查询词典 plasmas

In the present thesis, firstly, the dispersion relation of an infinite dusty plasmas is studied, it is found that the effects of adiabatic variation, the external magnetic field, the particle collisions and the obliqueness have strong influence on dusty low frequency waves.

本文首先研究了无界尘埃等离子体中低频波的色散关系，发现尘埃绝热电荷扰动、外磁场、粒子碰撞和斜传效应对尘埃低频波都有强烈影响。

The electron orbital energy of the different ion-stages as well as different configurations is different in the hot plasmas, therefore the lines of same transition can distribute in certain energy range.

在高温等离子体中，不同价态离子及不同组态的电子轨道能量是不同的，因此相同跃迁的谱线会分布在一定的能量范围内。

Calculation of temperature and density of plasmas in target pellet of ICF experiment.

ICF中靶丸内等离子体的温度和密度的估算。

The collisional absorption of the right circularly polarized wave and the left circularly polarized wave propagating parallel to the magnetic field by inhomogeneous magnetized plasmas is discussed, and the attenuations are calculated under different conditions.

讨论了不均匀磁化等离子体片对平行于磁场方向传播的左、右旋圆极化电磁波的碰撞吸收，计算了不同条件下衰减率。计算表明，当电磁波的频率接近电子碰撞频率时，磁等离子体对电磁波的吸收达到最大值。

We found that in the case of neglecting magnetic shear, the plasma current also can be driven by the shear Alfvén wave and the circularly polarized wave, respectively, the efficiency of current drive in the rotation plasma is independent of the plasma density In addition, it is found that whether m=0 or m≠ 0, the effect of the magnetic shear on the compressional Alfvén wave current drive makes the efficiency be dependent on the plasma density and inversely proportional to it.

当考虑旋转效应而不考虑磁剪切效应时，等离子体平板模型下平面极化压缩阿尔芬波能够驱动旋转等离子体电流，驱动效率也与等离子体密度无关，却与旋转大小成正比，这与Avinash[Phys Plasmas 4，2204（1997）]的结论一致。我们发现在这种情况下剪切阿尔芬波和圆偏振阿尔芬波都可以驱动旋转等离子体电流，旋转效应引起的电流驱动与密度无关。

There are two focus included as the following two topics:The measurement of equilibrium charge of dust particles in the plasmas By studying the forces acting on dust particles at the equilibrium position, where, the electric force and gravity force are importantly considered, the equilibrium charge of dust particles can be presumedly calculated according to the relation of the forces.

文中着重进行了以下两个方面的研究：一、等离子体中尘埃粒子平衡电荷量的测量通过研究尘埃粒子在平衡位置处的受力情况确定尘埃颗粒所带的电荷量。主要考虑两种力的作用即尘埃粒子所受的电场力和重力。根据这两种力的平衡关系就可以粗略得出尘埃粒子在平衡位置处的电荷量。

Experiments have been performed using ultra-short (30fs) ultra-intense laser pulse(up to 1018W/cm2) focused into under-dense plasmas(ne＜1020/cm3). A 2ω0 probe pulse was used for the shadowgraphy and the investigation on the propagation of laser under various condition was presented.

开展超短超强激光与次稠密等离子体相互作用实验，采用探针光对激光等离子体相互作用区域进行阴影成像，研究了不同激光功率与临界功率比值及不同激光脉冲长度与等离子体波波长比值下的激光在次稠密等离子体中的自聚焦传输。

By contrast, plasmas aren't efficient to make at small-screen sizes.

相反，等离子电视在小萤幕方面显示出不足。

BSpatial characterization of laser induced Cu plasma in air with different laser focusing distancesThe plasma spectra induced by pulsed laser ablation of copper target are measured. By adjusting the distance of the len-sample, the spectrum of air spark plasma、 Cu plasma and the reciprocity of both plasmas are analysed. From the result, it has been shown that the focusing of the laser beam has an important infunence to analyse the properties of the sample.

b 不同的激光焦点位置产生的等离子体光谱的空间特性研究激光烧蚀置于空气中的Cu靶产生等离子体，通过调节透镜与Cu靶的距离，本文观测了激光烧蚀空气产生的空气火花等离子体、激光直接烧蚀铜靶产生Cu等离子体以及空气火花等离子体与Cu等离子体相互作用等不同情况下的激光诱导击穿发射光谱，激光束焦点的位置在分析材料性质的过程中有着重要的影响。

This paper describes the elliptical crystal spectrograph which is used to investigate X-ray spectroscopy of laser-produced plasmas.

描述了用于激光等离子体X射线光谱研究的椭圆弯曲晶体谱仪系统。

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。