电子束

The radius of the focal point will gradually rise and the amplitude of the beam wave will reduce as the beam transmits in the channel.

选择适当的系统参数，可调节束聚焦点位置和聚焦点半径的大小，实现电子束的长距传输并且减少电子束的耗散。

Electron Beam Ion Trap uses highly compressed electron beam to ionize ions and atoms to produces highly charged ions. lonization stages of almost any element in the Periodic Table can be produced and trapped for several hours in the EBIT.

电子束离子阱用磁场中高度压缩的高能电子束来电离离子以获得高价态离子，它可以产生元素周期表中任何元素任何价态的离子，并且能够在EBIT中的强磁场和静电势阱中约束足够长的时间。

In electronics, the ability of the CRT phosphor dots to withstand local over- heating due to the conversion into heat of the residual energy of the electron beam, i.e. that part of the electron beam energy that is not converted into visible light.

在电子学中，指阴极射线管的荧光粉承受局部过热的能力，这种过热是由于电子束的残余能量，即电子束没有转变成可见光的那部分能量，转变成了热。

In electronics, the ability of the CRT phosphor dots to withstand local over- heating due to the conversion into heat of the residual energy of the electron beam, i.e.

在电子学中，指阴极射线管的荧光粉承受局部过热的能力，这种过热是由于电子束的残余能量，即电子束没有转变成可见光的那部分能量，转变成了热。

Electron beam brazing parameters of stainless steel quadrate tube were decided.

确定了不锈钢方管电子束钎焊的工艺参数，并利用扫描电子显微镜和能谱分析仪，对电子束钎焊试样的显微组织进行了分析。

In the experiments,beam bugs were used to detect the beam currents and the beam positions,and the Cerenkov radiation generated by the electron beams interacting with a quartz plate was used to get the information of the beams.

在实验中，电子束流强度和电子柬心运动用电阻环进行测试，而电子束和石英玻璃的相互作用产生的契仑科夫辐射用来给出电子束包络和发射度信息。

The numerical calculations under relativistic correction and non-relativistic correction show that the difference of the deflection distances is about 61.4 mm,and the difference of the electron pulse widths is about 65 fs.

计算结果显示，在忽略了电场的边缘效应等因素后，电子束轴向速度的相对论修正与否对偏转距离和电子束脉冲宽度的影响分别达到61.4 mm和65 fs。

The paper describes theory of beam noise reduction in adiabatically varying magnetic field, deduces the relation between magnetic field and noise , gives out fourth order Runge-Kutta formula of 2-order differential equation, simulates the effects of different magnetic field on electron motion, the results show good agreement with theory analysis,it confirms that adiabatically varying magnetic field near the cathode can reduce the beam noise.

文章描述了回旋波保护放大器电子束绝热降噪的机理，推导了噪声与磁场的关系和二阶微分方程的四阶精度龙格－库塔法求解电子运动方程的公式，编程计算了电子在不同磁场中的运动轨迹，模拟了不同磁场对电子运动的影响，模拟结果与理论分析相符合，证实了阴极表面附近的缓降磁场可以降低电子束的噪声。

Because of hole on foils, only small part of electron beam bitted on the foils, the device can be operated repeatedly.

这些器件不需要外加磁场聚焦电子束，波束相互作用区短，功率容量大，结构简单，输出信号稳定，可以实现器件的小型化；电子束调制和微波能量提取分开进行，可以提高器件的效率而且便于参数调节。

The dosimetric characteristics in TSET were much different from the general single beam. The measurement before the treatment is necessary.

全身电子束照射条件下电子束剂量特性与常规条件下特性有很大不同，必须通过实际测量来为临床照射提供依据。

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。