查询词典 electron

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 images of AAM were characterized by scanning electron microscope , transmission electron microscope and atom force microscope .

主要研究程果和结论如下：（1）在硫酸、草酸和磷酸电解液中，在不同的阳极氧化条件下制备出具有不同大小、密度、深度和纵横比的纳米孔阵列AAM模板。

The formation mechanism of the absolute instability and gyrotron backward wave oscillations is analyzed, and the methods to suppress the parasitical modes are discussed.The nonlinear theory model of gyro-TWT is consummated by considering the influence of tapered magnetic field and waveguide radius, electron velocity spread, and waveguide loss on electron beam-wave interaction. The large-signal characteristic of gyro-TWT, such as launching loss and absolute instability, are also analyzed in detail. This work establishes the foundation for the development of a gyro-TWT amplifier.

重点研究了两段损耗波导结构和损耗陶瓷结构回旋行波管中的电子注-波互作用，分析了绝对不稳定性和回旋返波振荡的形成机制和抑制寄生模式的方法；完善了回旋行波管的非线性理论模型，并考虑了磁场和波导半径渐变、速度零散、波导损耗等因素对注-波互作用的影响；详细分析了发射损耗、相位稳定性等回旋行波管的大信号特征，为回旋行波管放大器的研制奠定了基础。

By analyzing and calculating work on the spectroscopic diagnostic results, the quantitative relationship between the electron density of laser induced plasma and linear heat input as well as the relationship between electron density and factor of absorption are deduced.

通过对激光等离子体光谱诊断结果的分析、计算，定量地得到了等离子体粒子密度与焊接线能量之间的函数关系以及粒子密度与吸收系数的函数关系。

High power electron accelerator is the key installation which supplies electron beam to desulfurize from factory smoke, it is required to give stable DC of 500 mA and can operate for long time continuously.

大功率电子加速器是用电子束进行电厂烟气净化的源装置，要求稳定发射直流500mA，且适用于连续长时间运行。

Effects of temperature,pH value, electron donor and electron acceptor on denitrification were studied.

研究了温度、pH值、电子供体种类及电子受体种类对反硝化的影响。

The results suggest that mullite is likely to combine with electron acceptor rather than with electron donor.

计算结果表明，莫来石很容易与电子接受体结合，不容易与电子给予体结合。

Therefore, Fe〓is the source of electron and RCl is electron acceptor.

取得的重要成果和创新之处主要体现在： 1。

An electron-rich acetylide ligand would render the metal center more electron-rich and hence raise the dπ orbital energy, leading to decrease energy of the MLCT excited state.

证明通过改变乙炔基配体取代基的电子效应，能够调节最低激发态MLCT态的能量。

The cytoplasm of PGCs was weak acidophilic. By transmission electron microcopy, the electron–dense bodies were observed in the vicinity of PGCs' nuclear membrance.

此外，其早期胚胎的PGCs中有卵黄块；在迁移过程中发生不同程度的变形；PAS反应阳性。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。