电子束

This is the most common form of EB affecting approximately 65% of people with EB in the UK.

这是最常见的形式的电子束影响到大约65 ％的人与电子束在英国。

The deflection system of an electron beam lithography tool is used to control deflection scanning of electron beam.

电子束曝光机的偏转系统控制电子束偏转扫描。

Dissector operation is based on the principle of electronic emission, where the image incident on the photosensitive surface produces an electron beam whose cross section is roughly the same as the geometry of the tube surface.

解析器是根据电子发射的原理操作的，图像入射在感光面上产生电子束，电子束的交叉部分大致与晶体管表面的几何结构一样。

Using a simple analytical model equilibrium, the dependence of tokamak edge safetyf actor qedge which can be understood as q~ for a limiter device or q95 for a divertor device, and the shear value are calculated and compared with the ITR~recommended formula.

重点讨论了适合于磁约束核聚变实验装置第一壁上W／Cu复合材料连接的几种方法：电子束焊、钎焊、热等静压连接、烧结熔渗法、等离子体喷涂法，并列举了第一壁材料与热沉材料成功连接时电子束辐照热负荷实验的情况。

The electron "gun" which produces the electrons is equivalent to the light source of the optical microscope.

电子"枪"可以产生电子束，电子束相当于光学显微镜的光源。

These cases may indicate that the separatrix frequency region of bidirectional electron beams are within a large braodband from 250 to 2900 MHz and the originating ranges are in a very small (4 to 100 MHz) and different bands.

介绍云南和北京天文台射电频谱仪观测到的3个对偶的米波--微波Ⅲ型爆发，估计了双向电子束起源的频率和高度，3个事件分别揭示了在正向和反向漂移爆发之间的分界频率(约为250，1300和2900 MHz)，它们指出了一个致密的电子加速源，在这个源中产生了向上和向下两个方向注入的电子束，从这些事例可以表明不同事件的双向电子束的分界频率有一个相当大的范围(250-2900 MHz)，而它们的起源范围却是在一个很小的(大约4-100 MHz)和不同的频段范围内。

According to the property of EBB, scanning electron beam was considered as plane heat source instead of spot heat source in this paper. Aiming at the problems to measure the real-time temperature and residual stress of radiator difficultly at high temperature, the two-dimensional finite element models were established. Based on the thermal elastic-plasticity, the temperature fields and stress fields of EBB 6139T and 6204T radiator by two kinds of process were simulated by the software of ANSYS. It is of great value and significance to guide actual production.

本文根据电子束钎焊的特点，将电子束点热源转化为扫描加热时的面热源，针对散热器高温下温度实时测量和残余应力实测困难这一问题，建立了二维有限元模型，以热—弹塑性理论为基础，利用ANSYS软件对6139T和6204T散热器分别按两种电子束钎焊工艺钎焊的温度场和应力场进行了数值模拟，对于指导实际的生产具有重要的价值和意义。

In the second part of this thesis, the physical model, which used to describe the evolution of highly charged ions in the EBIT and provided by Penetrate, are discussed in detail. Based on this model, we have some modifications. The modified physical model takes the effect of the geometry of drift tube, the cumulation of space charge, and ionization heating into account.

在论文第二部分，我们详细讨论了Penetrate所提出的用来描述高价态离子在电子束离子阱中演化的物理模型，并在Penetrate所提出的物理模型基础上做了部分修正，修正后的物理模型考虑了漂移管的几何位形、电离加热以及电子束的空间电荷累积的影直流电弧等离子体发生器的数值模拟及电子束离子阱物理研究响，利用修正后的物理模型，对高价态离子在EBI下中演化过程进行详细地数值模拟。

This paper introduces the studies of the ultra-short Thomson scattering X-ray source at the accelerator laboratory of Tsinghua University in recent years. Properties such as the photon yield,the pulse length and time jitter of the produced photon pulse were predicted theoretically from the parameters of the electron bunch and the laser pulse,and the scattering angle. Preliminary experiments were successfully carried out with a 16 MeV backward-traveling-wave accelerator and the ns-Q switched laser provided by China Academy of Engineering Physics. This paper also introduces the 1.6-cell electron gun that was fabricated on site and the experiment with high RF power including the measurement of the electron bunche parameters. Based on these,we have designed an X-ray source,which is now under construction.

介绍了清华大学加速器实验室近年来关于汤姆逊散射超短X射线源的研究工作；研究了在任意散射角度下电子束参数和激光束参数对散射光子参数的影响，给出了散射光子的参数如光子产额、脉冲长度、时间抖动等与电子束参数、激光束参数和散射角度的关系；利用实验室已有的16 MeV反波行波加速器与中国工程物理研究院激光聚变研究中心提供的ns调Q激光搭建了汤姆逊散射初步实验平台并开展了实验研究；加工了1.6-cell光阴极微波电子枪，搭建了高功率实验平台，对产生的电子束参数进行了初步测量；对汤姆逊散射超短X射线源进行了设计并开展了相关的平台建设工作，对产生的X射线脉冲参数进行了模拟。

The former consists of LaBe crystal cathode, Wehnelt grid and an accelerating anode, and the latter is comprised of two equal radius concentrating cylinder electrodes.Its well known that the x-ray radiation emitted by electron-beams acting on metal target surface has well developed for about 100 years.

LaB_6电子枪发射的电子束经过静电聚焦系统，被会聚为微米级的电子束斑，该微束斑电子束与固体金属靶相互作用，产生出微束斑的X射线，从而形成微束斑X射线源。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。