等离子体激光

基于等离子体激光的X射线弯晶谱仪研究

Research of X-ray curved crystals spectrometer based on laser-plasma

本文以电弧等离子体激光干涉诊断为例论述了用CCD作为光电传感器对干涉条纹进行自动检测的原理和实验结果。

In this paper the diagnosis of arc plasma serves as the example to illustrate the principle and experimental results of automatic measurements of laser interference fringes with CCD .

实验给出了关于柱形等离子体激光介质发射区厚度及软X射线激光发射角的实验数据。实验也给出了软X射线激光强度随泵浦激光功率密度变化的讯息。

We also report the data of the lasing plasma thickness , the divergence angle of the x - ray laser beams , and the dependence of the x - ray laser intensity on pumping laser power densities .

送丝速度过大电弧等离子体屏蔽激光，焊缝形状类似于MIG。

When the wire feeding speed is very high , the weld geometry is similar to that of MIG welding .

非均匀等离子体由激光诱发的后向Raman散射利用Mirage效应确定非均匀材料厚度方向的热扩散率分布

BACKWARD RAMAN SCATTERING EXCITED BY LASER LIGHT IN AN INHOMOGENEOUS PLASMA Determination of thermal diffusivity distribution along the thickness of an inhomogeneous material by Mirage effect

小角度入射时，短脉冲（～ps量级）激光打靶产生的标尺长度较小的等离子体对激光的吸收率比长脉冲打靶时低。

For smaller incident angles , the absorption by a short scale length plasma produced by a short laser pulse (~ ps ) is lower than that of a long laser pulse .

密度减稀等离子体中激光尾场加速电子研究

Investigation in Electron Acceleration by Laser Wakefield on Density Attenuating Plasma

次稠密等离子体对激光与锥形靶相互作用的影响

Influence of under-dense plasma on laser conical target interaction

等离子体中激光脉冲对注入电子的加速

Injected Electron Acceleration by a Laser Pulse

等离子体的激光散射

Laser light scattering by plasma

给出横向密度分布不同的等离子体影响激光自聚焦的定量判据。

A quantitative approach to judge the impact of different plasma density distribution on laser self-focusing is proposed ;

把均匀等离子体中激光自聚焦的充分和必要条件的讨论推广到横向非均匀等离子体情形；

The discussion of the sufficient and necessary conditions for laser self-focusing in uniform plasmas is developed to non-uniform plasma cases ;

计算结果表明：等离子体在激光能量作用下产生了冲击波，冲击波运动到壁面处并反射，对壁面产生了较大的压力。

It indicated that the shock wave produced by laser supported plasma would move towards the wall and reflect with pressure increasing .

主要工作为：把均匀等离子体中激光的稳定模理论推广到横向非均匀等离子体情形；

Our main work is as follows : the stable laser mode theory in uniform plasmas is extended to non-uniform plasma cases ;

利用聚焦的高功率密度脉冲激光束入射样品表面产生的等离子体叫激光诱导等离子体。

The plasma generated by focusing a high power density pulse laser beam on the sample surface is known as Laser-induced plasma .

结果表明，小孔孔内的孔内等离子体对激光与工件材料的能量耦合有着重要的影响，具体表现为焊接深度和焊接宽度的变化；

It was shown that keyhole plasma has considerable effects on the energy transfer efficiency of the incident laser beam to the material , exhibiting various melting width and depth ;

本文从等离子体吸收激光能量的理论入手，采用提升喷嘴的实验方法，系统研究了电磁场参数对等离子体控制的影响。

According to the theory that plasma absorbs laser energy and with the experiment method which elevates the nozzle during welding , the effect of magnetic field on plasma control is discussed .

激光焊接过程中产生的等离子体与激光焊接质量有着密切的联系，如何有效控制等离子体，保证焊接质量，是激光深熔焊接的主要研究方向之一。

Plasma is closely linked to the quality of the joint in laser welding . Effective control the plasma signal is one of the main research directions in deep penetration laser welding .

可见，激光焊接过程中产生的等离子体对激光焊接过程、焊接质量以及对激光能量的利用率有非常大的影响，是一个不可忽视的现象。

So the plasma has great effects on the laser beam welding process , the welding quality and the efficiency of the laser beam energy . which can not be ignored during the laser beam welding .

从而降低了匙孔内金属等离子体对激光束的弱化作用（吸收和散焦），增大了匙孔底部固态金属对激光能量的吸收速率，使激光束的穿透能力增强。

It casued that the absorption and the defocus effect of metal plasma on laser inside the laser keyhole decreased , and the absorb speed of solid metal for laser energy increased . The penetration power of laser beam was enhanced , thus the deeper penetration depth was obtained .

等离子体X射线激光介质均匀性测量

Measurement of Inhomogeneity of Plasma X-Ray Laser Medium

本文分别利用离子枪和等离子体辅助脉冲激光沉积N掺杂ZnO薄膜。

In this work , N-doped ZnO films are grown with pulsed laser deposition ( PLD ) assisted by nitrogen ion beam or plasma .

对于N掺杂ZnO，我们发现N离子束或N等离子体辅助脉冲激光沉积技术都能制备出p型ZnO薄膜。

For N-doped ZnO films , we demonstrate that PLD assisted by both of nitrogen ion beam and N plasma can produce the ZnO films with p-type conductance .

用斜入射方法并考虑了激光被折射和P极化激光的共振吸收，计算了碳纤维靶的等离子体状态和激光增益。

The plasma condition and the gain coefficient of a carbon fiber target , which is irradiated by oblique incident laser light were calculated . The refraction of laser and the resonance absorption of P polarization laser were considered .

研究高功率密度CO2激光焊接过程中光致等离子体对入射激光的吸收以及侧吹辅助气体对等离子体控制的影响。

The paper aims at systematically studying the influence of laser-induced plasma on absorption loss of laser energy and the influence of assist-gas pressure on the plasma control in high power CO 2 laser welding .

宁夏冲湖积软弱土路基沉降规律及处治措施研究等离子体辅助脉冲激光沉积和原位掺杂方法制备稀土掺杂GaN薄膜

Study on the Settlement Rules and Treatment Methods of Soft Soil Embankment on Ningxia Alluvial-Lacustrine Plain Growth and Characterization of Rare Earth Metal Doped GaN Films by Electron Cyclotron Resonance Plasma Assisted Pulsed Laser Deposition

介绍了cBN的性能和制备cBN涂层的方法（等离子体增强脉冲激光沉积法和热丝辅助射频等离子体CVD法）；

The performance of c BN ( Cubic Boron Nitride ) and the methods for preparation of c BN coating such as the plasma enhanced pulsed laser deposition and the hot filament enhanced plasma chemical vapor deposition are introduced .

等离子体增强脉冲激光沉积o-BN薄膜

Deposition of orthorhombic boron nitride films by plasma-enhanced pulsed laser deposition

不锈钢等离子体性能的激光诱导击穿光谱法研究

Study on plasma properties of stainless steel using laser induced breakdown spectroscopy

固态等离子体板材的激光成形

A solid state plasma The Laser Forming of The Shell