三维可调式锥体上滚演示实验仪

对传统锥体上滚实验演示仪进行拓展和改进,研制了三维可调式锥体上滚演示实验仪,实现了轨道夹角、双轨道平面倾角及双圆锥体(直径与高度)的连续可调.     

对MJ—1型静电场实验仪的改进

本文介绍了对ＭＪ—ｌ型静电场实验仪的一种改进方法．改进后的仪器能直接记录电位线。     

基于分线器核信息共享平台的研究与应用

基于保真传输技术,研制了基于分线器的WG-1核信息共享实验仪,克服了2个主要问题:保真传输和反射波,实现了核信息共享,保证了实验信息的一致性.研制了两套实验样机,运行稳定,具有良好的可重复性和实用性.该核信息共享实验仪为核辐射探测实验提供了新型运行模式.     

波动演示实验仪的研制

对波动演示实验仪进行了研制。     

光电效应实验仪

针对传统光电效应实验仪的不足，设计研制一种新型光电效应实验仪，该仪器既能验证光电效应的基本规律，又能准确测定普朗克常量。     

风力发电实验仪

研制了风力发电实验仪,并利用该实验仪探究了风速、风机转速、发电机输出电动势之间关系,测量了风机的风能利用系数,展示了风力发电涉及的工程技术问题,即:在额定风速之下,采用追踪最佳叶尖速比的调节方法可最大限度利用风能;当风速超过额定风速,用变浆距调节方法可实现风力发电平稳输出.     

三维立体结构静电场描绘装置的设计和研究

目前关于静电场描绘实验的改进大多都局限于平面上,主要是在一维二维层面讨论,三维空间描绘的实验很少,仅有一些通过软件分析平面数据再拉伸成立体这方面的改进,不够直观。但是带电体周围的电场分布通常是三维空间的,为了让学生更直观的了解和研究静电场在空间中的分布,本实验以三维模块设计为核心,在静电场描绘中,三维模块主要由相关辅助部件构成,通过实验操作把非对称结构的三维静电场准确形象的定位且描绘出来。     

热辐射定律实验

量子力学和相对论是近代物理学的两大支柱。而黑体热辐射定律的研究对量子力学的创立起过特殊的作用。为了使学生对黑体辐射规律有直接的认识,我们研制了这套实验仪(暂定名:RF—1型热辐射定律实验仪),让学生方便地进行分组实验。     

气体放电等离子体参量诊断实验

为了让学生尽早了解科技前沿的知识,在国家教委教学仪器研究所的资助下,我们研制了静电探针诊断实验仪(该实验仪已于1990年通过了国家教委的鉴定)。连续三年在我校本科生中开设了“用静电探针诊断气体放电等离子体参量”的物理实验,具体测试出关于冷等离子体的密度、温度、振荡频率和德拜长度等几个重要的参量。     

几种演示影响刚体滚动因素的物理实验仪

改进和研制了几种演示刚体平面平行运动(滚动)的物理实验仪,突出演示了转动惯量、滚动半径、刚体质量等因素对运动的影响．仪器结构简单,构思巧妙,演示效果良好．     

基于OpenGL的三维电场线模拟

在Visual C＋＋环境下,设计了一种基于OpenGL的三维电场线模拟软件。该软件采用微分方程法来生成电场线,可以准确地模拟不同观察视角下,静止点电荷的三维电场线。用户可以拖动鼠标随意转动观察视角,并可随意设置电荷个数、分布以及大小。     

一种新型模拟静电场描绘仪

本文介绍了一种新型模拟静电场描绘仪 ,利用它能精确地描绘出几种模拟静电场。     

复合场下优化产生粒子对能量分布宽度的特性研究

采用计算量子场论的方法,对振荡场加稳恒场的组合外场下真空中正反粒子对的产生特性进行了研究.通过一系列的对比得到当振荡场的宽度减小时,一方面可增加正反粒子对的产生量,另一方面也可减小正反粒子对的能量分布宽度从而得到能量单一性更好的粒子对.同时,通过分析产生量、能量分布宽度与振荡场宽度的关系可得出,仅在一定范围内减小振荡场的宽度可使能量分布更加集中,则能量分布宽度趋于某个极限值.因此,要得到产生量多且能量分布集中的正反粒子对应选择合适的参数,这可为今后的实验设计提供数据参考.     

Ab initio linear scaling response theory: electric polarizability by perturbed projection

A linear scaling method for calculation of the static ab initio response within self-consistent field theory is developed and applied to the calculation of the static electric polarizability. The method is based on the density matrix perturbation theory [Phys. Rev. Lett. 92, 193001 (2004)]], obtaining response functions directly via a perturbative approach to spectral projection. The accuracy and efficiency of the linear scaling method is demonstrated for a series of three-dimensional water clusters at the RHF/6-31G(**) level of theory. The locality of the response under a global electric field perturbation is numerically demonstrated by the approximate exponential decay of derivative density matrix elements.     

Electronic structure of GaAs/AlGaAs quantum double rings in lateral electric field

A three-dimensional model of GaAs/A1GaAs quantum double rings in the lateral static electric field is investigated theoretically.The eigenvalue problem with the effective-mass approximation is solved by means of the finite-element method.The energy levels and wave functions of quantum-confined electrons and heavy holes are obtained and show an agreement with our previous theoretical and experimental studies.It is shown in the approximation of neglecting the Coulomb attraction between the electron and heavy hole that a relatively large Stark shift of exciton emission of 4 meV is attainable with an applied electric field of 0.7 kV/cm.     

外加静电场的聚焦激光脉冲真空加速电子方案

采用五阶修正的聚焦激光光场方程模拟研究了由Singh提出的在电子和激光脉冲作用尾部阶段施加外场的加速方案,将Singh方案中采用的外加磁场改成了外加电场,并且考虑了光束的纵向电场和光束衍射效应.模拟结果显示,电子可以从加速相位阶段被外场导入下一个加速相位阶段而不进入减速相位阶段,因此电子能获得比不加外场方案更高的净能增益. 关键词： 强激光 激光加速     

基于Matlab的点电荷系中的静电场三维可视化研究

基于Matlab提出了一种点电荷系电场强度和电势的三维可视化方法,使得对于点电荷系电场能够得到更加直观的认知,为点电荷系静电场的研究和教学提供了一种新方法。     

Stabilization of Drift Instabilities of an Inhomogeneous Plasma by Means of an RF Electric Field

The possibility of stabilizing effects that an rf electric field imposes on drift instabilities in an inhomogeneous plasma is investigated. A two-species, nonisothermal plasma, situated in an externally applied static magnetic field is considered with the rf electric field applied in the same direction as the dc magnetic field. The plasma is "mildly" inhomogeneous in density, with a density gradient perpendicular to the confining magnetic field. Using a hydrodynamic model for the plasma it is found that under certain conditions an increase in the frequency of the drift oscillations is obtained as the result of the application of the rf electric field. The increase in the frequency of the drift oscillations results in an increase in the magnitude of the stabilizing term associated with Landau damping which in turn yields a smaller growth rate for the drift instability. Discussions of the state of the plasma for different values of the frequency of the applied electric field are presented and the feasible ranges of values of the above quantity required for stabilization are determined. It is concluded that the resulting stabilization is significant only in a very narrow rf band. Therefore, the application of this technique appears to be a difficult experimental undertaking.     

Holographic storage of three-dimensional image and data using photopolymer and polymer dispersed liquid crystal films

We present holographic storage of three-dimensional(3D) images and data in a photopolymer film without any applied electric field.Its absorption and diffraction efficiency are measured,and reflective analog hologram of real object and image of digital information are recorded in the films.The photopolymer is compared with polymer dispersed liquid crystals as holographic materials.Besides holographic diffraction efficiency of the former is little lower than that of the latter,this work demonstrates that the photopolymer is more suitable for analog hologram and big data permanent storage because of its high definition and no need of high voltage electric field.Therefore,our study proposes a potential holographic storage material to apply in large size static 3D holographic displays,including analog hologram displays,digital hologram prints,and holographic disks.     

静电场描绘仪的改进

本文主要介绍一种改进后的静电场描绘仪,利用它能精确、快捷地描绘出同轴电缆的静电场分布。