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金属Pd薄膜的超临界流体沉积制备及其结构表征

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物理学报 2011年第8期60卷 723-729页

作者：王燕磊张占文李波江波四川大学化学学院成都610064 中国工程物理研究院激光聚变研究中心高温高密度等离子体物理国防科技重点实验室绵阳621900

用超临界流体化学沉积法以有机金属化合物为前驱物制备金属单质薄膜.超临界CO2.溶剂,六氟乙酰丙酮钯(Pd(Ⅱ)(hfac)2.为前驱物,在温度为100℃、压力为12.18MPa、反应时间为10—2.h的条件下,经过H2.催化还原在单晶Si片上制备金属Pd薄膜... 详细信息

用超临界流体化学沉积法以有机金属化合物为前驱物制备金属单质薄膜.超临界CO2.溶剂,六氟乙酰丙酮钯(Pd(Ⅱ)(hfac)2.为前驱物,在温度为100℃、压力为12.18MPa、反应时间为10—2.h的条件下,经过H2.催化还原在单晶Si片上制备金属Pd薄膜,薄膜均匀且连续,厚度为0.3—1.5μm.经X射线光电子能谱和X射线衍射谱分析可知,沉积的薄膜为金属Pd单质晶体结构.扫描电子显微镜研究结果表明,沉积压力对薄膜的晶粒尺寸有很大的影响.当沉积压力为12.Pa时,得到的薄膜晶粒尺寸为30—60nm;当压力为15MPa时,得到的薄膜晶粒尺寸为90—12.nm;当压力为18MPa时,得到的薄膜晶粒尺寸为150—180nm.在温度一定的条件下,压力越大,晶粒尺寸越大.利用相同的沉积条件,在内径约为0.6mm,长度约为1mm的相对封闭金柱腔内表面沉积得到Pd薄膜.

关键词：超临界流体沉积金属Pd薄膜 H2. 柱腔

Surface quality of large KDP crystal fabricated by single-point diamond turning

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Surface quality of large KDP crystal fabricated by single-po...

2.d International Symposium on Advanced Optical Manufacturing and Testing Technologies

作者： Hou Jing Zhang Jianfeng Chen Jinlin Zhang Xiaoli Hu Dezhi ( research center of {2. fusion CAEP P.O Box919-987 mianyang 62.900 china )

＜正＞Ptassium dihydrogen phosphate （KDP） crystals are used as key components in high power density solid-state laser for Inertial Confinement fusion. Surface quality is an important factor for KDP crystals implemented in high power lasers. At present Single Point Diamond Turning（SPDT） is the only way to get the required transmitted wavefront and damage threshold KDP. The paper introduces something about the defects of KDP crystals fabricating and analyses some reasons. Based on the analysis of the reasons, the process parameters can be adjusted to meet the critical requirements of high energy density application. A piece of 32.×32. mm2.KDP is acquired. The roughness of the 32.×32. mm2.crystal surface was already to reach an rms about 5 nm. Data were measured by an interferometric microscope. The wavefront p-v is lower than 0.5λ（λ=632.m）.

关键词： KDP crystal SPDT the defect

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电子关联效应对金离子的影响

物理学报 2011年第10期60卷 197-202页

作者：胡峰杨家敏王传珂张继彦蒋刚朱正和中国工程物理研究院激光聚变中心绵阳629100 四川大学原子与分子物理研究所成都610065

运用多组态Dirac-Fock(MCDF)方法,考虑不同的电子关联效应,详细地研究了类Li,类Be,类B,类Na,类Mg,类Al,类Cu,类Zn,以及类Ga金离子的特性.结果表明,考虑价电子与原子实的电子相互作用,其结果更加符合实验和其他理论结果.

关键词：电子关联效应能级波长

Theoretical analysis of radiation-balanced double clad fiber laser

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Optoelectronics Letters 2005年第3期 18-20页

作者： CHEN Ji-xin~(1,2.*), SUI Zhan~2. CHEN Fu-shen~1, LI Ming-zhong~2. and WANG Jian-jun~2..Key Lab of Optical Fiber,School of Communication and Information Engineering,University of Electronic Science and Technology,Chengdu 610054,china2.research {2. of laser fusion,china Academy of Engineering Physics,mianyang 62.900,china

In this letter,a theoretical model of radiation-balanced double clad fiber laser is *** characteristic of the laser with Yb doped double clad fiber is analyzed *** is concluded that high output laser power can be obtained by selecting output coupling mirror with lower reflectivity,improving Yb doped concentration and choosing fiber length. This result can help us to design radiation balanced fiber laser.

关键词： Theoretical analysis of radiation-balanced double clad fiber laser length

Single order soft X-ray diffraction with quasi-random radius pinhole array spectroscopic photon sieves

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Chinese Physics B 2014年第4期23卷 342-346页

作者：张强强魏来杨祖华钱凤范全平张博谷渝秋曹磊峰 research center of {2. fusion China Academy of Engineering Physics

A novel single order diffraction grating in the soft X-ray region, called quasi-random radius pinhole array spectro- scopic photon sieves （QRSPS）, is proposed in this paper. This new grating is composed of pinholes on a substrate, whose radii are quasi-random, while their centers are regular. Analysis proves that its transmittance function across the grating bar is similar to that of sinusoidal transmission gratings. Simulation results show that the QRSPS can suppress higher-order diffraction effectively. And the QRSPS would still retain its characteristic of single order diffraction when we take the effect of X-ray penetration into account. These properties indicate that the QRSPS can be used in the soft X-ray spectra measurement.

关键词： diffraction properties diffraction gratings soft X-rays single-order diffraction

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寻找激光系统中离轴鬼点和鬼线的矩阵方法

中国激光 2003年第11期30卷 989-992页

作者：冯国英陈建国曹冲张小民景峰朱启华四川大学电子信息学院四川成都610064 中国工程物理研究院激光聚变研究中心四川绵阳621900

在实际的高功率激光系统中 ,当光学元件非共轴放置、光学元件有像散特性、光束倾斜入射时 ,系统中会出现许多离轴的鬼点 ,鬼点也可能变为鬼线。采用 4× 4光学矩阵 ,给出了计算高功率激光装置中的任意n阶离轴鬼点或鬼线的方法。

关键词：非线性光学鬼点和鬼线高功率激光系统离轴鬼点矩阵光学

An improved deconvolution method for X-ray coded imaging in inertial confinement fusion

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Chinese Physics B 2013年第10期22卷 281-286页

作者：赵宗清何卫华王剑郝轶丹曹磊峰谷渝秋张保汉 Science and Technology on Plasma Physics Laboratory laser fusion {2. center China Academy of Engineering Physics

In inertial confinement fusion （ICF）, X-ray coded imaging is considered as the most potential means to diagnose the compressed core. The traditional Richardson-Lucy （RL） method has a strong ability to deblur the image where the noise follows the Poisson distribution. However, it always suffers from over-fitting and noise amplification, especially when the signal-to-noise ratio of image is relatively low. In this paper, we propose an improved deconvolution method for X-ray coded imaging. We model the image data as a set of independent Gaussian distributions and derive the iterative solution with a maximum-likelihood scheme. The experimental results on X-ray coded imaging data demonstrate that this method is superior to the RL method in terms of anti-overfitting and noise suppression.

关键词： inertial confinement fusion coded imaging deconvolution Gaussian distribution maximum-likelihood

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纳秒激光在K9玻璃中聚焦的损伤形貌研究

物理学报 2008年第9期57卷 5558-5564页

作者：韩敬华冯国英杨李茗张秋慧谢旭东朱启华周寿桓四川大学电子信息学院成都610064 中国工程物理研究院激光聚变研究中心绵阳621900

详细研究了纳秒激光脉冲在K9玻璃内部产生损伤的形貌特点.整个损伤形貌是前端较大、后端逐渐减小,呈纺锤形.损伤区可分为四种类型的损伤形貌:损伤点轴向的丝状等离子通道、熔化区域、裂纹区域和裂纹末端的折射率变化区域.给出了激光脉... 详细信息

详细研究了纳秒激光脉冲在K9玻璃内部产生损伤的形貌特点.整个损伤形貌是前端较大、后端逐渐减小,呈纺锤形.损伤区可分为四种类型的损伤形貌:损伤点轴向的丝状等离子通道、熔化区域、裂纹区域和裂纹末端的折射率变化区域.给出了激光脉冲能量在空间的沉积函数和冲击波膨胀压强的表达式,并根据压强的空间分布特点对相应的损伤形貌进行了分析,理论分析与实验结果相符.

关键词：激光损伤形貌移动损伤模型冲击波激光能量沉积

Improvement of laser damage thresholds of fused silica by ultrasonic-assisted hydrofluoric acid etching

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Chinese Physics B 2017年第11期26卷 510-514页

作者：李源严鸿维杨科姚彩珍王志强闫春燕邹鑫书袁晓东杨李茗巨新 University of Science and Technology Beijing Department of Physics china Academy of Engineering Physics Laser Fusion Research Center Fine Optical Engineering research center

Polished fused silica samples were etched for different durations by using hydrofluoric（HF） acid solution with HF concentrations in an ultrasonic field. Surface and subsurface polishing residues and molecular structure parameters before and after the etching process were characterized by using a fluorescence microscope and infrared（IR） spectrometer, respectively. The laser induced damage thresholds（LIDTs） of the samples were measured by using pulsed nanosecond laser with wavelength of 355 nm. The results showed that surface and subsurface polishing residues can be effectively reduced by the acid etching process, and the LIDTs of fused silica are significantly improved. The etching effects increased with the increase of the HF concentration from 5 wt.% to 40 wt.%. The amount of polishing residues decreased with the increase of the etching duration and then kept stable. Simultaneously, with the increase of the etching time, the mechanical strength and molecular structure were improved.

关键词： HF etching fused silica laser induced damage threshold infrared spectra