Открытый доступ
Доступ предоставлен
Только для подписчиков
Том 43, № 2 (2016)
- Год: 2016
- Статей: 7
- URL: https://journals.rcsi.science/1068-3356/issue/view/14050
Article
Features of interannual variations of ozone in the middle stratosphere over Moscow according to observations at millimeter waves
Аннотация
The features of interannual variations of ozone in the middle stratosphere over Moscow in cold half-years since 1995 to 2015 are considered. These features are most pronounced in two separated groups of winters (six winters in each group) in December–January. It appeared that the seasonal variation of ozone averaged within each group is characterized by a higher ozone concentration \({C_{{O_3}}}\) in group I (in comparison with group II) in December and lower values in January. The differences in the seasonal variation of ozone between these groups at the level of 10 mbar in December and January exceed 2 ppm. A feature of the stratosphere circulation for half-year group I is the existence of a stable polar vortex and the absence of strong midwinter perturbations and sudden stratospheric warmings. On the contrary, for cold half-years of group II, the appearance of strong stratospheric warmings in January–February is in common. The results presented provide a quantitative estimate of the effect of these stratospheric warmings on ozone of the middle stratosphere overMoscow.
53-58
Radiation source for medical X-ray examination, based on the use of electron radiation during channeling in crystals
Аннотация
One of the possible applications of relativistic electron radiation during channeling in crystals, i.e., the use of radiation for medical visualization, is considered.A setup scheme is proposed, the results of numerical simulation of electron dynamics in crystals and radiation generation and the results of calculations of dose loads are presented.
59-61
On the development of plasma relativistic microwave oscillator without strong magnetic field
Аннотация
A method for generating microwave pulses with a power of ∼1 GW and a frequency controlled in a band from 2 to 15 GHz during the interaction of relativistic electrons with plasma without strong magnetic field is proposed in the numerical model. The combination of a broadband plasma relativistic microwave oscillator and a monochromatic magnetically insulated transmission line oscillator (MILO) allows the development of a device combining advantages of both prototypes.
62-65
Study of the interaction of atomic particle fluxes with fine-grained media
Аннотация
The behavior of fine-grained (1–5 μm) boron and tungsten powders upon exposure to heat, electric field, and argon and hydrogen plasma ions is studied. A wide range of powder modifications caused by the above factors is sequentially considered. The driving forces and processes controlling the describedmodifications are presented.
66-68
Photoluminescence of DNA, ATP, and ADP in photon traps upon excitation by the fourth harmonic of the YAG:Nd3+ laser
Аннотация
Room-temperature photoluminescence spectra of DNA, ATP, and ADP placed into photon traps are recorded under ultraviolet excitation. It is found that the use of laser ultraviolet pulse-periodic radiation for excitingDNA,ATP, andADP photoluminescence significantly increases their quantum yield and offers the possibility of lasing in these materials.
69-73
74-79
Study of the energy spectrum and mass composition of primary cosmic rays in the energy range of 1018–1020 eV using a balloon setup in antarctica (SPHERE-antarctica project)
Аннотация
An Antarctic balloon experiment for measuring the energy spectrum and elemental composition of cosmic rays in the ultrahigh-energy range (1018–1020) eV is proposed. Scientific equipment will measure fluorescence caused by an extensive air shower formed in the atmosphere by an ultrahigh energy particle and Cherenkov light of this shower reflected from a snow surface. It is assumed that the balloon will fly in the circumpolar orbit in Antarctica at a height of ~25 km for (2–3) winter (in the Southern Hemisphere)months. For this time, ~3000 events caused by particles with energies above 1018 eV and (200–300) events caused by particles with energies above 1019 eV will be detected.
80-86