initial beam中文什么意思

例句与用法

1. The beam orbit offset effects caused by the initial beam offset and linac componets " offsets in beam transferring process
   良好的束流轨道可以获得低发射度、低能散的高品质束流。
2. The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing . the equation describing the evolution of the laser spot is derived . it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam
   考虑多光子电离效应和光学kerr效应，首次利用力学类比的方法研究了超短脉冲激光在电离气体中的传输，详细分析了传输距离与激光初始光斑、初始发散角以及激光功率的关系，提出了实现长距离传输的条件。
3. We discuss the effect on the focusing of the probe beams for the five initial parameters : the amplitude of the pump beam , the separation between the pump and the probe beam centers , the wavelength ratio of the pump and the probe beams and the ratio of the initial beam widths at the directions of x and y . our numerical results show that , more the amplitude of the pump beam , the wavelength ratio of the pump and the probe beams and the ratio of the initial beam widths at the direction of y , more the probe focus ; the separation between the pump and the probe beam centers and the ratio of the initial beam widths at the direction of x have optimum values , respectively
   研究了泵浦光束输入振幅、泵浦光束-信号光束初始偏移、泵浦光束-信号光束波长比和泵浦光束-信号光束x 、 y方向的初始束宽比五个参量对信号光束聚焦程度的影响。数值模拟结果表明，泵浦光束输入振幅越大、泵浦光束-信号光束波长比越大、 y方向束宽比越大，信号光束聚焦程度越大；泵浦光束-信号光束初始偏移和x方向初始束宽比都存在一个最佳值，使得光束聚焦达到最佳效果，有趣的是这两个最佳值的比值基本保持不变约为0 . 4 0 . 6 。
4. Secondly , the beam orbit offset effects caused by the initial beam offset and the linac components " offsets have been quantitatively studied first . as an example with the injector linac for beijing electron positron collider upgrading project ( bepcii ) , the beam orbit offset caused by the above error effects have been simulated and analyzed
   其次定量研究束流的初始径向误差和加速器部件的安装误差等对束流轨道偏轴的影响，并以北京正负电子对撞机二期工程( bepc )的直线加速器为例，给出了上述各种误差导致轨道偏轴的模拟计算结果及其分析。