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positron beam
相关语句
  正电子束
     Research for Crystallization of Metallic Glass Pd_(79.5)Ni_4Si_(16.5) by Slow Positron Beam
     金属玻璃Pd_(79.5)Ni_4Si_(16.5)结晶化过程的慢正电子束研究
短句来源
     DEFECT PROPERTIES OF THE La_(0.7)Sr_(0.3)MnO_3 EPITAXIAL FILMS STUDIED BY VARIABLE ENERGY POSITRON BEAM
     La_(0.7)Sr_(0.3)MnO_3外延膜缺陷性质的慢正电子束研究
短句来源
     Exploring of defects in He~+ implanted Si(100) by slow positron beam
     He~+注入Si(100)缺陷退火效应的慢正电子束研究
短句来源
     THERMODYNAMICAL BEHAVIOR OF 57 Fe IMPLANTED IN ZrO 2(Y) BY CEMS AND SLOW POSITRON BEAM
     CEMS和慢正电子束研究ZrO_2(Y)中Fe的热动力学行为
短句来源
     By using a variable energy positron beam system, the linear S parameter as a function of implantation positron energy was measured on the epitaxial La-{0.7}Sr-{0.3}MnO-3 thin-films from different deposition oxygen pressures.
     用单能慢正电子束 ,测量了不同氧分压下生长的La0 .7Sr0 .3MnO3外延膜的S参数与入射正电子能量E的关系 .
短句来源
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  正电子
     The Study of a-C: H(N) Films by Low Energy Positron Beam
     a-C:H(N)薄膜的慢正电子分析
短句来源
     EGS4 simulation for positron source on LINAC-based slow positron beam line
     基于LINAC慢正电子源的EGS4模拟
短句来源
     Six kinds of positron mobility measurement methods(angular correlation,Doppler drift,lifetime,implantation profile,diffusion constant and slow positron beam) are reviewed,measurement data since 1957 is analysed.
     综述了在半导体和金刚石中的正电子迁移率的6种不同测量方法(角关联方法、多普勒方法、寿命谱方法、注入剖面法、扩散常数法和慢正电子法),给出了自1957年以来国内外的所有测量数据,并对数据进行了综合分析
短句来源
     Performance study of the Beijing Intense Slow Positron Beam
     北京慢正电子强束流性能研究
短句来源
     In May of 1987, electron beam of 760 mA and 250 MeV was obtained and positron beam current of 2.5 mA and 99 MeV was observed when an electron beam of 785 mA and 150 MeV bombarding a tungsten target.
     以150MeV、785mA电子束打转换靶,获得能量99MeV、脉冲流强2.5mA的正电子.
短句来源
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  “positron beam”译为未确定词的双语例句
     Thermodynamic behavior of  ̄(57)Fe implanted into ZrO_2(Y)by CEMS and slow positron beam
     Thermodynamic behavior of ~(57)Fe implanted into ZrO_2(Y)by CEMS and slow positron beam
短句来源
     It was the first time that the defects in Bi_4Ti_3O_12 ferroelectric thin films were studied using a slow positron beam technique.
     晶粒均匀而且致密,呈不规则球柱状,晶粒清晰可辨,说明制备的Bi_4Ti_3O_12薄膜结晶情况良好。
短句来源
     Results show that the transmission efficiency of the transfer system is above 98% and the size of pulsed slow positron beam’s image got by the IP is less than 15 mm.
     实验结果表明,系统对于模拟电子的传输效率高于98%,电子束斑直径小于5mm。
短句来源
     Study on Lithium Fluoride Cluster-Based Nanophase Films by LowEnergy Positron Beam
     氟化锂团簇基纳米相薄膜的慢正电子研究
短句来源
     Diamond-Like Carbon Films by Low Energy Positron Beam
     类金刚石薄膜的慢正电子分析
短句来源
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  positron beam
We have utilized a variable energy positron beam and infrared transmission spectroscopy to study defects in GaAs epilayers grown at low temperatures (LT-GaAs) by molecular beam epitaxy.
      
Variable energy positron beam characterization of defects in as-grown and annealed low temperature grown GaAs
      
It was important to use raw samples, because we were examining the usefulness of the positron beam in technical applications where such samples could be available.
      
This paper presents the results of positron beam experiments performed on raw steel samples whose surfaces have been damaged during sliding contact in the conventional pin-on-disc tribotest.
      
Our studies have shown that the positron beam technique is a suitable tool for defect characterization in tribotested samples.
      
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The progress of BEPC in thc past 8 month is described. The main civilengineering construction of the collider machine will soon be finished. Nearly70% of the components of the linac have been installed in the tunnel. Its first 8sections with an energy of 250 MeV have commissioned. A positron beam with anencrgy 100 MeV and a curreent intensity of 2.5 mA were obtained. Except theceramic window of the Rf cavity which is still in R & D stage, more than 90%non-standard components have been delievered to our...

The progress of BEPC in thc past 8 month is described. The main civilengineering construction of the collider machine will soon be finished. Nearly70% of the components of the linac have been installed in the tunnel. Its first 8sections with an energy of 250 MeV have commissioned. A positron beam with anencrgy 100 MeV and a curreent intensity of 2.5 mA were obtained. Except theceramic window of the Rf cavity which is still in R & D stage, more than 90%non-standard components have been delievered to our institate. Testing is under-way. The installation of transport line was completed at the beginning of June,and the installation of the ring has startcd just now. The main parts of the con-trol system were established in our 1ab. The synchronous RAMP simulation wascompleted. The beam position monitor software is being debugged.

本文简要介绍了最近半年多来BEPC工程进展情况,对撞机主体部份有关的土建大部接近竣工,1.4GeV直线加速器的安装已完成70%以上。前端250兆电子伏区段已经进入调试阶段,并得到了正电子束,贮存环90%以上的非标设备均已完成,除高频腔尚需抓紧研制外,其余的均在进行单部件测试。输运线已于本月初全部安装完毕。环形部份的安装已开始,自控系统的主要部份已在实验室内建立,并发展了一套电源控制系统的软件,闭轨测量显示系统也正在调试,束测系统的部份探头已进入安装。

In this article, we describe an apparatus for producing a slow-positron beam by moderating the decay positrons from a radioactive source using a W-vane moderator. The integral energy spectrum of the slow-positrons was measured with a retarding field analyser. The results are compared with that obtained using a Ni + MgO moderator at the same apparatus.

本文介绍一台慢正电子束装置。在该装置上我们用W慢化体产生慢正电子,测量了慢正电子能谱,并和在该装置上用Ni+Mgo慢化体所得结果进行了比较。

The beam test of the 250 MeV section of BEPC 1.1/1.4 GeV e~(±) LINAC was performed four times during its installation phase. In May of 1987, electron beam of 760 mA and 250 MeV was obtained and positron beam current of 2.5 mA and 99 MeV was observed when an electron beam of 785 mA and 150 MeV bombarding a tungsten target. The main parameters of LINAC met the design values and achieved the same technical level of similar accelerators in other countries.

在北京正负电子对撞机(BEPC)1.1/1.4GeV电子直线加速器的安装阶段,对起始的250MeV段共安排了四次调束试验,1987年5月达到电子束脉冲流强760mA,能量为250MeV;以150MeV、785mA电子束打转换靶,获得能量99MeV、脉冲流强2.5mA的正电子.检验各项技术指标,都符合设计要求,达到国外同类加速器的水平.

 
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