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Tamping the movement of the laser absorption cutoff position using gold foam hohlraum
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作者 张璐 李丽灵 +14 位作者 林稚伟 董云松 景龙飞 郑建华 况龙钰 黎航 郑金华 张继彦 宋天明 张志宇 赵阳 牛高 杨冬 杨家敏 丁永坤 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第5期56-61,共6页
In indirect-driven laser fusion experiments,the movement of the laser absorption layer will distort the radiation uniformity on the capsule.The gold foam has advantages in symmetry control and lowering wall plasma blo... In indirect-driven laser fusion experiments,the movement of the laser absorption layer will distort the radiation uniformity on the capsule.The gold foam has advantages in symmetry control and lowering wall plasma blowoff when used in an inertial confinement fusion(ICF)hohlraum.This work investigates the motion of the laser absorption cutoff position using lowdensity foam gold walls.It is found that the motion of the laser absorption cutoff position can be significantly mitigated through optimal initial low density,tailored to a specific laser shape.For a short square laser pulse,the laser absorption cutoff position remains almost stationary at an initial density of approximately 0.6 g cm^(-3).For a long-shaped laser pulse,the minimal motion of the laser absorption cutoff position is observed at an initial density of about 0.1 g cm^(-3).This approach allows for the adjustment of the symmetry of the hohlraum radiation source.The insights gained from this study serve as a crucial reference for optimizing the hohlraum wall density. 展开更多
关键词 hohlraum symmetry laser absorption plasma blowoff gold foam
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Studies on the motion and radiation of interior plasmas in gas-filled hohlraums with different laser entrance hole sizes
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作者 郭亮 李欣 +21 位作者 李琦 李三伟 胡昕 李晋 邓博 邓克立 王强强 曹柱荣 侯立飞 车兴森 杜华冰 徐涛 何小安 李志超 蒋小华 蒋炜 郑春阳 郑无敌 宋鹏 丁永坤 杨冬 杨家敏 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第7期40-47,共8页
An experiment on 100 k J laser facility is performed to study the motive features and radiation properties of plasmas from different areas inside gas-filled cylindrical hohlraums.These hohlraums are designed to posses... An experiment on 100 k J laser facility is performed to study the motive features and radiation properties of plasmas from different areas inside gas-filled cylindrical hohlraums.These hohlraums are designed to possess one open end and one laser entrance hole(LEH)with different diameters,which would or not result in the blocking of the LEH.An x-ray streak camera that is set at 16 degrees with respect to the hohlraum axis is applied to acquire the timeresolved x-ray images from the open end.Based on the images,we can study the evolutions of the wall plasma,corona bubble plasma and LEH plasma simultaneously through an equivalent view field of hohlraum interior.Multi-group flat response x-ray detectors are applied to measure the x-ray fluxes.In order to understand these characteristics,our two-dimensional radiation hydrodynamic code is used to simulate the experimental results.For the accuracy of reproduction,dielectronic recombination and two parameter corrections are applied in our code.Based on the comparison between experiments and simulations,we quantitatively understand the blocking process of LEH and the motion effects of other plasmas.The calibrated code is beneficial to design the gas-filled hohlraum in a nearby parameter space,especially the limit size of LEH. 展开更多
关键词 gas-filled hohlraum plasma expansion LEH blocking
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Progress in octahedral spherical hohlraum study 被引量:5
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作者 Ke Lan Jie Liu +36 位作者 Zhichao Li Xufei Xie Wenyi Huo Yaohua Chen Guoli Ren Chunyang Zheng Dong Yang Sanwei Li Zhiwen Yang Liang Guo Shu Li Mingyu Zhang Xiaoying Han Chuanlei Zhai Lifei Hou Yukun Li Keli Deng Zheng Yuan Xiayu Zhan Feng Wang Guanghui Yuan Haijun Zhang Bobin Jiang Lizhen Huang Wei Zhang Kai Du Runchang Zhao Ping Li Wei Wang Jingqin Su Xuewei Deng Dongxia Hu Wei Zhou Huaiting Jia Yongkun Ding Wanguo Zheng Xiantu He 《Matter and Radiation at Extremes》 SCIE EI CAS 2016年第1期8-27,共20页
In this paper,we give a review of our theoretical and experimental progress in octahedral spherical hohlraum study.From our theoretical study,the octahedral spherical hohlraums with 6 Laser Entrance Holes(LEHs)of octa... In this paper,we give a review of our theoretical and experimental progress in octahedral spherical hohlraum study.From our theoretical study,the octahedral spherical hohlraums with 6 Laser Entrance Holes(LEHs)of octahedral symmetry have robust high symmetry during the capsule implosion at hohlraum-to-capsule radius ratio larger than 3.7.In addition,the octahedral spherical hohlraums also have potential superiority on low backscattering without supplementary technology.We studied the laser arrangement and constraints of the octahedral spherical hohlraums,and gave a design on the laser arrangement for ignition octahedral hohlraums.As a result,the injection angle of laser beams of 50°-60°was proposed as the optimum candidate range for the octahedral spherical hohlraums.We proposed a novel octahedral spherical hohlraum with cylindrical LEHs and LEH shields,in order to increase the laser coupling efficiency and improve the capsule symmetry and to mitigate the influence of the wall blowoff on laser transport.We studied on the sensitivity of the octahedral spherical hohlraums to random errors and compared the sensitivity among the octahedral spherical hohlraums,the rugby hohlraums and the cylindrical hohlraums,and the results show that the octahedral spherical hohlraums are robust to these random errors while the cylindrical hohlraums are the most sensitive.Up till to now,we have carried out three experiments on the spherical hohlraum with 2 LEHs on Shenguang(SG)laser facilities,including demonstration of improving laser transport by using the cylindrical LEHs in the spherical hohlraums,spherical hohlraum energetics on the SGIII prototype laser facility,and comparisons of laser plasma instabilities between the spherical hohlraums and the cylindrical hohlraums on the SGIII laser facility. 展开更多
关键词 Indirect-drive inertial confinement fusion Novel spherical hohlraum with 6 LEHs High and robust radiation symmetry High energy coupling efficiency Theoretical study Experiments
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Simulations on the multi-shell target ignition driven by radiation pulse in Z-pinch dynamic hohlraum 被引量:2
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作者 Shi-Jia Chen Yan-Yun Ma +4 位作者 Fu-Yuan Wu Xiao-Hu Yang Yun Yuan Ye Cui Rafael Ramis 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第11期411-418,共8页
We present the first simulation results of a multi-shell target ignition driven by Z-pinch dynamic hohlraum radiation pulse.The radiation pulse is produced with a special Z-pinch dynamic hohlraum configuration,where t... We present the first simulation results of a multi-shell target ignition driven by Z-pinch dynamic hohlraum radiation pulse.The radiation pulse is produced with a special Z-pinch dynamic hohlraum configuration,where the hohlraum is composed of a single metal liner,a low-Z plastic foam,and a high-Z metallic foam.The implosion dynamics of a hohlraum and a multi-shell target are investigated separately by the one-dimensional code MULTI-IFE.When the peak drive current is 50 MA,simulations suggest that an x-ray pulse with nearly constant radiation temperature(-310 eV)and a duration about 9 ns can be obtained.A small multi-shell target with a radius of 1.35 mm driven by this radiation pulse is able to achieve volumetric ignition with an energy gain(G)about 6.19,where G is the ratio of the yield to the absorbed radiation.Through this research,we better understand the effects of non-uniformities and hydrodynamics instabilities in Z-pinch dynamic hohlraum. 展开更多
关键词 Z-PINCH dynamic hohlraum radiation pulse volumetric ignition
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Numerical studies on the radiation uniformity of Z-pinch dynamic hohlraum 被引量:2
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作者 Fuyuan Wu Yanyun Chu +13 位作者 Rafael Ramis Zhenghong Li Yanyun Ma Jianlun Yang Zhen Wang Fan Ye Zhanchang Huang Jianmin Qi Lin Zhou Chuan Liang Shijia Chen Zheyi Ge Xiaohu Yang Shangwu Wang 《Matter and Radiation at Extremes》 SCIE EI CAS 2018年第5期248-255,共8页
Radiation uniformity is important for Z-pinch dynamic hohlraum driven fusion. In order to understand the radiation uniformity of Z-pinchdynamic hohlraum, the code MULTI-2D with a new developed magnetic field package i... Radiation uniformity is important for Z-pinch dynamic hohlraum driven fusion. In order to understand the radiation uniformity of Z-pinchdynamic hohlraum, the code MULTI-2D with a new developed magnetic field package is employed to investigate the related physical processeson Julong-I facility with drive current about 7e8 MA. Numerical simulations suggest that Z-pinch dynamic hohlraum with radiation temperaturemore than 100 eV can be created on Julong-I facility. Although some X-rays can escape out of the hohlraum from Z-pinch plasma and electrodes, the radiation field near the foam center is quite uniform after a transition time. For the load parameters used in this paper, the transitiontime for the thermal wave transports from r = 1 mm to r = 0 mm is about 2.0 ns. Implosion of a testing pellet driven by cylindrical dynamichohlraum shows that symmetrical implosion is hard to achieve due to the relatively slow propagation speed of thermal wave and the compressionof cylindrical shock in the foam. With the help of quasi-spherical implosion, the hohlraum radiation uniformity and corresponding pelletimplosion symmetry can be significantly improved thanks to the shape modulation of thermal wave front and shock wave front. 展开更多
关键词 Z-PINCH Dynamic hohlraum Radiation uniformity Shock wave Thermal wave
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First experimental comparisons of laser-plasma interactions between spherical and cylindrical hohlraums at SGⅢ laser facility 被引量:2
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作者 Yaohua Chen Zhichao Li +33 位作者 Xufei Xie Chunyang Zheng Chuanlei Zhai Liang Hao Dong Yang Wenyi Huo Guoli Ren Jie Liu Xiaoshi Peng Tao Xu Yulong Li Sanwei Li Zhiwen Yang Liang Guo Lifei Hou Yonggang Liu Huiyue Wei Xiangming Liu Weiyi Cha Yukun Li Keli Deng Zheng Yuan Xiayu Zhan Haijun Zhang Baibin Jiang Wei Zhang Kai Du Xuewei Deng Yongkun Ding Xiaofeng Wei Wanguo Zheng Xiaodong Chen Xiantu He Ke Lan 《Matter and Radiation at Extremes》 SCIE EI CAS 2017年第2期77-86,共10页
We present our recent laser-plasmas instability(LPI)comparison experiment at the SGIII laser facility between the spherical and cylindrical hohlraums.Three kinds of filling are considered:vacuum,gas-filling with or wi... We present our recent laser-plasmas instability(LPI)comparison experiment at the SGIII laser facility between the spherical and cylindrical hohlraums.Three kinds of filling are considered:vacuum,gas-filling with or without a capsule inside.A spherical hohlraum of 3.6 mm in diameter,and a cylindrical hohlraum of 2.4 mm?4.3 mm are used.The capsule diameter is 0.96 mm.A flat-top laser pulse with 3 ns duration and up to 92.73 kJ energy is used.The experiment has shown that the LPI level in the spherical hohlraum is close to that of the outer beam in the cylindrical hohlraum,while much lower than that of the inner beam.The experiment is further simulated by using our 2-dimensional radiation hydrodynamic code LARED-Integration,and the laser back-scattering fraction and the stimulated Raman scatter(SRS)spectrum are post-processed by the high efficiency code of laser interaction with plasmas HLIP.According to the simulation,the plasma waves are strongly damped and the SRS is mainly developed at the plasma conditions of electron density from 0.08 n_(c) to 0.1 n_(c) and electron temperature from 1.5 keV to 2.0 keV inside the hohlraums.However,obvious differences between the simulation and experiment are found,such as that the SRS back-scattering is underestimated,and the numerical SRS spectrum peaks at a larger wavelength and at a later time than the data.These dif-ferences indicate that the development of a 3D radiation hydrodynamic code,with more accurate physics models,is mandatory for spherical hohlraum study. 展开更多
关键词 Laser-plasmas interactions Spherical hohlraum Stimulated Raman scattering Stimulated Brillouin scattering
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A new ignition hohlraum design for indirect-drive inertial confinement fusion 被引量:1
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作者 李欣 吴畅书 +6 位作者 戴振生 郑无敌 谷建法 古培俊 邹士阳 刘杰 朱少平 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第8期256-260,共5页
In this paper,a six-cylinder-port hohlraum is proposed to provide high symmetry flux on capsule.It is designed to ignite a capsule with 1.2-mm radius in indirect-drive inertial confinement fusion(ICF).Flux symmetry ... In this paper,a six-cylinder-port hohlraum is proposed to provide high symmetry flux on capsule.It is designed to ignite a capsule with 1.2-mm radius in indirect-drive inertial confinement fusion(ICF).Flux symmetry and laser energy are calculated by using three-dimensional view factor method and laser energy balance in hohlraum.Plasma conditions are analyzed based on the two-dimensional radiation-hydrodynamic simulations.There is no Y_(lm)(l≤4) asymmetry in the six-cylinder-port hohlraum when the influences of laser entrance holes(LEHs) and laser spots cancel each other out with suitable target parameters.A radiation drive with 300 eV and good flux symmetry can be achieved by using a laser energy of 2.3 MJ and peak power of 500 TW.According to the simulations,the electron temperature and the electron density on the wall of laser cone are high and low,respectively,which are similar to those of outer cones in the hohlraums on National Ignition Facility(NTF).And the laser intensity is also as low as those of NIF outer cones.So the backscattering due to laser plasma interaction(LPI) is considered to be negligible.The six-cyliner-port hohlraum could be superior to the traditional cylindrical hohlraum and the octahedral hohlraum in both higher symmetry and lower backscattering without supplementary technology at an acceptable laser energy level.It is undoubted that the hohlraum will add to the diversity of ICF approaches. 展开更多
关键词 ICE hohlraums IGNITION six-cylinder port
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Analysis of hohlraum energetics of the SG series and the NIF experiments with energy balance model 被引量:2
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作者 Guoli Ren Jie Liu +1 位作者 Wenyi Huo Ke Lan 《Matter and Radiation at Extremes》 SCIE EI CAS 2017年第1期22-27,共6页
The basic energy balance model is applied to analyze the hohlraum energetics data from the Shenguang(SG)series laser facilities and the National Ignition Facility(NIF)experiments published in the past few years.The an... The basic energy balance model is applied to analyze the hohlraum energetics data from the Shenguang(SG)series laser facilities and the National Ignition Facility(NIF)experiments published in the past few years.The analysis shows that the overall hohlraum energetics data are in agreement with the energy balance model within 20%deviation.The 20%deviation might be caused by the diversity in hohlraum parameters,such as material,laser pulse,gas filling density,etc.In addition,the NIF's ignition target designs and our ignition target designs given by simulations are also in accordance with the energy balance model.This work confirms the value of the energy balance model for ignition target design and experimental data assessment,and demonstrates that the NIF energy is enough to achieve ignition if a 1D spherical radiation drive could be created,meanwhile both the laser plasma instabilities and hydrodynamic instabilities could be suppressed. 展开更多
关键词 Energy balance model hohlraum energetics National Ignition Facility(NIF) Shenguang(SG)series
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First demonstration of improving laser propagation inside the spherical hohlraums by using the cylindrical laser entrance hole 被引量:1
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作者 Wenyi Huo Zhichao Li +24 位作者 Dong Yang Ke Lan Jie Liu Guoli Ren Sanwei Li Zhiwen Yang Liang Guo Lifei Hou Xuefei Xie Yukun Li Keli Deng Zheng Yuan Xiayu Zhan Guanghui Yuan Haijun Zhang Baibin Jiang Lizhen Huang Kai Du Runchang Zhao Ping Li Wei Wang Jingqin Su Yongkun Ding Xiantu He Weiyan Zhang 《Matter and Radiation at Extremes》 SCIE EI CAS 2016年第1期2-7,共6页
The octahedral spherical hohlraums have natural superiority in maintaining high radiation symmetry during the entire capsule implosion process in indirect drive inertial confinement fusion.While,in contrast to the cyl... The octahedral spherical hohlraums have natural superiority in maintaining high radiation symmetry during the entire capsule implosion process in indirect drive inertial confinement fusion.While,in contrast to the cylindrical hohlraums,the narrow space between the laser beams and the spherical hohlraum wall is usually commented.In this Letter,we address this crucial issue and report our experimental work conducted on the SGIII-prototype laser facility which unambiguously demonstrates that a simple design of cylindrical laser entrance hole(LEH)can dramatically improve the laser propagation inside the spherical hohlraums.In addition,the laser beam deflection in the hohlraum is observed for the first time in the experiments.Our 2-dimensional simulation results also verify qualitatively the advantages of the spherical hohlraums with cylindrical LEHs.Our results imply the prospect of adopting the cylindrical LEHs in future spherical ignition hohlraum design. 展开更多
关键词 Spherical hohlraum Laser propagation Cylindrical laser entrance hole Laser spot movement
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Influence analysis of symmetry on capsule in six-cylinder-port hohlraum
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作者 You Zou Wudi Zheng Xin Li 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第3期270-275,共6页
We have investigated the flux symmetry on the capsule in a six-cylinder-port hohlraum for improving the design of the hohlraum. The influence factors of drive symmetry on the capsule in the hohlraum are studied, inclu... We have investigated the flux symmetry on the capsule in a six-cylinder-port hohlraum for improving the design of the hohlraum. The influence factors of drive symmetry on the capsule in the hohlraum are studied, including laser power,laser beams arrangement, hohlraum geometric parameters, plasma condition, capsule convergence, etc. The x-ray radiation flux distribution on the capsule is obtained based on the three-dimensional view factor model. In the six-cylinder-port hohlraum, the main drive asymmetry is the C40 mode asymmetry. When the C40 mode asymmetry approaches zero, the drive symmetry on the capsule is optimal. Our results demonstrate that in order to have a high flux symmetry on the capsule in the laser main-pulse stage, more negative initial C40 modes are needed, which can be realized by adjusting the hohlraum geometry parameters. The hohlraum with column length L_H = 4.81 mm has an optimal symmetry in the laser main-pulse stage. 展开更多
关键词 inertial confinement fusion(ICF) six-cylinder-port hohlraum flux SYMMETRY three-dimensional view factor model
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Spatio-temporal evolution of the optical field on a hohlraum wall at the rising edge of a flat-topped pulse 被引量:3
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作者 Zhaoyang Jiao Yanli Zhang +1 位作者 Junyong Zhang Jianqiang Zhu 《High Power Laser Science and Engineering》 SCIE CAS 2013年第2期88-93,共6页
Considering the time delay in different hohlraum wall positions caused by oblique incidence,the spatio-temporal optical field distribution characteristics of a hohlraum wall,especially during the rising edge of a flat... Considering the time delay in different hohlraum wall positions caused by oblique incidence,the spatio-temporal optical field distribution characteristics of a hohlraum wall,especially during the rising edge of a flat-topped pulse,is simulated by a fast Fourier transform method together with chromatography.Results demonstrate that beam propagation along the hohlraum wall is a push-broom process with complex dynamic spatial–temporal evolution.In the first few picoseconds,the optical intensity of the front position increases rapidly,while that of the rear position is relatively weak.The ratio R of the optical intensity during the rising edge is smaller than that of the steady state.R gradually increases and finally tends to the value of the steady state with time.Calculation also shows that,with shorter total width of the rising edge,R of the optical field decreases and the difference compared to the steady state becomes larger.The evolution is more severe with smaller angle of inclination. 展开更多
关键词 CHROMATOGRAPHY hohlraum WALL optical field distribution RISING edge SPATIO-TEMPORAL EVOLUTION
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嵌入硬泡沫层和靶丸的Z箍缩动态黑腔动力学行为及其辐射场模拟研究
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作者 宁成 黄炜昊 +1 位作者 薛创 文武 《强激光与粒子束》 CAS CSCD 北大核心 2023年第8期68-79,共12页
利用自行开发的二维辐射磁流体力学程序,模拟研究在软泡沫柱外嵌套硬泡沫层、中心嵌套结构靶丸的动态黑腔整体动力学行为和热力学性能,以发现硬泡沫层对动态黑腔辐射场的影响和调制作用,以及腔靶耦合相互作用规律。对峰值50 MA、全上升... 利用自行开发的二维辐射磁流体力学程序,模拟研究在软泡沫柱外嵌套硬泡沫层、中心嵌套结构靶丸的动态黑腔整体动力学行为和热力学性能,以发现硬泡沫层对动态黑腔辐射场的影响和调制作用,以及腔靶耦合相互作用规律。对峰值50 MA、全上升时间300 ns的驱动电流,模拟结果的比较分析表明,嵌套硬泡沫层后靶丸感受到的辐射场温度开始升高时刻延后,辐射均匀更迅速,辐射温度第一峰下降,变化更顺滑,黑腔存在时间变长,达到10 ns以上,后期辐射温度大于350 eV,波形与美国靶丸点火成功实验中的黑腔辐射温度变化曲线比较接近;与没有靶丸的动态黑腔的相同区域辐射温度相比较,嵌入靶丸后,靶丸在烧蚀后期感受到的辐射驱动温度增加。故嵌套硬泡沫层和腔靶耦合都有益于聚变靶丸的烧蚀内爆。 展开更多
关键词 Z箍缩 动态黑腔 辐射场调制 惯性约束聚变 靶丸
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负载等离子体扰动对Z箍缩动态黑腔辐射温度的影响
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作者 刘晓丽 祁建敏 褚衍运 《强激光与粒子束》 CAS CSCD 北大核心 2023年第5期29-37,共9页
通过二维辐射流体力学模拟研究了Z箍缩动态黑腔负载等离子体撞击泡沫柱的动力学过程,探索了带扰动负载等离子体形状对黑腔内辐射温度的影响。结果表明,带有扰动的负载等离子体撞击泡沫后会产生Rayleigh-Taylor(RT)流体不稳定性,导致动... 通过二维辐射流体力学模拟研究了Z箍缩动态黑腔负载等离子体撞击泡沫柱的动力学过程,探索了带扰动负载等离子体形状对黑腔内辐射温度的影响。结果表明,带有扰动的负载等离子体撞击泡沫后会产生Rayleigh-Taylor(RT)流体不稳定性,导致动态黑腔内的辐射在负载等离子体光薄区域发生漏失,使黑腔内辐射温度降低;负载等离子体扰动振幅越大、波长越大,辐射漏失越严重,同等动能加载条件下黑腔内辐射温度也越低。 展开更多
关键词 Z箍缩 动态黑腔 等离子体扰动 辐射漏失 RAYLEIGH-TAYLOR不稳定性
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整体式空腔靶制备工艺 被引量:17
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作者 黄燕华 郑永铭 +5 位作者 李秀琴 陆晓明 唐永建 周兰 罗青 袁光辉 《原子能科学技术》 EI CAS CSCD 北大核心 1999年第4期323-325,共3页
空腔靶是惯性约束聚变( I C F)研究中间接驱动靶的主要靶型之一,它由精密车削微加工工艺结合电镀工艺完成。
关键词 惯性约束聚变 空腔 微加工 电镀 驱动靶
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2ns,351nm激光黑腔靶受激Raman散射实验研究 被引量:11
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作者 王传珂 蒋小华 +5 位作者 刘慎业 况龙钰 王哲斌 刘永刚 李三伟 李文洪 《强激光与粒子束》 EI CAS CSCD 北大核心 2006年第7期1113-1116,共4页
介绍了在神光Ⅱ装置上开展的长脉冲2 ns,351 nm激光与黑腔靶相互作用的实验,报道了受激Raman散射光时间分辨谱图及能量测量的实验结果。长脉冲2 ns激光注入小腔靶(700μm×1 250μm)时,激光辐照缝靶产生的SRS光能量是激光与全腔... 介绍了在神光Ⅱ装置上开展的长脉冲2 ns,351 nm激光与黑腔靶相互作用的实验,报道了受激Raman散射光时间分辨谱图及能量测量的实验结果。长脉冲2 ns激光注入小腔靶(700μm×1 250μm)时,激光辐照缝靶产生的SRS光能量是激光与全腔靶作用产生的SRS光能量的1.3倍。在2 ns激光与不同尺寸黑腔靶作用的情况下,激光辐照小腔靶产生的SRS光能量比标准腔靶(800μm×1 350μm)产生的SRS光能量高1.6倍。由于激光功率密度下降,2 ns激光打靶SRS散射光要弱于短脉冲1 ns激光打靶,但持续时间稍长。实验结果表明:长脉冲2 ns激光与标准腔靶相互作用时,等离子体“堵腔效应”比较严重,标准腔靶尺寸不再合适。 展开更多
关键词 激光等离子体 受激Raman散射 腔靶 堵腔效应
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激光间接驱动惯性约束聚变二维总体程序——LARED集成程序 被引量:16
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作者 宋鹏 翟传磊 +20 位作者 李双贵 勇珩 齐进 杭旭登 杨容 成娟 曾清红 胡晓燕 王帅 施意 郑无敌 古培俊 邹士阳 李欣 赵益清 张桦森 张爱清 安恒斌 李敬宏 裴文兵 朱少平 《强激光与粒子束》 EI CAS CSCD 北大核心 2015年第3期54-60,共7页
介绍了辐射流体力学程序LARED集成程序的物理背景、模型方程、数值方法和数值算例。该程序主要应用于激光间接驱动惯性约束聚变的二维整体模拟,兼顾激光直接驱动、辐射驱动靶丸内爆过程和流体不稳定性等物理过程的数值模拟。通过与实验... 介绍了辐射流体力学程序LARED集成程序的物理背景、模型方程、数值方法和数值算例。该程序主要应用于激光间接驱动惯性约束聚变的二维整体模拟,兼顾激光直接驱动、辐射驱动靶丸内爆过程和流体不稳定性等物理过程的数值模拟。通过与实验数据、一维辐射流体力学程序进行比对,验证了程序的可靠性。该程序实现了多群输运建模下NIF点火靶的全过程数值模拟,并已应用于惯性约束聚变的物理研究。 展开更多
关键词 激光惯性约束聚变 LARED集成程序 黑腔 内爆 点火靶
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聚酰胺酸合成工艺研究 被引量:6
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作者 张占文 王朝阳 +4 位作者 钟发春 李波 余斌 魏胜 黄勇 《强激光与粒子束》 EI CAS CSCD 北大核心 2002年第2期261-264,共4页
采用超声波在线测量溶液粘度的方法 ,研究了合成聚酰胺酸过程中实验条件的影响 ,并对实验结果进行分析 ,由此确定了合成高分子量聚酰胺酸的最佳实验条件。研究表明 :在加料次序为先加二胺后加二酐 (二酐与二胺的摩尔比为 1 .0 1~ 1 .0 ... 采用超声波在线测量溶液粘度的方法 ,研究了合成聚酰胺酸过程中实验条件的影响 ,并对实验结果进行分析 ,由此确定了合成高分子量聚酰胺酸的最佳实验条件。研究表明 :在加料次序为先加二胺后加二酐 (二酐与二胺的摩尔比为 1 .0 1~ 1 .0 2 :1 )、试剂中含水量尽可能少 ,反应温度 0~ 5℃、反应时间以溶液粘度到达最大值为止的条件下 ,所合成的聚酰胺酸溶液粘度最大 ,可满足惯性约束聚变( ICF) 展开更多
关键词 柱腔充气靶 聚酰亚胺 聚酰胺酸 合成工艺 ICF 惯性约束聚变 端口膜
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再发射技术测量SGⅡ黑腔靶早期对称性 被引量:10
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作者 陈伯伦 蒋炜 +11 位作者 景龙飞 袁铮 黎航 余波 蒲昱东 苏明 晏骥 黄天晅 江少恩 刘慎业 杨家敏 丁永坤 《强激光与粒子束》 EI CAS CSCD 北大核心 2013年第2期385-388,共4页
利用再发射技术能够有效测量早期辐射驱动对称性。2011年在神光Ⅱ激光装置上,采用Bi替代靶,通过改变靶丸的支撑方式和优化探测器配置,利用分幅相机获得较高信噪比的Bi球表面再发射图像。利用实验结果获得了入射流不对称性P2分量随时间... 利用再发射技术能够有效测量早期辐射驱动对称性。2011年在神光Ⅱ激光装置上,采用Bi替代靶,通过改变靶丸的支撑方式和优化探测器配置,利用分幅相机获得较高信噪比的Bi球表面再发射图像。利用实验结果获得了入射流不对称性P2分量随时间的变化,对比两种腔长的黑腔,P2分量随时间的变化存在明显差别。两种腔P2分量随时间的变化趋势与采用视角因子模拟的结果基本一致。 展开更多
关键词 再发射 早期不对称性 P2分量 Bi替代靶
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旋转涂层法制备聚酰亚胺薄膜 被引量:12
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作者 张占文 唐永建 +4 位作者 李波 刘一杨 王朝阳 陈素芬 漆小波 《强激光与粒子束》 EI CAS CSCD 北大核心 2006年第7期1109-1112,共4页
研究了采用二酐和二胺合成聚酰胺酸溶液,利用旋转涂层法制备聚酰亚胺薄膜的方法并对成膜机理进行了初步探讨。研究表明:在固定旋转时间时,通过控制合成聚酰胺酸的浓度和旋转速度可基本上控制薄膜的厚度,旋转涂膜法制备的聚酰亚胺薄... 研究了采用二酐和二胺合成聚酰胺酸溶液,利用旋转涂层法制备聚酰亚胺薄膜的方法并对成膜机理进行了初步探讨。研究表明:在固定旋转时间时,通过控制合成聚酰胺酸的浓度和旋转速度可基本上控制薄膜的厚度,旋转涂膜法制备的聚酰亚胺薄膜厚度起伏小于5%,薄膜表面光洁度达到0.3~0.4nm,0.3μm厚聚酰亚胺薄膜的弹性模量为50~80MPa。 展开更多
关键词 柱腔充气靶 聚酰亚胺薄膜 旋转涂层
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点火黑腔二维模拟设计 被引量:8
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作者 李欣 吴畅书 +5 位作者 邹士阳 赵益清 李敬宏 古培俊 郑无敌 裴文兵 《计算物理》 CSCD 北大核心 2013年第3期371-378,共8页
基于二维激光靶耦合流体力学程序,研究设计惯性约束聚变间接驱动点火黑腔的方法.提出先调控X射线驱动温度再调控辐照均匀性的设计顺序.给出总激光功率(特别是主脉冲激光功率)的设计方法.模拟表明,填充气体密度的上限受到槽脉冲P2辐照不... 基于二维激光靶耦合流体力学程序,研究设计惯性约束聚变间接驱动点火黑腔的方法.提出先调控X射线驱动温度再调控辐照均匀性的设计顺序.给出总激光功率(特别是主脉冲激光功率)的设计方法.模拟表明,填充气体密度的上限受到槽脉冲P2辐照不均匀性的限制.另外,增加腔长可以抑制靶丸烧蚀层物质的膨胀.最后给出点火黑腔二维设计结果. 展开更多
关键词 间接驱动惯性约束聚变 点火靶黑腔 二维设计 激光传输
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