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Adsorption behavior of water molecules on the surface of lithium hydride 水分子在氢化锂表面的吸附行为
强激光与粒子束 Pub Date : 2020-10-01 DOI: 10.11884/HPLPB202032.200217
Liu Cheng, Lei Jiehong
{"title":"Adsorption behavior of water molecules on the surface of lithium hydride","authors":"Liu Cheng, Lei Jiehong","doi":"10.11884/HPLPB202032.200217","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200217","url":null,"abstract":"The theoretical analysis method is used to calculate the adsorption behavior of water molecules on the surface of lithium hydride, and analyze the influence of surface modification of lithium hydride on its hydrophobic performance. The results show that after constructing groove structure and columnar structure on LiH-111 surface and LiH-100 surface, the adsorption force to water molecules of the modified surface is stronger than that of the complete surface, indicating that the introduction of surface microstructure does change the potential energy distribution. There is a superposition of potential energy at the intersection of the walls, which strengthens the ability to adsorb water molecules, but does not cause changes in the hydrophilic properties of the surface. Water molecules can be stably adsorbed on the perfect LiH (001) surface, and its dissociation energy barrier is only 0.386 eV. This dissociation reaction can be carried out at room temperature. Water molecules are easily dissociated on the LiH surface with structural defects, which is the fundamental reason why LiH decomposes easily in a certain humidity air and water environment.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"102001-1-102001-7"},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43377168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
1106 nm Q -switched Nd:GAGG laser using gold nanocages as saturable absorbers 采用金纳米笼作为可饱和吸收剂的1106 nm调Q Nd:GAGG激光器
强激光与粒子束 Pub Date : 2020-10-01 DOI: 10.11884/HPLPB202032.200127
Zhang Bin, L.T.S. Ying, Liu Binghai
{"title":"1106 nm Q -switched Nd:GAGG laser using gold nanocages as saturable absorbers","authors":"Zhang Bin, L.T.S. Ying, Liu Binghai","doi":"10.11884/HPLPB202032.200127","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200127","url":null,"abstract":"Using gold nanocages (GNCs) as saturable absorbers (SAs), passively Q-switched Nd:GAGG lasers at 1106 nm were demonstrated. For the laser at T = 3%, the maximum output power of 98 mW was received under the pump power of 6.70 W, with the shortest pulse width of 436 ns and the pulse repetition rate of 206 kHz. Q-switched pulse with the shortest pulse duration of 370 ns, pulse repetition rate of 170 kHz was achieved at transmittance T＝7% under the pump power of 7.69 W with the maximum average output power of 121 mW. These results indicate a great potential of the GNCs as SA in the near-infrared lasers.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"101002-1-101002-6"},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43149170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Review of the research on electrode erosion of gas spark switch 气体火花开关电极腐蚀研究综述
强激光与粒子束 Pub Date : 2020-09-29 DOI: 10.11884/HPLPB202032.200114
Luo Cheng, Cong Peitian, Zhang Tianyang, Luo Weixi
{"title":"Review of the research on electrode erosion of gas spark switch","authors":"Luo Cheng, Cong Peitian, Zhang Tianyang, Luo Weixi","doi":"10.11884/HPLPB202032.200114","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200114","url":null,"abstract":"Gas spark switch is the most commonly used key device in pulse power device. The difficult problem of electrode erosion, which affects the performance of gas spark switches, has always become a bottleneck restricting the development and application of gas switch. This article reviews the existing electrode erosion theory and experimental research results, introduces the basic mechanism and simulation model of electrode erosion, summarizes the factors affecting the switching electrode erosion and the research progress of erosion-resistant electrode materials, and finally discusses the problems faced by the erosion research and the direction of optimizing the erosion resistance of the electrode materials.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"105001-1-105001-9"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43438063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spike leakage characteristic of limiter irradiated by high power microwave 高功率微波辐照限幅器的尖峰泄漏特性
强激光与粒子束 Pub Date : 2020-09-29 DOI: 10.11884/HPLPB202032.200097
Chen Zidong, Qin Feng, Zhao Jingtao, Zhao Gang, Liu Zhong
{"title":"Spike leakage characteristic of limiter irradiated by high power microwave","authors":"Chen Zidong, Qin Feng, Zhao Jingtao, Zhao Gang, Liu Zhong","doi":"10.11884/HPLPB202032.200097","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200097","url":null,"abstract":"In this work, the response characteristics of the microwave limiter under various high power microwave irradiation are investigated via both simulation and experiment, and the simulation results match those of the experiment well. When the input power exceeds 6 dBm, a spike leakage phenomenon is observed. As the input power increases, the rise time and pulse width of the leakage peak decrease, whereas the leakage power gradually increases. However, the leakage power of the plateau firstly linearly increases, then gradually decreases, and finally slightly increases. Moreover, the pulse width and repetition frequency have almost no influence on the characteristics of leakage pulse, and the leakage energy decreases as the injection power increases.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"103014-1-103014-7"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45510390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of the high repetitive frequency solid-state pulse generator based on DSRD 基于DSRD的高重复频率固体脉冲发生器的研制
强激光与粒子束 Pub Date : 2020-09-29 DOI: 10.11884/HPLPB202032.200102
Lai Yuchen, Xie Yanzhao, Wang Haiyang, Qiu Yangxin, Yang Jie
{"title":"Development of the high repetitive frequency solid-state pulse generator based on DSRD","authors":"Lai Yuchen, Xie Yanzhao, Wang Haiyang, Qiu Yangxin, Yang Jie","doi":"10.11884/HPLPB202032.200102","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200102","url":null,"abstract":"This paper presents a solid-state pulse generator based on drift step recovery diode (DSRD) - a new high-power, ultra-fast semiconductor opening switch, and a saturable pulse transformer. The topology structure of circuit is designed, the operating principle of the pulse generator is analyzed theoretically. And the influence of several key circuit parameters on the output waveform of the pulse generator is studied, including the coil winding turns, the magnetic core layers, the load resistance, and the trigger pulse width. The experimental results show that the pulse generator can produce a pulse at a 50 kΩ-resistive load with amplitude 38.2 kV, rise time 7.1 ns, pulse width 14.1 ns, output peak power 29.2kW, and it could work stably at the repetition frequency of 400 kHz.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"105002-1-105002-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43323009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of G-band 500 W sheet beam extended-interaction klystron G波段500W片束扩展相互作用速调管的设计
强激光与粒子束 Pub Date : 2020-09-29 DOI: 10.11884/HPLPB202032.200195
Z. Changqing, Feng Jinjun, Cai Jun, Pan Pan
{"title":"Design of G-band 500 W sheet beam extended-interaction klystron","authors":"Z. Changqing, Feng Jinjun, Cai Jun, Pan Pan","doi":"10.11884/HPLPB202032.200195","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200195","url":null,"abstract":"High power generation in terahertz frequency band is limited by physical mechanism. A G-band sheet beam extended-interaction klystron was designed to demonstrate the power level and the physical factors that affect the performance of the klystron. An elliptical electron beam with a voltage of 24.5 kV, a current of 0.6 A and the dimension of 1 mm×0.15 mm was used. To match the size of the sheet beam and obtain high efficiency and high gain, the transverse-oversized barbell type multi-gap resonant cavity was used as the interaction circuit. The 3D PIC simulation results show that more than 500 W of power output can be obtained with the actual cavity loss considered, and the electron efficiency and gain are 3.65% and 38.2 dB respectively. It is found that the power and efficiency are largely restricted by the mode stability of the multi-gap cavity as well as the ohmic loss. The ohmic loss of the output cavity has a significant effect on the final output power which should be given special consideration in engineering design. The research in this paper has laid a good foundation for the development of high frequency sheet beam extended-interaction devices.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"103003-1-103003-8"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49138808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
22 GHz linewidth all-fiber laser achieved 2.62 kW near diffraction-limited output 22 GHz线宽全光纤激光器实现了2.62 kW近衍射极限输出
强激光与粒子束 Pub Date : 2020-09-29 DOI: 10.11884/HPLPB202032.200143
Chu Qiuhui, Liao Ruoyu, Shu Qiang, Tao Rumao, Yan Donglin, Liang Fengyun, Lin Honghuan, Wen Jing, W. Jianjun, Jing Feng
{"title":"22 GHz linewidth all-fiber laser achieved 2.62 kW near diffraction-limited output","authors":"Chu Qiuhui, Liao Ruoyu, Shu Qiang, Tao Rumao, Yan Donglin, Liang Fengyun, Lin Honghuan, Wen Jing, W. Jianjun, Jing Feng","doi":"10.11884/HPLPB202032.200143","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200143","url":null,"abstract":"This paper demonstrates an all-fiber high-power Yb-doped 1064 nm fiber laser based on master oscillator power amplifier structure. The record output power up to 2625 W was achieved, along with a slope efficiency of 76%. The beam quality factor is Mx2＝1.273, My2＝1.255, and full width at half maximum is 21.7 GHz at maximum power level. The fiber laser has the highest output power of all-fiber lasers with 22 GHz linewidth.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"101001-1-101001-2"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43748793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of X-band 50MW klystron x波段50MW速调管的研制
强激光与粒子束 Pub Date : 2020-09-29 DOI: 10.11884/HPLPB202032.200211
Chu Kairong, Sheng Xing, Liao Dongfeng, Dou Yue, Zhong Yong, Zhang Shiqiao
{"title":"Development of X-band 50MW klystron","authors":"Chu Kairong, Sheng Xing, Liao Dongfeng, Dou Yue, Zhong Yong, Zhang Shiqiao","doi":"10.11884/HPLPB202032.200211","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200211","url":null,"abstract":"This paper introduces a technical scheme of X-band high peak power klystron. At present, this klystron has achieved 50 MW pulse output power and 57% efficiency at X band. The pulse width is up to 3.6 μs. By using some key techniques, such as COM method, circle waveguide travelling-wave window, Anticorona ring and coating thin film on ceramic, some problems such as high efficiency, high peak power capacity and high reliability are solved. In particular, COM method can be used to optimize electron beam bunching. Compared with the second harmonic bunching method, the interaction efficiency can be further improved by about 10% under the same length of high frequency tube body. Because of the successfully developed klystron, the peak power level of domestic X-band klystron has been raised from 3 MW to 50 MW, and the performance of the klystron has reached the international leading level.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"103012-1-103012-8"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44551551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Introduction to development of streak and framing cameras 介绍条纹相机和分幅相机的发展
强激光与粒子束 Pub Date : 2020-09-13 DOI: 10.11884/HPLPB202032.200119
Tian Jinshou
{"title":"Introduction to development of streak and framing cameras","authors":"Tian Jinshou","doi":"10.11884/HPLPB202032.200119","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200119","url":null,"abstract":"This paper introduces the significance of the research on ultrafast diagnosis technology, summarizes the history and current situation of streak camera and framing camera, analyzes the technical characteristics and main application fields of several mainstream streak tubes, compares the characteristics of domestic and foreign research and development institutions of ultrafast diagnosis equipment. Finally, it presents the achievements and existing problems of ultrafast diagnosis technology in China as well as a preliminary analysis and discussion on further development in this fied.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"112003-1-112003-17"},"PeriodicalIF":0.0,"publicationDate":"2020-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48923567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Progress of X-ray high-speed photography technology used in laser driven inertial confinement fusion 激光驱动惯性约束聚变中x射线高速摄影技术的研究进展
强激光与粒子束 Pub Date : 2020-09-13 DOI: 10.11884/HPLPB202032.200099
Cao Zhu-rong, Wang Qiangqiang, Deng Bo, Chen Tao, Deng Keli, Wang Weirong, Peng Xingyu, Chen Zhongjing, Yuan Zheng, Li Yu-Kun, Wang Peng, Chen Bo-lun, Wang Feng, He Haien, Liang Xingzhu, Xu Ze-ping, Yang Dong, Yang Jia-min, Jiang Shao－en, Ding Yong-kun, Zhang Wei-Yan
{"title":"Progress of X-ray high-speed photography technology used in laser driven inertial confinement fusion","authors":"Cao Zhu-rong, Wang Qiangqiang, Deng Bo, Chen Tao, Deng Keli, Wang Weirong, Peng Xingyu, Chen Zhongjing, Yuan Zheng, Li Yu-Kun, Wang Peng, Chen Bo-lun, Wang Feng, He Haien, Liang Xingzhu, Xu Ze-ping, Yang Dong, Yang Jia-min, Jiang Shao－en, Ding Yong-kun, Zhang Wei-Yan","doi":"10.11884/HPLPB202032.200099","DOIUrl":"https://doi.org/10.11884/HPLPB202032.200099","url":null,"abstract":"In the study of laser driven inertial confinement fusion (ICF), the image data obtained through X-ray high-speed photography technology can be used to analyze the spatial and temporal evolution of the plasma with fluid state produced by work and energy transport. The research of X-ray high-speed photography technology has always been an important part of the development of ICF diagnostics. The Laser Fusion Research Center of China Academy of Engineering Physics has made important progresses in the research of X-ray high-speed photography technology in recent years. These advances include: (1) making a success in developing the X-ray camera with 100ps exposure time for Shenguang laser facilities, which has reached the international advanced level as a whole, and is characterised in such aspects as high sensitivity, transmission-type band-pass filtering and miniaturized design; (2) proposing new types of X-ray high-speed photography technologies with 10 ps exposure time such as the micro-sweep gating technology to break the bottleneck of temporal resolution; (3) taking the lead in carrying out theoretical design, technical verification and engineering design of the radiation-hardened X-ray high-speed camera in China; (4) making the efforts on modeling and simulation on target debris and carrying out the special experiments for the first time in China to verify the simulation results.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"32 1","pages":"112004-1-112004-13"},"PeriodicalIF":0.0,"publicationDate":"2020-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48177543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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