查询词典 laser beam

When the laser ablated Ni plasma acts on the head and tail of the beam, the metal methanol complex clusters Ni+(CH3OH)nand the oxidation clusters NiO+(CH3OH)n (n=1~15) together with protonated methanol clusters H+(CH3OH)n are domain.

发现NiO+(CH3OH)n是由Ni+(CH3OH)n团簇内的脱甲烷反应生成的，而H+(CH3OH)n、 H3O+(CH3OH)n主要是激光等离子体中的电子与甲醇团簇碰撞电离产生的。

With the development of laser, fast-ion-beam laserspectroscopy has made it possible to measure the isotope shifts in thepreviously unmeasured areas with higher accuracy.

激光器技术的不断发展，快离子束激光光谱学的研究范围进一步扩大以及测量精度越来越高。

On the basics of chapter three, a new scheme of photon acceleration by which the large amplitude nonlinear density perturbation excited by a finite length driving beam in plasmas is used to upshift the frequency of an ultrashort laser pulse.

第四章在第三章研究基础上，提出一种新的光子加速机制，即，利用有限长电子束激励的大振幅非线性等离子体电子密度扰动来对入射的光脉冲进行加速。

In order to meet the need of laser doppler velocimeter inland,a dual-beam direction recognizable LDV is designed in this papper.

针对国内对激光多普勒测速仪的需求，本文设计并研制出一套双光束可识别方向的激光多普勒测速仪。

For a certain output frequency, if a small-period wiggler is used, the electron beam energy requirement will be decreased, so a more compact free-electron laser can be built.

对于一定的输出频率，如果使用小周期波荡器，对电子束能量要求相对降低，因而，可以研制出更加紧凑型的自由电子激光器。

The long-term stability is measured by monitoring the fluorescence signal of the ytterbium atomic beam induced by the locked laser.

频率的长期稳定性是通过测量由锁定激光诱导的镱原子束荧光信号强度随时间变化来评估。

The study results indicate that as emission power increases, the peak power density on the section of a certain distance will increase firstly, then it will descend and that the peak light intensity on the section will increase with the increasing of spot radius of basic mode Gaussian beam. As the propagation distance increases, the peak light intensity on the section will descend gradually, and the laser energy will spread. The light intensity distribution exhibits straw hat shape on a certain conditions, in other word to say, the central light intensity is less than acroteric light intensity.

结果表明，无风稳态热晕效应存在时，随发射功率的增大，一定传输距离截面上的峰值功率密度先增人后减小；截面上的峰值光强随基模高斯光束的腰斑半径的增大而增大；随着传输距离的增大，截面上峰值光强在逐渐减小，能量在逐渐向周围扩展；在一定条件下，截面上的光强分布会呈现中心光强小于周围光强的&草帽型&分布。

After analyzing the working characteristics of the laser crystal,taking into account of the aeolotropism of heat conduction of Nd:GdVO4 crystal,the general analytical expressions of the temperature field and thermal distortion field of Nd:GdVO4 crystal end-pumped by super-Gaussian beam were obtained based on the Poisson equation for aeolotropic heat conduction.

通过激光晶体工作特点分析，考虑到Nd：GdVO4晶体热传导各向异性的特点，采用各向异性传热的Poisson方程，得出了超高斯光束端面抽运Nd：GdVO4晶体温度场以及热形变场的一般解析表达式。

A high2efficiency coupling system was designed by using t heo ry of optical fiber coupling for t he high2power laser and t he beam t ransform , and in t he system numerical values of lens′apert ure and focus were optimized.

本文针对工业用大功率固体激光的特点，对光纤耦合系统的光束变换，大功率激光聚焦耦合的束宽等影响光纤耦合效率的问题进行了分析。

Both numerical and experimental results proved the symmetrical geometry can effectively improve the beam quality and get approximatively symmetrical laser distribution.

实验证明，采用对称泵浦结构能够有效的改善输出光束的空间分布，获得较为对称的激光输出。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。