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Design and characterisation of the high-current DC breaker driven by explosive

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High Voltage 2023年第3期8卷 466-476页

作者： Cunwen Tang Hua Li Zhiquan Song jifei ye Meng Xu Xingguang Hu Fu Peng Institute of Plasma Physic s Hefei Institutes of Physical ScienceChinese Academy of SciencesHefeiChina 2University of Science and Technology of ChinaHefeiChina College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhenChina

The development of a high-current DC breaker is very important for the protection of the expensive superconducting magnet.A kind of an economic switch called pyrobreaker,which is driven by explosive detonation waves,has been used as the backup quench protection due to its inherent reliability and fast response.A prototype pyrobreaker with a special structure that can withstand and break 100 kA is *** numerical material model is taken to calculate the fracture demand of contact and the mass demand of ***,the detonation wave and contact breaking process are simulated by the ANSYS *** performance of the design and characterisation during dynamic breaking are compared with simulation and no-load experiment *** the end,the temperature rise test and the breaking test under 100 kA are completed *** results demonstrate that the design of 100 kA pyrobreaker is reliable.

关键词： breaking character high

Micro-impulse and plasma plume produced by irradiating aluminum target with nanosecond laser pulses in double-pulse scheme

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Plasma Science and Technology 2022年第7期24卷 82-89页

作者： Chenghao YU jifei ye Weijing ZHOU Hao CHANG Wei GUO State Key Laboratory of Laser Propulsion&Application Department of Aerospace and TechnologySpace Engineering UniversityBeijing 101416People's Republic of China

The micro-impulse generated by ablating an aluminum target in double-pulse laser bursts with different interpulse delays was investigated using a torsion *** plasma plume was simultaneously visualized using high-speed photography to analyze the coupling mechanism of the ablation *** experiment was carried out using a pulsed laser with a pulse width of 8 ns and a wavelength of 1064 *** experimental results show that an impulse with an interpulse delay of 60 ns is roughly 60%higher than that with no delay between the two pulses,when the energy of both laser pulses is 50 m ***,double-pulse schemes could enhance the ablation impulse under certain *** is because the ablation of the first laser pulse changes the optical properties of the aluminum target surface,increasing the ***,the ablation impulse is reduced with a time delay of 20 ns when the energy of both laser pulses is100 mJ or 150 *** can be concluded that the plasma produced by ablating the aluminum with the first pulse shields the second laser *** summarize,the experimental results show that different delay times in a double-pulse scheme have a significant effect on the ablation *** study provides a reference for the optimization of the parameters when laser ablation propulsion with a double-pulse scheme is applied in the fields of space debris removal,laser ablation thrusters,and so on.

关键词： laser ablation double pulse scheme impulse enhancement aluminum plasma plume fast photography

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激光微烧蚀固体靶材羽流流场演化特性

红外与激光工程 2013年第S1期42卷 47-51页

作者：叶继飞洪延姬装备学院激光推进及其应用国家重点实验室北京101416

激光微推进技术是激光推进技术的重要分支,其主要用于研制一种用于卫星姿轨控的激光微推力器。激光微烧蚀靶材形成的羽流流场演化特性及其所表征的力学性能是激光微推进技术研究的热点问题。针对激光微烧蚀靶材所形成羽流流场的特点,采... 详细信息

激光微推进技术是激光推进技术的重要分支,其主要用于研制一种用于卫星姿轨控的激光微推力器。激光微烧蚀靶材形成的羽流流场演化特性及其所表征的力学性能是激光微推进技术研究的热点问题。针对激光微烧蚀靶材所形成羽流流场的特点,采用纹影光学显示方法,实现了毫米尺度的带有自发光的激光烧蚀固体靶材微秒时间尺度的羽流流场观测。选取典型的聚合物材料作为靶材,分析了激光微烧蚀聚合物靶材的羽流演化特性,并对不同靶材获得的流场演化特征进行对比,结果表明:PVC材料更适合于作为激光微推进固体工质的选材。

关键词：激光推进工质纹影流动显示

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轴对称流场的彩色纹影密度场定量测量

红外与激光工程 2013年第12期42卷 3335-3338页

作者：叶继飞洪延姬装备学院激光推进及其应用国家重点实验室北京101416

实现定量测量是纹影技术发展的最新要求。制作一种彩色滤光片,代替传统"Z"字形纹影系统刀口,提出了一种能够定量测量轴对称流场密度场的纹影测量方法,提供了一种基于传统纹影装置的定性显示向定量测量探索的新途径。介绍了所提出的纹影... 详细信息

实现定量测量是纹影技术发展的最新要求。制作一种彩色滤光片,代替传统"Z"字形纹影系统刀口,提出了一种能够定量测量轴对称流场密度场的纹影测量方法,提供了一种基于传统纹影装置的定性显示向定量测量探索的新途径。介绍了所提出的纹影定量测量方法的基本原理、标定方法和典型装置,以轴对称自由射流为研究对象,构建了典型的实验系统,并基于理论分析与数值模拟结果,对所获得的实验结果进行了对比。结果表明:所提出的彩色纹影定量测量方法适合于轴对称流场的密度场定量测量。

关键词：流动显示流场诊断纹影刀口彩色滤光片

Impacts of laser pulse width and target thickness on laser micro-propulsion performance

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Plasma Science and Technology 2022年第10期24卷 113-126页

作者： Sibo WANG Bangdeng DU Baosheng DU Yongzan ZHENG Yanji HONG jifei ye Baoyu XING Chenglin LI Yonghao ZHANG State Key Laboratory of Laser Propulsion and Application Space Engineering UniversityBeijing 101416People's Republic of China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190People's Republic of China

In order to optimize the laser ablation performance of a micro-thruster with 1U dimensions,which employs a micro semiconductor laser,the impacts of pulse width and glycidyl azide polymer(GAP)thickness on thrust performance were *** results showed that with a GAP thickness of 200μm,the single-pulse impulse(I)increased gradually with the increase in the laser pulse width from 50 to 800μs,while the specific impulse(I_(sp)),impulse coupling coefficient(Cm)and ablation efficiency(η)all reached optimal values with a 200μs pulse *** is worth noting that the optimal pulse width is identical to the ignition delay *** Cmandηpeaked with a pulse width of 200μs,reaching 242.22μN W^(-1)and 35.4%,*** the increase in GAP thickness,I and Cmincreased *** of different thicknesses corresponded to different optimal laser pulse *** a certain laser pulse width,the optimal GAP thickness should be the most vertical thickness of the ablation pit,and the various propulsion performance parameters at this time were also *** the current laser parameters,the optimal GAP thickness was approximately 150μm,I_(sp)was approximately 322.22 s,andηwas approximately 34.94%.

关键词： laser micro-propulsion pulse width target thickness specific impulse ablation efficiency

Numerical Simulation on Laser Propulsion Capability of Polymer Target

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Optics and Photonics Journal 2013年第2期3卷 11-14页

作者： Nanlei Li jifei ye Weijing Zhou State Key Laboratory of Laser Propulsion and Application Academy of Equipment Huairou Beijing China

A computational model of laser ablated polymer was established. Set the ablation criterion based on threshold energy. Put forward the polymer ablation criterion in the numerical model. It established the energy distribution equation to describe the laser ablation process. When the ablation products ejected, the target gained recoil impulse from ejection process. Get the ejection energy and the recoil momentum of target based on momentum conservation law. The numerical analysis model can reflect the propulsion capability of different polymer propellant, revealed the law of propulsion parameters in laser ablation process.

关键词： Laser Propulsion Laser Ablation Polymer Target

外腔振荡式激光光子推进的推力放大特性仿真研究

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红外与激光工程 2017年第B12期46卷 36-42页

作者：黄钦叶继飞金星装备学院激光推进及其应用国家重点实验室北京101416

激光光子推进是利用激光产生的连续光子流在两面高反镜构成的振荡腔内往复振荡,通过光子与推力器多次动量交换循环利用光子流能量完成推力放大的一种全新的推进概念。文中分析了Gray和Edwards等人对于外腔振荡技术已进行的实验研究和结... 详细信息

激光光子推进是利用激光产生的连续光子流在两面高反镜构成的振荡腔内往复振荡,通过光子与推力器多次动量交换循环利用光子流能量完成推力放大的一种全新的推进概念。文中分析了Gray和Edwards等人对于外腔振荡技术已进行的实验研究和结果;阐述了推力产生机理并推导了推力计算方程;建立了推力器模型;最后,利用COMSOL有限元分析软件对振荡腔内的光子流进行准确追迹,研究振荡腔构型参数(腔镜距离、曲率、直径、相对偏转角、孔径位置)对推力放大特性的影响并进行了分析总结,对未来搭建实验平台提供了设计依据与理论指导。仿真结果表明:1 000 W激光在反射率0.999的高反镜构成的振荡腔内进行激光振荡最高可以实现功率放大61倍,产生409μN的微推力,满足空间任务的实际需求。

关键词：激光光子推进推力放大 COMSOL 微推力

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超短脉冲激光烧蚀冲量耦合测量方法

红外与激光工程 2017年第3期46卷 15-21页

作者：金星常浩叶继飞装备学院激光推进及其应用国家重点实验室北京101416

超短脉冲激光烧蚀靶材产生的冲量耦合效应在激光烧蚀微推力器、激光清除空间碎片等航天应用中有广泛的应用前景,而高精度的冲量测量方法是研究冲量耦合效应的必须手段。采用基于激光干涉法的扭摆系统测量激光烧蚀靶材产生的冲量,并构建... 详细信息

超短脉冲激光烧蚀靶材产生的冲量耦合效应在激光烧蚀微推力器、激光清除空间碎片等航天应用中有广泛的应用前景,而高精度的冲量测量方法是研究冲量耦合效应的必须手段。采用基于激光干涉法的扭摆系统测量激光烧蚀靶材产生的冲量,并构建测量系统。研究扭摆系统纵轴振动和初始误差角对冲量测量产生的影响,扭摆系统纵轴高频振动导致了激光干涉条纹间距出现不均匀现象;此外,扭摆初始误差角越大,明条纹出现时间将前移,条纹数目变大,导致测量系统精度不高。通过建立的附加高频振动和初始误差角的误差分析模型,提出了基于最小二乘法的实验数据分析方法,该方法能够有效滤除高频测量噪声,解决了冲量测量精度不高的问题,进一步完善了冲量测量方法。

关键词：冲量脉冲激光扭摆高频振动最小二乘法

脉冲微推力作用下的扭摆系统响应特性仿真分析

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红外与激光工程 2016年第A2期45卷 110-114页

作者：常浩叶继飞林正国装备学院激光推进及其应用国家重点实验室

激光烧蚀冲量耦合特性是激光清除空间碎片的基础,高精度的冲量测量方法是研究冲量耦合特性的必须手段。以扭摆系统测量激光烧蚀空间碎片产生的冲量为背景,分析扭摆法测量原理,得到脉冲力作用下的扭摆系统响应方程,为测量系统设计和实验... 详细信息

激光烧蚀冲量耦合特性是激光清除空间碎片的基础,高精度的冲量测量方法是研究冲量耦合特性的必须手段。以扭摆系统测量激光烧蚀空间碎片产生的冲量为背景,分析扭摆法测量原理,得到脉冲力作用下的扭摆系统响应方程,为测量系统设计和实验测量研究奠定基础。根据实际激光清除空间碎片过程中,激光以一定的重复频率作用空间碎片为前提,研究多脉冲力作用下的扭摆系统响应特性,得到的结论如下:在脉冲力作用下,系统响应曲线为正弦曲线,振动幅度衰减程度取决于阻尼比大小,曲线震荡幅度大小取决于脉冲力的冲量;当力的作用时间小于周期的1/8时,可认为是瞬间作用;瞬间作用时,尽管脉冲力数目不同,但总力矩相同情况下,扭摆系统响应效果基本一致;通过模型推导,系统模型误差与阻尼比、力的作用时间与系统周期比值有关。

关键词：扭摆系统推力多脉冲响应特性扭转角