正电子产生靶上初级电子束半径的最小化研究

来源 :高能物理与核物理 | 被引量 : 0次 | 上传用户：zhqr1981

【摘要】

：

为获得尽可能高的正电子(e+)产额,严格控制初级电子 (e-)束在e+产生靶上的束半径是至关重要的. 首先分析了使e-束半径增大的各因素和对这些因素的制约;然后以北京正负电子对

【作者】

：

王书鸿王九庆叶强乐琪

【机构】

：

中国科学院高能物理研究所

【出处】

：

高能物理与核物理

【发表日期】

：

2004年期

【关键词】

：

正电子产额电子束半径

下载到本地 , 更方便阅读

下载此文赞助VIP

声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架

论文部分内容阅读

为获得尽可能高的正电子(e+)产额,严格控制初级电子 (e-)束在e+产生靶上的束半径是至关重要的. 首先分析了使e-束半径增大的各因素和对这些因素的制约;然后以北京正负电子对撞机(BEPC)的正电子源为例,给出了束半径的实测值和计算值的比较,以具体说明这些因素的影响;最后讨论了北京正负电子对撞机二期工程 (BEPC-Ⅱ)的相应优化设计研究,提出了获得靶上最小束半径的若干途径.

其他文献

The structure of blocks

In this paper, we focus on the structure of p-blocks with defect group satisfying some specialcondition. These special conditions include: two elements of the d

期刊

blockb-Brauer pairdefect groupconjugation

氢硼聚变三体级联衰变连续能谱的Monte-Carlo模拟与分析

11 B(p ,α1 ) 8Be (1 ) ( 2α)三体级联衰变中居间核8Be(1 ) 衰变成两个α粒子的连续能谱呈马鞍形分布 .编写了模拟三体级联衰变连续能谱的Monte Carlo程序 ,计算结果表明 :

期刊

Monte-Carlo模拟级联衰变各向异性分布

Atmospheric, hydrological and oceanic comprehensive contributions to seasonal polar wobble of Earth

The geophysical quantitative excitation on seasonal polar wobble of Earth Rotation has not been well achieved so far. The atmospheric, hydrologic and oceanic an

期刊

polar wobbleangular momentumEarth Rotation

Irregular sampling for multivariate band-limited functions

In this paper, we present some new algorithms to reconstruct multivariate band-limited functionsfrom irregular sampled values, which allow more arbitrary sampli

期刊

irregular samplingband-limited functionssampling theorems

通过味改变过程探测TC2理论中的中性toppion介子

在Topcolor辅助的Technicolor(TC2)模型下,研究了一个产生中性toppion 介子(Π0t)的味改变过程:e+e-→ttcΠ0t. 研究结果表明,在TESLA 对撞机上,当质心能量高时,在大多数参数

期刊

人工色模型顶色辅助的人工色(TC2)模型中性toppion介子电弱对称性破缺

Synthesizing monochromatic 3-D images by multiple-exposure rainbow holography with vertical area-par

We report for the first time the theoretical analysis and experimental results of a white-light reconstructed monochromatic 3-D image synthesizing tomograms by

期刊

multiple-exposure rainbow holographyholographic 3-D synthesisvertical-area par

Flexible organic light-emitting diodes with poly-3,4-ethylenedioxythiophene as transparent anode

The flexible oragnic light-emitting diodes (OLEDs) fabricated on poly-3,4-ethylenedioxythiophene/poly- styrenesulfonate (PEDOT/PSS) coated substrates were demon

期刊

PEDOToragnic light-emitting diodesflexible display

Finite-time performance analysis for genetic algorithms

Finite-time performance of genetic algorithm with elitist operator in finite solution space is studied, and the relationship between evolution generation and th

期刊

genetic algorithmfinite-time performanceearliest achieving time

Bond valence parameterslinearly dependent on the molybdenum oxidation states

Based on the available crystal data, a linear correlation between R0, the bond valence parameter for a Mo-containing chemical bond, and the Mo oxidation state n

期刊

bond valence parameterMo-O bondoxidation statevalence sum rule

The asymptotic distributions of sums of record values for distributions with lognormal-type tails

Let X1,X2,... be a sequence of i.i.d. random variables and let X(1),X(2),... be the associatedrecord value sequence. We focus on the asymptotic distributions of

期刊

limit distributionlognormalrecordregular variableslowly varying

正电子产生靶上初级电子束半径的最小化研究

与本文相关的学术论文