LF－11~＃激光器升级倍频系统多层膜A：减反射膜

固体激光器装置升级扩展对薄膜研制提出了严重挑战。相互矛盾的各种技术指标必须匹配。就损耗、激光损伤阈值、光学技术指标和长期稳定性来讲，淀积工艺和镀膜材料的选取是至关重要的。特别地，ＬＦ一１１￣＃固体激光器升级对光学薄膜提出了许多新的性能要求。我们研制了ＬＦ一１１￣＃激光器升级所用各种薄膜元件。现分两部分讨论各种膜系研制情况。第一部分就是这篇论文所涉及的ＢＫ７玻璃，熔石英玻璃材料上的单波长，倍频双波长，二倍频、三倍频三波长减反射膜的研制。给出了膜系设计，淀积试验，光谱性能测试和激光损伤实验结果。     

LF—11^#激光器升级倍频系统多层膜A：减反射膜

固体激光器装置升级扩展对薄膜研制提出了严重挑战。相互矛盾的各种技术指标必须匹配。就损耗、激光损伤阈值、光学技术指标和长期稳定性来讲，淀积工艺和镀膜材料的选取是至关重要的。特别地，ＬＦ一１１￣＃固体激光器升级对光学薄膜提出了许多新的性能要求。我们研制了ＬＦ一１１￣＃激光器升级所用各种薄膜元件。现分两部分讨论各种膜系研制情况。第一部分就是这篇论文所涉及的ＢＫ７玻璃，熔石英玻璃材料上的单波长，倍频双波长，二倍频、三倍频三波长减反射膜的研制。给出了膜系设计，淀积试验，光谱性能测试和激光损伤实验结果。     

SSRF储存环流入薄切割磁铁样机的设计和研制

基于上海同步辐射装置（SSRF）储存环注入系统的需要，在国内首次研制成功了一台涡流板型切割磁铁，其性能指标均达到设计要求，特别是漏场指标，达到了国际同类磁铁的先进水平，本文对切割磁铁设计和研制的关键技术进行了讨论，对切割磁铁的性能进行了测试，在此基础上对这类切割磁场的设计和研制提出具有建设性的建议。     

SPTMB－1型水平天幕靶研制过程中的几个问题

本文介绍了水平天幕靶研制中光学系统结构以及电路的组成，分析了它的结构特点和基本功能，提出了战技指标，并紧紧围绕其战技指标开展研制工作，最后经过鉴定试验和仿真证明ＳＰＴＭＢ－１研制是成功的。     

用普通物理眼光看立体声音响系统

本文用波动方程对立体声系统的研制进行了分析，对物理教学内容的改革进行了尝试，收到了较好的教学效果。     

用三坐标测量机调整掠入射光栅谱仪

用三坐标测量机调整掠入射光栅谱仪是我们在研制掠入射光栅谱仪中采用的新方法．我们用这种方法研制了一台曲率半径为１ｍ的光栅谱仪，在２—３２ｎｍ波段范围内，谱线分辨达０．００５ｎｍ，与通常采用的用光源摄谱调整光栅谱仪的方法相比，节省了人力、物力，缩短了研制周期．     

FeS2和CoS2在长寿命热电池中的性能比较

长寿命热电池研制的关键技术之一是阴极材料的确定，在长寿命热电池的研制中，选择并制备了两种阴极材料二硫化铁和二硫化钴。从单体电池实验和电池组实验方面分别对两种阴极材料的电化学性能进行比较。     

导电复合材料的研制

为了适应Z-pinch物理实验对新材料的要求，2003年来对导电复合材料进行了初步研制。由于导电聚合物结构的特殊性，导致了导电聚合物机械加工性能很差，聚吡咯是一种具有较好的热、化学氧化和光照稳定性导电聚合物，因此利用有机材料作为基体，吸附吡咯同时进行氧化聚合，可得到性能较好导电复合材料。在导电聚合物的研制过程中，主要涉及基体材料的选择、氧化剂的选择以及反应时间对复合材料的表面电阻的影响。     

像增强器噪声频谱特性测试技术研究

对一台进口的像增强器信噪比（SNR）测试仪进行履行，重新研制和设计了测试仪的信号处理模块、计算机系统和测试软件，采用硬件滤波、软件数字滤波和快速傅里叶变换（FFT）相结合的方法实现了像增强器噪声的频谱特性测试。利用所研制的测试仪对多种型号的进口和国产像增强器的噪声频谱进行了测试分析，并给出了分析测试结果。     

Z-pinch装置轴向绝缘堆的设计和分析方法

 通过分析比较国外Z-pinch装置轴向绝缘堆的设计，对轴向绝缘堆设计中的关键问题进行了归纳与总结。在总体描述绝缘堆研制方法和思路的基础上，详细论述了静电场数值模拟、电感参数计算和电路模拟、闪络概率计算、结构稳定性力学分析以及材料选择等绝缘堆研制中的几个关键问题，并对闪络概率分析方法的完善和拓展应用进行了讨论。     

Calculation of phonon life time in amorphous solids

We present the calculation of phonon life time at low frequencies in an amorphous solid, which is assumed to be characterized by an elasticity that exhibits spatial fluctuation. Thermodynamic Green’s function method is used to compute phonon self-energy, and an iterative method is devised to obtain an improvement upon the first order perturbation calculation. The elasticity correlation is taken to be an exponentially falling function of distance. We obtain an inverse life time that varies as the fourth power of phonon frequency for small values of the latter, and whose frequency-dependence becomes weaker and weaker as the frequency increases.     

Isolated ultrashort attosecond pulse generation from a coherent superposition state in a few-cycle chirped laser pulse

We theoretically demonstrate an efficient method for producing an isolated ultrashort attosecond pulse by high-order harmonic generation in an intense few-cycle chirped laser pulse. Our simulation calculations show that the harmonic spectrum reveals an ultrabroad extreme ultraviolet supercontinuum when the initial state is prepared in a coherent superposition of the ground and first excited states. It is also shown that the method can enhance the short quantum path and eliminate the long one, and then an isolated 23-attosecond pulse is produced. By properly adjusting the chirp parameter, a clean single attosecond pulse as short as 11 attoseconds is directly obtained.     

Universal Groups of Effect Spaces

Various axiomatic models for unsharp quantum measurements are investigated. These include effect spaces (E-spaces), effect test spaces (E-test spaces), effect algebras, and test groups. It is shown that a test group G is the universal group of an E-test space if and only if G is strongly atomistic. It follows that if G is strongly atomistic, then G is an interpolation group. We then demonstrate that if G is an interpolation group, then G is the universal group of an E-space. Finally, it is shown that an E-space is isomorphic to an E-test space if and only if it is strongly atomistic.     

Generalized tensor ABCD law for an elliptical Gaussian beam passing through an astigmatic optical system in turbulent atmosphere

The propagation of an elliptical Gaussian beam (EGB) through an astigmatic ABCD optical system in a turbulent atmosphere is investigated. An analytical formula for the average intensity of an EGB and a generalized tensor ABCD law for the generalized complex curvature tensor are derived. As an application example, we derived an analytical formula for the average intensity of an elliptical flat-topped beam propagating through an astigmatic ABCD optical system in a turbulent atmosphere. As a numerical example, the focusing properties of an EGB focused by a thin lens in a turbulent atmosphere are studied. It is found that the focused beam at the focal plane becomes a circular Gaussian beam when the atmospheric turbulence is strong enough, and the beam width of the circular Gaussian beam is determined by atmospheric turbulence strength, focal length of the thin lens, and wavelength of the initial beam but is independent of the initial beam widths (i.e., initial intensity distribution).     

Anisotropic Bianchi-I universe with phantom field and cosmological constant

We study an anisotropic Bianchi-I universe in the presence of a phantom field and a cosmological constant. Cosmological solutions are obtained when the kinetic energy of the phantom field is of the order of anisotropy and dominates over the potential energy of the field. The anisotropy of the universe decreases and the universe transits to an isotropic flat FRW universe accommodating the present acceleration. A class of new cosmological solutions is obtained for an anisotropic universe in case an initial anisotropy exists which is bigger than the value determined by the parameter of the kinetic part of the field. Later, an autonomous system of equations for an axially symmetric Bianchi-I universe with phantom field in an exponential potential is studied. We discuss the stability of the cosmological solutions.      

一种光电成像系统调制传递函数的测量方法

调制传递函数(MTF)是设计和评价光电成像系统的重要参数,在证明了边缘图像的边缘扩展函数与累积直方图逆函数存在着线性关系的基础上,提出了一种基于统计直方图的MTF测量方法,设计了包括光学系统和探测器的仿真实验,搭建了包括积分球、靶标、平行光管和数字摄像机等装置的物理实验平台,以光电成像系统的设计参数和理论模型得到的理论...     

A note on reflection of spherical waves

In 1909 Sommerfeld gave an exact solution for the reflection of a spherical wave from a plane surface in terms of an oscillatory integral and also presented an asymptotic solution for the case where both source and receiver are at the boundary. Weyl (1919) presented an alternative solution and also an asymptotic solution for the case where the source is at the boundary. It is known that the general case is solved if a general solution for the case where the source is at the boundary is known. Here it is demonstrated that it is sufficient to have the general solution for the case where both source and receiver are at the boundary. This is mainly of theoretical interest, but may have practical applications. As an example it is demonstrated that Sommerfeld's approximate solution gives Ingard's (1951) approximate solution which is valid for arbitrary source and receiver heights.     

Smoothing of an atomically rough vicinal surface – STM observation and MC simulation

Smoothing of an atomically rough vicinal surface of SrTiO₃ is studied by scanning tunneling microscope (STM) observation and by Monte Carlo (MC) simulation. A complex step pattern that resembles a two-dimensional phase separation pattern is observed on the surface. Analysis of the step pattern during annealing obtained by the STM in comparison with the MC simulation reveals an asymmetry of the relaxation pattern between islands and holes. The asymmetry is attributed to the difference of the mobility of an adatom and an atomic hole, and the asymmetry is enhanced by the step edge diffusion barrier. Values of an effective bond energy and an effective diffusion barrier as well as the surface diffusion coefficient are deduced from the relaxation pattern.     

An intense terahertz radiation source at the Compact ERL

The Compact ERL is an energy recovery LINAC (ERL) test facility that is planned for KEK. The circumference of the recirculation path will be 70 m. Initially, the beam energy will be about 65 MeV and the current about 10 mA. Although the primary purpose of the machine is to aid the development of the key technologies that are essential for building an ultra-brilliant new synchrotron light source based on an ERL, the Compact ERL itself has great potential as an intense source of terahertz radiation. To generate the intense terahertz radiation, an electron bunch of a very short bunch length is required and bunch compression is inevitable. We discuss the parameters of the Compact ERL, present the results of a simulation of bunch compression, and make an estimate of the generated coherent synchrotron radiation.     

带虚设层的抗反射结构导模共振滤波器设计与分析

提出带虚设层的抗反射导模共振滤波器结构及设计方法,该方法适用于任意角度入射带虚设层的抗反射结构导模共振滤波器设计与分析.得到带虚设层的导模共振滤波器抗反射结构所满足的关系式.指出在维持虚设层光学厚度不变的情况下,可以通过不同选材,在低反射旁带中实现等带宽不同波长的选择.此外,由于结构的抗反射特性在低角范围内具有较大的角度容差,改变入射角,可以实现滤波波长及光谱带宽在宽光谱范围内的准线性可调谐.