Microwave irradiation stimulated superconductivity and Josephson effect in cross-like film structures

The cross-like film structure is studied experimentally. The occurrence and magnitude of the induced superconductivity effect in the microwave field are shown to depend on the mean free path (l = 350-2 000 Å). The homogeneity of a long strip was found through a comparison with Galaiko's theory [1] which gives quantitative agreement. As the control current i passes through a transverse strip, the relative effect of induced superconductivity increases. The i growth causes the coupling energy of the controlled cross-like element to decrease leading to microwave induced Josephson steps in the I-V characteristics.On a réalisé l'étude expérimentale d'un film cruciforme. On a montré que l'apparition et la grandeur de la supraconductivité induite par le champ haute fréquence dépendent de la longueur du libre parcours moyen (l = 350-2 000 Å). L'homogénéité le long du film a été déterminée par comparaison avec la théorie de Galaiko [1], on constate un bon accord quantitatif. En présence du courant de contrôle dans la bande transversale, nous observons une augmentation relative de la supraconductivité induite. Dans ces conditions, le couplage de l'élément de Josephson cruciforme diminue, et des marches de Josephson apparaissent sur la caractéristique V-I

Research of radioecological processes by methods of the theory of reliability

Theory and the models of radiocapacity ecosystems using the theory and models of reliability have allowed adequately to describe the laws of migration and radionuclides distribution for different types ecosystems of res-ervoirs and land. The theory and the models of radiocapacity allow strictly to define critical elements of ecosys-tem where it is necessary to expect temporary or final depoting of radionuclides.The approach on the basis of application biogenic tracers allows within the framework of the theory both models of radiocapacity and reliabil-ity simultaneously to estimate the processes of radionuclides migration, to define the dozes of loading on biota ecosystems, and to establish fundamental parameters of radionuclides redistribution speeds and others pollutants in different types of ecosystems