共查询到19条相似文献,搜索用时 54 毫秒
1.
2.
3.
软X射线多层膜元件研究进展 总被引:1,自引:0,他引:1
对各国进行的软X射线多层膜研究所取得的最新成果给出了比较系统全面的评述,首次给出了文献报道的软X射线全波段的各种膜系实测正入射反射率的统计结果。 相似文献
4.
“长波长软X射线多层膜的设计与制备”这篇论文介绍了用离子束溅射法制备长波长软X射线多层膜的研究工作,并报道了一种新的材料组合C/Si用于28.4nm(43. 65eV)和30.4nm(40.78 eV)波段的多层膜反射镜,并且用离子束溅射装置制备了正入 射条件下的C/Si多层膜反射镜.同时,用软X射线反射计测量了样品的反射率,从实验结果看出,制备的多层膜样品在28.4nm和30.4nm波段附近的实测正入射反射率分别达到11.4%和14.3%,实验指标达到了国内领先水平,并接近了国际水平. 相似文献
5.
日本松下技术研究所用准分子激光CVD工艺技术实现软X射线聚光用高反射率多层膜反射镜,这种反射镜是在硅基板上由钨(W)和硅(Si)交互沉积的多层膜(W/Si)构成椭圆柱面反射镜(尺寸:55×55mm~2,短半径60mm),(图1).多层膜的各层,在基板纵剖面内的膜厚是不同的.该椭圆形反射镜能把点光源发出的软X射线聚成光束.所发出的两条光线能聚焦成一点. 相似文献
6.
7.
8.
介绍了D.G.Sterns的散射方法,用它来描述单个非理想粗糙界面的散射,它适用于软X射线短波段区域.将这种方法应用到多层膜结构,并采用D.G.Sterns方法的数学模型来描述软X射线短波段区域(1~10 nm)多层膜界面粗糙度.在这个理论的框架下,对我们所研制的波长为4.77 nm的Co/C多层膜反射镜界面粗糙度进行分析,估算出该多层镜界面间均方根粗糙度为0.7 nm.粗糙度估算结果与小角X射线衍射的测定结果相一致.(PE13) 相似文献
9.
10.
11.
12.
13.
14.
15.
mSCTP for soft handover in transport layer 总被引:1,自引:0,他引:1
Seok Joo Koh Moon Jeong Chang Meejeong Lee 《Communications Letters, IEEE》2004,8(3):189-191
In this letter, we discuss mobile Stream Control Transmission Protocol (SCTP) for soft handover in the transport layer. From the experimentations on triggering rules for Add-IP and Primary-Change during the handover, it is shown that the aggressive Add-IP and conservative Primary-Change rules provide better throughput. 相似文献
16.
Paul A. Gibson E.A. Xiaoshi Zhang Lytle A. Popmintchev T. Xibin Zhou Murnane M.M. Christov I.P. Kapteyn H.C. 《Quantum Electronics, IEEE Journal of》2006,42(1):14-26
Coherent beams at soft X-ray (SXR) wavelengths can be generated using extreme nonlinear optics by focusing an intense laser into a gas. In this paper, we discuss phase-matching and quasi-phase-matching techniques that use gas-filled modulated waveguides to enhance the frequency conversion process. This leads to the generation of SXR beams that are both spatially and temporally coherent. 相似文献
17.
Takayanagi I. Nagai K. Tetsuka H. Inoue Y. Araki S. Mochimaru S. Iketaki Y. Horikawa Y. Matsumoto K. 《Electron Devices, IEEE Transactions on》1995,42(8):1425-1432
This paper describes a new area sensor for soft X-rays, and its performance. The operational principle is based on detecting the change in potential of a floating photodiode caused by X-ray-induced electron-hole pairs generation in a stacked amorphous silicon photoconversion layer. The photoresponse was measured at wavelength from 50 /spl Aring/ to 160 /spl Aring/. The signal to noise ratio of 25 dB was achieved, when the number of incident 70 /spl Aring/ X-ray photons is as low as 230/pixel. Quantum efficiency (stored carriers/photon) at 70 /spl Aring/ wavelength was 22. In addition, good reproducibility (<10% deviation) between different detectors and good reproducibility (<20% deviation) after ten months were also clarified. The performance of this area sensor indicates its potential for detection of soft X-ray images.<> 相似文献
18.
Polyphenylene(聚酰亚胺)树脂带有非常好的介电性能,通过对Polyphenylene分子细量化,然后和带有好架桥性能以及可溶混性的树脂搅拌,开发出了同时带有低诱电(Low-Dk)和高耐热性,适用于高速信号传输设备使用的多层线路板材料。这个材料性能为Dk=3.8, Df=0.005(1 GHz), Tg=210℃。在5 GHz的使用条件下,与传统的材料相比,降低信号损失约15 db/m。可以广泛的应用在如网络设备等的高速,大容量信号传输设备。 相似文献
19.
Bensaoula A. Malki H.A. Kwari A.M. 《Semiconductor Manufacturing, IEEE Transactions on》1998,11(3):421-431
This paper demonstrates the incorporation of a multilayer neural network in semiconductor thin film deposition processes. As a first step toward neural network-based process control, we present results from neural network pattern classification and beam analysis of reflection high energy electron diffraction RHEED images of GaAs/AlGaAs crystal surfaces during molecular beam epitaxy growth. For beam analysis, we used the neural network to detect and measure the intensity of the RHEED beam spots during the growth process and, through Fourier transformation, determined the thin film deposition rate. The neural network RHEED pattern classification and intensity analysis capability allows, powerful in situ real time monitoring of epitaxial thin film deposition processes. Our results show that a three layer network with sixteen hidden neurons and three output neurons had the highest correct classification rate with a success rate of 100% during testing and training on 13 examples 相似文献