共查询到17条相似文献,搜索用时 125 毫秒
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电子束辐照冲量的数值计算与实验的对比 总被引:1,自引:0,他引:1
利用Monte-Carlo方法模拟了电子在材料中的输运方程,得到了材料中电子的能量沉积剖面,同时结合弹塑性流体力学方程组,对“闪光二号”脉冲电子束发生装置产生的电子束与Ly-12铝相互作用的热-力学效应逐炮进行了数值计算,着重研究了喷射冲量及质量亏损,并与实验测试结果进行了对比。 相似文献
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为了获得高能紫外激光输出,开展了电子束泵浦XeCl准分子激光技术研究。详细介绍了四向电子束泵浦准分子激光装置的工作原理和结构特征,简述Marx发生器的放电电压、放电电流,激光气室中的沉积能量,激光脉冲能量、脉宽等参数的测量方法;研究了电子束泵浦XeCl准分子激光输出特性,得到了激光脉冲能量随激光气室内混合气体气压变化的规律,当激光器的充电电压为81kV时,获得了能量100J、脉宽200ns的XeCl准分子激光输出,其本征效率约为3.2%。并且开展了XeCl准分子激光辐照涂层材料力学特性研究,采用微型红外通光冲量探头测量不同条件下激光辐照涂层材料的冲量耦合系数,在常压空气环境中的冲量耦合系数约为8.32×10-5 N·W-1。 相似文献
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电子束辐照效应的数值模拟 总被引:3,自引:0,他引:3
论述了电子束辐照材料时的能量沉积Monte-Carlo计算,在此基础上,与弹塑性流体力学方程组相结合,给出电子束激发的热一力学效应的数值模拟方法.对一系列电子束打铝靶实验进行了实际计算,得到与实验比较一致的结果. 相似文献
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Sublimation energy is the latent heat of phase transition from sohd state directly to gas state, but it is difficult to measure experimentally. We propose a new method to determine the sublimation energy of materials by using the experimental data of blow-off impulse induced by electron beam and the computer program DRAM. With th& new method, the sublimation energy of polyester is finally determined to be about 1.1 k Jig. 相似文献
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介绍了在“闪光二号”脉冲电子束加速器上采用PVDF压电传感技术测量编织材料等的电子束热激波传播特性的情况。实验得出:(1)在能注量为90~210 J/cm2范围内,对4 mm厚的编织材料及其叠层材料,热激波应力峰值σa<0.1 GPa,只有硬铝的十几分之一;(2)编织材料中的热激波作用时间被明显展宽,其平均值达2.6 μs,是硬铝中的7倍多。实验结果表明:(1)编织材料具有良好的衰减和展宽热激波的性能;(2)对编织材料等的宽作用时间热激波测量来说,PVDF压电传感技术具有极其优越的性质。 相似文献
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《中国物理快报》2016,(2)
The resonance behaviors of local surface plasmon resonance in Au monomer and dimer are characterized systemically by electron energy loss spectroscopy in a scanning transmission electron microscope.The measured absorption range is about 20 nm larger than the physical size of the Au nanoparticles and the resonance peak energy shows a red shift when the electron beam passes off the nanoparticles.The Au dimer displays similar behaviors.Numerical simulation also reproduces those experimental results. 相似文献
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The electron-optical system (EOS) of an induction accelerator for generation of an electron beam with an energy of 2 MeV, a current of 2 kA, an impulse duration of 2 × 10?7 s, and a geometric output emittance not exceeding the thermal value of it is described. The EOS consists of two parts. The first part is a diode gun with a perveance of 2 × 10?6 A/B3/2 and a cathode-anode voltage of 1 MeV. The second part is an accelerating tube with uniform distribution of the same accelerating voltage. A beam is transported at a distance of about 4 m from the cathode and focused on a spot with a diameter of about 1 mm. The compliance tests results of the linear-induction accelerator precisely conform to the calculated design parameters. 相似文献