共查询到20条相似文献,搜索用时 187 毫秒
1.
2.
I. A. Bolshakova S. A. Kulikov R. F. Konopleva V. A. Chekanov I. S. Vasilevskii F. M. Shurygin E. Yu. Makido I. Duran A. P. Moroz A. P. Shtabalyuk 《Physics of the Solid State》2014,56(1):157-160
The investigation of the radiation resistance of Group III–V semiconductor materials is an important and urgent problem. Magnetic sensors based on radiation resistant semiconductor materials are widely used in magnetomeasuring systems of thermonuclear industrial and experimental reactors. The basic approaches to the study of semiconductor materials under conditions of neutron irradiation and the results of some experiments on testing indium-containing semiconductor materials InSb, InAs, and their alloys InAs x Sb1 ? x are presented. The presented experience of the development of equipment for on-line testing of materials and magnetic diagnostic sensors under radiation conditions can be used for testing a wide range of materials under conditions close to those of the ITER and other thermonuclear reactors. 相似文献
3.
4.
In recent years, spatial self-phase modulation (SSPM) with two-dimensional (2D) materials has attracted the attention of many researchers as an emerging and ubiquitous nonlinear optical effect. In this review, the state of the art of 2D material-based SSPM is summarized. SSPM measures or tunes the nonlinearity of 2D materials, and it is also an effective approach to study the band structure of 2D materials. Several modified forms of SSPM, such as high-order, white-light-excited, vector field excited, and optically nonlinearly enhanced SSPM are also presented. Subsequently, the physical origin of the SSPM formation mechanism is compared and analyzed. Furthermore, the applications of SSPM with 2D materials, including passive photonic devices, generation of Bessel beams, and identifying the mode of the orbital angular momentum, are listed. Finally, several urgent problems of the SSPM with 2D materials, potential applications, and prospects for future development are presented. 相似文献
5.
Masashi Tokunaga 《Frontiers of Physics》2012,7(4):386-398
In this article, studies on the magnetoelectric effects of multiferroic materials in high magnetic fields, particularly pulsed magnetic fields, are discussed and results for some representative materials are presented. In the discussions on representative materials, the relationship between the crystallographic symmetry and the linear magnetoelectric effect in Cr2O3 is introduced. Then drastic changes in polarization caused by magnetic transitions are discussed through a case study of manganites with a perovskite-type structure. In addition, high field studies on the magnetoelectric effects in BiFeO3, which is an exceptional multiferroic material, are presented and discussed in the framework of the Landau-Ginzburg theory. 相似文献
6.
Two attractive methods for materials characterization are applied and discussed: (a) light scattering topography for fast and nondestructive testing of structural perfection, and (b) photoluminescence topography for evaluating the light emission characteristics of photoluminescent materials. Among the examples presented are semiconductor substrates and films of silicon, silicon-on-insulators of different kind, and III–V materials. 相似文献
7.
A. Yu. Gracheva M. A. Zav’yalov N. V. Ilyukhina V. A. Kukhto V. T. Tarasyuk V. P. Filippovich A. V. Egorkin A. V. Chasovskikh Yu. S. Pavlov A. V. Prokopenko N. E. Strokova S. A. Artem’ev S. P. Polyakova 《Physics of Atomic Nuclei》2016,79(14):1682-1687
The work is dedicated to improvement of efficiency of storage and processing of food raw materials using radiation technologies. International practice of radiation processing of food raw materials is presented and an increase in the consumption of irradiated food products is shown. The prospects of using radiation technologies for the processing of food products in Russia are discussed. The results of studies of radiation effects on various food products and packaging film by γ radiation and accelerated electrons are presented. 相似文献
8.
L. G. Shabel’nikov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2007,1(1):71-75
Methods are proposed for taking into account intensity losses due to random deviations of composition profiles and due to small-angle scattering effects in amorphous materials and wide-angle scattering effects in polycrystalline materials. Experimental data are presented on the study of polycrystalline-diamond lenses using a synchrotron radiation beam. 相似文献
9.
10.
11.
B. P. Gorshunov A. S. Prokhorov I. E. Spektor A. A. Volkov 《Radiophysics and Quantum Electronics》2005,48(10-11):825-830
We describe the techniques which permit one to measure the electrodynamic response of conductive materials in the millimeter and submillimeter wavelength ranges. Results of studying dielectric spectra of a number of materials whose properties are determined by electron correlations, e.g., superconductors, one-dimensional conductors, and compounds with heavy fermions, are presented. 相似文献
12.
13.
《Heat Recovery Systems and CHP》1987,7(4):383-388
Plastic container materials are evaluated for use in macroencapsulation of latent heat storage materials, with special emphasis on fatty acids. Different platics have been tested. With the most promising container material and a mixture of two fatty acids a laboratory model of a storage unit was built; first results of the experiments are presented. 相似文献
14.
15.
G. J. Simonis J. P. Sattler T. L. Worchesky R. P. Leavitt 《International Journal of Infrared and Millimeter Waves》1984,5(1):57-72
We have used non-dispersive Fourier-transformspectroscopic techniques to measure the complex indices of refraction of materials between frequencies of 120 and 550 GHz. Results are presented for crystal quartz, crosslinked polystyrene (Rexolite 1422), glass-loaded polytetrafluoroethylene (Duroid 5880) and a nickel ferrite (Trans-Tech 2-111). These results are compared with other data on these materials in this frequency range. The accuracy of these measurements yields a considerable improvement in the near-millimeter-wave characterization of several of these materials. For materials other than crystal quartz, our results are the first measurements of their properties over the entire frequency range studied. 相似文献
16.
Electronic stopping powers for 0. 05-10 MeV protons in a group of organic materials are systematically calculated. The calculations are based on Ashley's dielectric model, and an evaluation approach of optical energy loss function is incorporated into Ashley's model because no experimental optical data are available for most of the organic materials under consideration. The Barkas-effect correction and Bloch correction are included. The proton stopping powers for the considered organic materials except for mylar in the energy range from 0.05 to 10 MeV are presented for the first time. The results may be useful for studies of various radiation effects in these materials and for space research. 相似文献
17.
根据强扰动理论,在长波长近似条件下推导出蜂窝结构吸波材料等效介电常数和等效磁导率的计算公式.电磁参数计算结果表明,蜂窝结构吸波材料等效介电常数和等效磁导率均小于吸收层的介电常数和磁导率,但等效介电常数的降幅更大,从而使等效介电常数更接近于等效磁导率,这正是吸波材料波阻抗匹配设计所需要的.反射率计算结果表明,不同的蜂窝高度,吸收层对应一最优厚度,使蜂窝结构吸波材料的反射率最低.这些结果对于蜂窝结构吸波材料设计具有一定的意义.
关键词:
蜂窝结构吸波材料
等效介电常数
等效磁导率
反射率 相似文献
18.
It is shown that ellipsometry can be used for nondestructive characterization of defects in surface layers of both single crystal and amorphous materials. Results of ellipsometric measurements on surfaces of materials such as silicon, potassium chloride and glasses, with widely varying preparatory histories are presented and discussed. 相似文献
19.
V. F. Petrunin 《Physics of Atomic Nuclei》2016,79(14):1688-1691
Specific features that characterize nanoparticles and which are due to their small size and allow one to enhance the interaction between the electromagnetic radiation and nanostructured materials and to develop the effective protection of man and equipment against harmful uncontrolled radiation are reported. Examples of the development of nanocomposite radar absorbing materials that can be used for protection of man and equipment are presented. 相似文献