术对比与分析

计量与测试技术 2024年第4期51卷 35-39页

作者：柳山虎吴勇梁立振谢亚红韦江龙胡纯栋山东建筑大学理学院中国科学院合肥物质科学研究院安徽建筑大学

根据可调谐半导体激光吸收光谱(TDLAS)技术测量气体浓度的基本原理,对三种主要测量方法,即直接吸收光谱技术(DAS)、波长调制技术(WMS)、频率调制光谱技术(FMS)进行详细分析,并根据TDLAS技术的应用情况,分别将系统组成、技术要点、检测... 详细信息

根据可调谐半导体激光吸收光谱(TDLAS)技术测量气体浓度的基本原理,对三种主要测量方法,即直接吸收光谱技术(DAS)、波长调制技术(WMS)、频率调制光谱技术(FMS)进行详细分析,并根据TDLAS技术的应用情况,分别将系统组成、技术要点、检测极限、系统成本和适用环境进行对比分析。

关键词：可调谐半导体激光吸收光谱气体检测检测限

Design of the reflection magnet and its shielding effect analysis for the neutral beam injector of EAST

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Nuclear Science and Techniques 2011年第2期22卷 70-76页

作者： LIANG Lizhen HU Chundong xie Yuanlai WEI Jianglong xie yahong LI Jun Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

In this paper,a reflection magnet to be installed in the EAST neutral beam injection system is simulated and *** field intensity of reflection magnet of 42-cm maximum bending radius is about 1.539×10-1 T for 100 keV deuterium *** shielding cage is formed by *** the ANSOFT software,the magnetic shielding effect was estimated at about 3% at the magnet pole region.

关键词：中性束注入系统屏蔽效果效果分析设计反射磁铁 Ansoft软件磁场强度

基于全永磁微波离子源钛自成靶的D-D中子源设计研究

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真空与低温 2024年第3期30卷 336-342页

作者：李旭廖晨伦谢亚红曹小岗洪兵梁立振顾玉明胡纯栋孟献才合肥综合性国家科学中心能源研究院安徽省能源实验室合肥230031 东华理工大学核科学与工程学院南昌330032 中国科学院合肥物质科学研究院等离子体物理研究所合肥230031

介绍了一种基于全永磁微波离子源钛自成靶技术的紧凑型氘氘(D-D)中子源,其设计中子产额为1×10^(9)s^(-1)。该D-D中子源已经进行了800 h以上的测试,系统可重复稳定运行。早期测试结果显示,系统打火频率高、中子产额低,长时间放电后反向... 详细信息

介绍了一种基于全永磁微波离子源钛自成靶技术的紧凑型氘氘(D-D)中子源,其设计中子产额为1×10^(9)s^(-1)。该D-D中子源已经进行了800 h以上的测试,系统可重复稳定运行。早期测试结果显示,系统打火频率高、中子产额低,长时间放电后反向电子会烧蚀Al2O3陶瓷窗,导致微波耦合困难,氘等离子体无法点亮。通过在等离子体腔室中添加氮化硼(BN)保护片以及在钛靶与高压电极之间增加电子抑制电阻,有效抑制了Al2O3陶瓷窗的损伤。通过对等离子体电极孔径的优化和降低腔室压力,降低了打火频率,提高了中子的产额。系统优化后,氘离子能量为70 keV、束流强度为5 mA时,中子产额达到了2.0×10^(8)s^(-1)。在氘离子能量为97 keV、束流强度为6.6 mA时,系统中子产额达到5.2×10^(8)s^(-1)。

关键词：微波离子源氘氘核反应钛自成靶中子源

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CONSTRUCTION COOPERATION

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Beijing Review 2017年第19期60卷 18-19页

作者： xie yahong

Belt and Road projects bring concrete benefits to Aktogay in Kazakhstan Each year,countless trains roar through Aktogay in eastern Kazakhstan,a main railway hub of the New

关键词：合作新亚欧大陆桥哈萨克斯坦铁路枢纽轰鸣声选矿厂宝藏火车

Chinese Projects Bring New Opportunities to Aktogay in Kazakhstan

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China Today 2017年第3期66卷 24-26页

作者： xie yahong People’s Daily

EACH year,countless trains roar through Aktogay in eastern Kazakhstan,the main railway hub of the New Eurasian Continental *** town has seen additional revitalization due to its subterranean treasure,which lies beneat... 详细信息

关键词：哈萨克斯坦中国欧亚大陆桥铁路枢纽轰鸣声选矿厂宝藏火车