56 research outputs found
ΠΠΠ’ΠΠ ΠΠΠΠ« ΠΠΠΠΠ’Π ΠΠΠΠΠΠΠ’ΠΠΠ Π Π ΠΠΠΠΠ¦ΠΠΠΠΠΠ ΠΠΠ©ΠΠ’Π« ΠΠΠ― ΠΠΠΠΠΠΠ ΠΠΠΠΠ’Π ΠΠΠΠΠ
Electromagnetic (EMR) and ionizing (IR) radiation are one of the main destabilizing factors which affect functional equipment of space-rocket, aviation and ground-based complexes. Therefore, the direction of physical materials science, associated with the development of new materials and technologies for high-efficiency electromagnetic and radiation protection is of current interest. In the Scientific and Practical Materials Research Center of the National Academy of Sciences of Belarus new materials and technological processes for the formation of electromagnetic and radiation protection of the devices packages and elements of a wide range of purposes have been developed.Β A constant magnetic field and a powerful electromagnetic pulse are the most difficult variants for protection against EMR. Symmetric and gradient multilayer film structures are the promising materials for solving this problem. Thus, experimental results on the investigation of the efficiency of electromagnetic shields based on the structures of the system (FeβCoβNi)/Cu in a constant magnetic field, low-frequency and pulsed EMR are considered. It is shown that while choosing materials for magnetostatic shields, the main magnetic characteristics and the role of the inhomogeneity of the magnetic field in the shield volume and the nonlinearity of the magnetic permeability should be considered. It is concluded about the high efficiency of attenuation of microsecond duration pulsed magnetic fields by the gradient structures, which are 58Γ·40 dB at the magnetic field strengths of 1.25Γ·12.0 kA/m, respectively. A composite material based on the tungsten-copper system is proposed for electronic components and integrated circuits protection from the effects of IR. It is demonstrated that radiation shields based on it provide the effective protection against electron- and proton radiation with energies up to 2 MeV and up to 500 MeV, respectively. The practical application results of developed materials and technologies are given.ΠΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΡΠ΅ (ΠΠΠ) ΠΈ ΠΈΠΎΠ½ΠΈΠ·ΠΈΡΡΡΡΠΈΠ΅ (ΠΠ) ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΡΠ²Π»ΡΡΡΡΡ ΠΎΠ΄Π½ΠΈΠΌΠΈ ΠΈΠ· ΠΎΡΠ½ΠΎΠ²Π½ΡΡ
Π΄Π΅ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·ΠΈΡΡΡΡΠΈΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ², Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠΈΡ
Π½Π° ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ΅ ΠΎΠ±ΠΎΡΡΠ΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠ°ΠΊΠ΅ΡΠ½ΠΎ-ΠΊΠΎΡΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
, Π°Π²ΠΈΠ°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ Π½Π°Π·Π΅ΠΌΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ². Π ΡΠ²ΡΠ·ΠΈ Ρ ΡΡΠΈΠΌ Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ, ΡΠ²ΡΠ·Π°Π½Π½ΠΎΠ΅ Ρ ΡΠΎΠ·Π΄Π°Π½ΠΈΠ΅ΠΌ Π½ΠΎΠ²ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ Π΄Π»Ρ Π²ΡΡΠΎΠΊΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΈ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ, ΡΠ²Π»ΡΠ΅ΡΡΡ Π°ΠΊΡΡΠ°Π»ΡΠ½ΡΠΌ. Π ΠΠ°ΡΡΠ½ΠΎ-ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ΅Π½ΡΡΠ΅ ΠΠ°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΉ Π°ΠΊΠ°Π΄Π΅ΠΌΠΈΠΈ Π½Π°ΡΠΊ ΠΠ΅Π»Π°ΡΡΡΠΈ ΠΏΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ Π½ΠΎΠ²ΡΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΡ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΈ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ Π½Π° ΠΊΠΎΡΠΏΡΡΠ°Ρ
ΠΏΡΠΈΠ±ΠΎΡΠΎΠ² ΠΈ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΡΠΈΡΠΎΠΊΠΎΠ³ΠΎ ΡΠΏΠ΅ΠΊΡΡΠ° Π½Π°Π·Π½Π°ΡΠ΅Π½ΠΈΡ. ΠΠ°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡΠ»ΠΎΠΆΠ½ΡΠΌΠΈ Π²Π°ΡΠΈΠ°Π½ΡΠ°ΠΌΠΈ Π΄Π»Ρ Π·Π°ΡΠΈΡΡ ΠΎΡ ΠΠΠ ΡΠ²Π»ΡΡΡΡΡ ΠΏΠΎΡΡΠΎΡΠ½Π½ΠΎΠ΅ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ΅ ΠΏΠΎΠ»Π΅ ΠΈ ΠΌΠΎΡΠ½ΡΠΉ ΡΠ»Π΅ΠΊΡΡΠΎ- ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΠΉ ΠΈΠΌΠΏΡΠ»ΡΡ. ΠΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ Π΄Π»Ρ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π΄Π°Π½Π½ΠΎΠΉ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ β ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΠ΅ ΠΏΠ»Π΅Π½ΠΎΡΠ½ΡΠ΅ ΡΡΡΡΠΊΡΡΡΡ ΡΠΈΠΌΠΌΠ΅ΡΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΈ Π³ΡΠ°Π΄ΠΈΠ΅Π½ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠΏΠΎΠ². Π ΡΠ²ΡΠ·ΠΈ Ρ ΡΡΠΈΠΌ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
ΡΠΊΡΠ°Π½ΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΡΡΡΠΊΡΡΡ ΡΠΈΡΡΠ΅ΠΌΡ (FeβCoβNi)/Cu Π² ΠΏΠΎΡΡΠΎΡΠ½Π½ΠΎΠΌ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΌ ΠΏΠΎΠ»Π΅, Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΠΎΠΌ ΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΌ ΠΠΠ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ Π²ΡΠ±ΠΎΡΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π΄Π»Ρ ΠΌΠ°Π³Π½ΠΈΡΠΎΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΊΡΠ°Π½ΠΎΠ² ΡΠ»Π΅Π΄ΡΠ΅Ρ ΡΡΠΈΡΡΠ²Π°ΡΡ ΠΊΠ°ΠΊ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ, ΡΠ°ΠΊ ΠΈ ΡΠΎΠ»Ρ Π½Π΅ΠΎΠ΄Π½ΠΎΡΠΎΠ΄Π½ΠΎΡΡΠΈ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ Π² ΠΎΠ±ΡΠ΅ΠΌΠ΅ ΡΠΊΡΠ°Π½Π° ΠΈ Π½Π΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΡΡΡ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ½ΠΈΡΠ°Π΅ΠΌΠΎΡΡΠΈ. Π‘Π΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄ ΠΎ Π²ΡΡΠΎΠΊΠΎΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΎΡΠ»Π°Π±Π»Π΅Π½ΠΈΡ Π³ΡΠ°Π΄ΠΈΠ΅Π½ΡΠ½ΡΠΌΠΈ ΡΡΡΡΠΊΡΡΡΠ°ΠΌΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΡΡ
ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
ΠΏΠΎΠ»Π΅ΠΉ ΠΌΠΈΠΊΡΠΎΡΠ΅ΠΊΡΠ½Π΄Π½ΠΎΠΉ Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ, ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
58Γ·40 Π΄Π ΠΏΡΠΈ Π·Π½Π°ΡΠ΅Π½ΠΈΡΡ
Π½Π°ΠΏΡΡΠΆΠ΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
ΠΏΠΎΠ»Π΅ΠΉ 1,25Γ·12,0 ΠΊΠ/ΠΌ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ. ΠΠ»Ρ Π·Π°ΡΠΈΡΡ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΡΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ² ΠΈ ΠΈΠ½ΡΠ΅Π³ΡΠ°Π»ΡΠ½ΡΡ
ΠΌΠΈΠΊΡΠΎΡΡ
Π΅ΠΌ ΠΎΡ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΠ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΎΠ½Π½ΡΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π» Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠΈΡΡΠ΅ΠΌΡ Π²ΠΎΠ»ΡΡΡΠ°ΠΌβΠΌΠ΅Π΄Ρ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠΊΡΠ°Π½Ρ, ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½Π½ΡΠ΅ Π½Π° Π΅Π³ΠΎ ΠΎΡΠ½ΠΎΠ²Π΅, ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎ Π·Π°ΡΠΈΡΠ°ΡΡ ΠΎΡ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΈ ΠΏΡΠΎΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΠΉ Ρ ΡΠ½Π΅ΡΠ³ΠΈΡΠΌΠΈ Π΄ΠΎ 2 ΠΡΠ ΠΈ Π΄ΠΎ 500 ΠΡΠ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ. ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ.
Eye-Safe Solid-State Quasi-CW Raman Laser with Millisecond Pulse Duration
We demonstrate the first quasi-CW (ms-long pulses, pump duty cycle of 10%)
end-diode pumped solid state laser generating eye-safe radiation via
intracavity Raman conversion. The output power at the first Stokes wavelength
(1524 nm) was 250 mW. A theoretical model was applied to analyze the laser
system and provide routes for optimization. The possibility of true CW
operation was discussed.Comment: Preprint accepted for publication in Optics Communications on Feb 6,
201
Multilayer film shields for the protection of PMT from constant magnetic field
This is the Published Version made available with the permission of the publisher.Photomultiplier tubes (PMTs) are widely used in physical experiments as well as in applied devices.
PMTs are sensitive to magnetic field, so creation of effective magnetic shields for their protection is
very important. In this paper, the results of measurements of shielding effectiveness of multilayer film
magnetic shields on PMT-85 are presented. Shields were formed by alternating layers of a material
with high magnetic permeability (Ni-Fe) and high electric conductivityβCu. The maximum number
of bilayers reached 45. It is shown that in weak magnetic fields up to 0.5 mT, the output signal
amplitude from PMT-85 does not change for all used multilayer shields. In strong magnetic field of
2β4 mT, the output signal amplitude decrease with 10%β40% depending from the number of layers in the shield. The Pulse distribution of PMT-85 in magnetic field 0.2β4 mT slightly changed in the range 1.1%β1.3% for the case when the number of layers do not exceed 10 and practically did not change for a shield with 45 double layers
Multilayer film shields for the protection of PMT from constant magnetic field
This is the Published Version made available with the permission of the publisher.Photomultiplier tubes (PMTs) are widely used in physical experiments as well as in applied devices.
PMTs are sensitive to magnetic field, so creation of effective magnetic shields for their protection is
very important. In this paper, the results of measurements of shielding effectiveness of multilayer film
magnetic shields on PMT-85 are presented. Shields were formed by alternating layers of a material
with high magnetic permeability (Ni-Fe) and high electric conductivityβCu. The maximum number
of bilayers reached 45. It is shown that in weak magnetic fields up to 0.5 mT, the output signal
amplitude from PMT-85 does not change for all used multilayer shields. In strong magnetic field of
2β4 mT, the output signal amplitude decrease with 10%β40% depending from the number of layers in the shield. The Pulse distribution of PMT-85 in magnetic field 0.2β4 mT slightly changed in the range 1.1%β1.3% for the case when the number of layers do not exceed 10 and practically did not change for a shield with 45 double layers
Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure
The effect of microstructure on the efficiency of shielding or shunting of the magnetic fluxby permalloy shields was investigated in the present work. For this purpose, the FeNi shieldingcoatings with different grain structures were obtained using stationary and pulsed electrodeposition.The coatingsβ composition, crystal structure, surface microstructure, magnetic domain structure, andshielding efficiency were studied. It has been shown that coatings with 0.2β0.6ΞΌm grains have adisordered domain structure. Consequently, a higher value of the shielding efficiency was achieved,but the working range was too limited. The reason for this is probably the hindered movement of thedomain boundaries. Samples with nanosized grains have an ordered two-domain magnetic structurewith a permissible partial transition to a superparamagnetic state in regions with a grain size of lessthan 100 nm. The ordered magnetic structure, the small size of the domain, and the coexistenceof ferromagnetic and superparamagnetic regions, although they reduce the maximum value ofthe shielding efficiency, significantly expand the working range in the nanostructured permalloyshielding coatings. As a result, a dependence between the grain and domain structure and theefficiency of magnetostatic shielding was found
ΠΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΡ ΠΈΠ·Π»ΡΡΠ°ΡΡΠ΅ΠΉ ΠΊΠ°ΡΡΡΠΊΠΈ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎ-Π°ΠΏΠΏΠ°ΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Π΄Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ
Optimization of the radiation coil of the hardware-software complex for studying the effectiveness of shielding of low-frequency electromagnetic radiation will make it possible to assess the effectiveness of shielding coatings at a higher level. This fact will make it possible to develop coatings with improved characteristics. The purpose of this work was to determine the optimal characteristics of the emitting coil which will ensure its stable operation and magnetic field strength in the frequency range up to 100 kHz.The parameters of the manufactured samples, such as inductance (L), active (R) and total resistance (Z), were obtained using an MNIPI E7-20 emittance meter. In practice, the coils with the optimal parameters calculated theoretically were connected to a current source and amplifier. To detect electromagnetic radiation, a multilayer inductor connected to a UTB-TREND 722-050-5 oscilloscope was used as a signal receiver.The results of measurements showed that the resistance of multilayer coils is approximately 1000 times higher than that of single-layer coils. Also, for multilayer coils, an avalanche-like increase in total resistance is observed starting from a frequency of 10 kHz, while for single-layer coils there is a uniform increase in total resistance over the entire frequency range up to 100 kHz.The paper presents results of research on the correlation of the performance of single-layer and multilayer inductors depending on their parameters in the frequency range from Β 20 Hz Β to Β 100 kHz. Values of the voltage required to provide the magnetic field strength of 1, 5, 20 Oe at 25 Hz and 100 kHz have been calculated. After analyzing the data obtained, the optimal parameters of the inductor were found which ensure stable performance in the frequency range up to 100 kHz.ΠΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΡ ΠΈΠ·Π»ΡΡΠ°ΡΡΠ΅ΠΉ ΠΊΠ°ΡΡΡΠΊΠΈ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎ-Π°ΠΏΠΏΠ°ΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Π΄Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½ΠΈΠ·ΠΊΠΎΡΠ°ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΡ Π½Π° Π±ΠΎΠ»Π΅Π΅ ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠΌ ΡΡΠΎΠ²Π½Π΅ ΠΎΡΠ΅Π½ΠΈΠ²Π°ΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΊΡΠ°Π½ΠΈΡΡΡΡΠΈΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ. ΠΠ°Π½Π½ΡΠΉ ΡΠ°ΠΊΡ Π΄Π°ΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΡΠ°Π·ΡΠ°Π±Π°ΡΡΠ²Π°ΡΡ ΠΏΠΎΠΊΡΡΡΠΈΡ Ρ ΡΠ»ΡΡΡΠ΅Π½Π½ΡΠΌΠΈ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌΠΈ. Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ»ΠΎΡΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΈΠ·Π»ΡΡΠ°ΡΡΠ΅ΠΉ ΠΊΠ°ΡΡΡΠΊΠΈ, ΠΊΠΎΡΠΎΡΡΠ΅ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ°Ρ Π΅Ρ ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΡΡ ΡΠ°Π±ΠΎΡΡ ΠΈ Π½Π°ΠΏΡΡΠΆΡΠ½Π½ΠΎΡΡΡ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ Π² ΡΠ°ΡΡΠΎΡΠ½ΠΎΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ Π΄ΠΎ 100 ΠΊΠΡ.ΠΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½Π½ΡΡ
ΠΎΠ±ΡΠ°Π·ΡΠΎΠ², ΡΠ°ΠΊΠΈΠ΅ ΠΊΠ°ΠΊ ΠΈΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΠΎΡΡΡ, Π°ΠΊΡΠΈΠ²Π½ΠΎΠ΅ ΠΈ ΠΎΠ±ΡΠ΅Π΅ ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΠ΅, Π±ΡΠ»ΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»Ρ ΠΈΠΌΠΌΠΈΡΠ°Π½ΡΠ° ΠΠΠΠΠ E7-20. ΠΠ° ΠΏΡΠ°ΠΊΡΠΈΠΊΠ΅ ΠΊΠ°ΡΡΡΠΊΠΈ Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠΌΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌΠΈ, Π²ΡΡΠΈΡΠ»Π΅Π½Π½ΡΠΌΠΈ ΡΠ΅ΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈ, Π±ΡΠ»ΠΈ ΠΏΠΎΠ΄ΠΊΠ»ΡΡΠ΅Π½Ρ ΠΊ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΡ ΠΈ ΡΡΠΈΠ»ΠΈΡΠ΅Π»Ρ ΡΠΎΠΊΠ°. ΠΠ»Ρ Π΄Π΅ΡΠ΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΏΡΠΈΡΠΌΠ½ΠΈΠΊΠ° ΡΠΈΠ³Π½Π°Π»Π° ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»Π°ΡΡ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½Π°Ρ ΠΊΠ°ΡΡΡΠΊΠ° ΠΈΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ, ΠΏΠΎΠ΄ΠΊΠ»ΡΡΡΠ½Π½Π°Ρ ΠΊ ΠΎΡΡΠΈΠ»Π»ΠΎΠ³ΡΠ°ΡΡ UTB-TREND 722-050-5.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΠ΅ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΊΠ°ΡΡΡΠ΅ΠΊ ΠΏΡΠΈΠ±Π»ΠΈΠ·ΠΈΡΠ΅Π»ΡΠ½ΠΎ Π² 1000 ΡΠ°Π· Π±ΠΎΠ»ΡΡΠ΅ ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΡ ΠΎΠ΄Π½ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
. Π’Π°ΠΊΠΆΠ΅ Ρ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΊΠ°ΡΡΡΠ΅ΠΊ Π½Π°Π±Π»ΡΠ΄Π°Π΅ΡΡΡ Π»Π°Π²ΠΈΠ½ΠΎΠΎΠ±ΡΠ°Π·Π½ΡΠΉ ΡΠΎΡΡ ΠΎΠ±ΡΠ΅Π³ΠΎ ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΡ, Π½Π°ΡΠΈΠ½Π°Ρ Ρ ΡΠ°ΡΡΠΎΡΡ 10 ΠΊΠΡ, Π² ΡΠΎ Π²ΡΠ΅ΠΌΡ ΠΊΠ°ΠΊ Ρ ΠΎΠ΄Π½ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΊΠ°ΡΡΡΠ΅ΠΊ ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΠΈΡ ΡΠ°Π²Π½ΠΎΠΌΠ΅ΡΠ½ΡΠΉ ΡΠΎΡΡ ΠΎΠ±ΡΠ΅Π³ΠΎ ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΡ Π½Π° Π²ΡΡΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠ°ΡΡΠΎΡ Π΄ΠΎ 100 ΠΊΠΡ. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΊΠΎΡΡΠ΅Π»ΡΡΠΈΠΈ ΡΠ°Π±ΠΎΡΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Β ΠΎΠ΄Π½ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
Β ΠΈ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
Β ΠΊΠ°ΡΡΡΠ΅ΠΊΒ ΠΈΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈΒ Π²Β Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈΒ ΠΎΡΒ ΠΈΡ
Β ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ²Β Π²Β ΡΠ°ΡΡΠΎΡΠ½ΠΎΠΌΒ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΠΎΡ 20 ΠΡ Π΄ΠΎ 100 ΠΊΠΡ. Π Π°ΡΡΡΠΈΡΠ°Π½Ρ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ, Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΠ³ΠΎ Π΄Π»Ρ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π½Π°ΠΏΡΡΠΆΡΠ½Π½ΠΎΡΡΠΈ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ 1, 5, 20 Π ΠΏΡΠΈ 25 ΠΡ ΠΈ 100 ΠΊΠΡ. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π² ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ Π΄Π°Π½Π½ΡΠ΅, Π½Π°ΠΉΠ΄Π΅Π½Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΠΊΠ°ΡΡΡΠΊΠΈ ΠΈΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡΠΈΠ΅ ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΡΠ΅ ΡΠ°Π±ΠΎΡΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ Π² Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΡΠ°ΡΡΠΎΡ Π΄ΠΎ 100 ΠΊΠΡ
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ Π³Π°Π±Π°ΡΠΈΡΠ½ΡΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠ°Π½Π° Π½Π° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ
Study of dimensional parametersΚΌ influence on shielding properties of cylindrical shields will allow to optimise the fusion process, as well as to reduce production costs by reducing the material used. The purpose of this work was to compare results of theoretical calculation of shielding effectiveness of an infinite cylindrical shield with the data obtained in real conditions.A cylindrical Ni-Fe shield was synthesised by electrochemical deposition with length of 32 cm, diameter of 4.5 cm and shielding thickness of β 100 Β΅m. The cylinder length was then reduced from 32 cm to 6 cm in 4 cm increments and for each cylinder length shielding effectiveness was measured using three-coordinate Helmholtz field-forming system.The measurement results show that the calculation of shielding effectiveness of infinite cylindrical shield is valid for cylinder lengths l β₯ 18β20 cm. Shielding effectiveness is markedly reduced at values of l Λ 15 cm.Analysis of data obtained allowed to conclude that it is necessary to determine the correction factor when calculating a cylindrical screen shielding efficiencyΠΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π²Π»ΠΈΡΠ½ΠΈΡ Π³Π°Π±Π°ΡΠΈΡΠ½ΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² Π½Π° ΡΠΊΡΠ°Π½ΠΈΡΡΡΡΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΊΡΠ°Π½ΠΎΠ² ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΡ ΠΎΠΏΡΠΈΠΌΠΈΠ·ΠΈΡΠΎΠ²Π°ΡΡ ΠΏΡΠΎΡΠ΅ΡΡ ΡΠΈΠ½ΡΠ΅Π·Π°, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠ½ΠΈΠ·ΠΈΡΡ Π·Π°ΡΡΠ°ΡΡ Π½Π° ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²ΠΎ, Π·Π° ΡΡΡΡ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°. Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ Π±ΡΠ»ΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² ΡΠ΅ΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°ΡΡΡΡΠ° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π±Π΅ΡΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠ°Π½Π° ΠΈ Π΄Π°Π½Π½ΡΡ
, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
Π² ΡΠ΅Π°Π»ΡΠ½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
.ΠΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ Π±ΡΠ» ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΊΡΠ°Π½ Ni-Fe, Π΄Π»ΠΈΠ½Π° ΠΊΠΎΡΠΎΡΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π° 32 ΡΠΌ, Π΄ΠΈΠ°ΠΌΠ΅ΡΡ 4,5 ΡΠΌ, ΡΠΎΠ»ΡΠΈΠ½Π° ΡΠΊΡΠ°Π½ΠΈΡΡΡΡΠ΅Π³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ ΡΠΎΡΡΠ°Π²ΠΈΠ»Π°β 100 ΠΌΠΊΠΌ. ΠΠ°ΡΠ΅ΠΌ Π΄Π»ΠΈΠ½Π° ΡΠΈΠ»ΠΈΠ½Π΄ΡΠ° ΡΠΌΠ΅Π½ΡΡΠ°Π»Π°ΡΡ ΠΎΡ 30 Π΄ΠΎ 6 ΡΠΌ Ρ ΡΠ°Π³ΠΎΠΌ Π² 4 ΡΠΌ, Π΄Π»Ρ ΠΊΠ°ΠΆΠ΄ΠΎΠΉ Π΄Π»ΠΈΠ½Ρ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠ° Π±ΡΠ»Π° ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½Π° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΠΏΠΎΠ»Π΅ΠΎΠ±ΡΠ°Π·ΡΡΡΠ΅ΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΡΡΡΡ
ΠΊΠΎΠΎΡΠ΄ΠΈΠ½Π°ΡΠ½ΡΡ
ΠΊΠ°ΡΡΡΠ΅ΠΊ ΠΠ΅Π»ΡΠΌΠ³ΠΎΠ»ΡΡΠ°.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ ΡΠ°ΡΡΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π±Π΅ΡΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠ°Π½Π° ΡΠΏΡΠ°Π²Π΅Π΄Π»ΠΈΠ² ΠΏΡΠΈ Π΄Π»ΠΈΠ½Π΅ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠ° l β₯ 18β20 ΡΠΌ. ΠΡΠΈ Π·Π½Π°ΡΠ΅Π½ΠΈΡΡ
l Λ 15 ΡΠΌ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π·Π°ΠΌΠ΅ΡΠ½ΠΎ ΡΠ½ΠΈΠΆΠ°Π΅ΡΡΡ.ΠΠ½Π°Π»ΠΈΠ· ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
Π΄Π°Π½Π½ΡΡ
ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ» ΡΠ΄Π΅Π»Π°ΡΡ Π²ΡΠ²ΠΎΠ΄ ΠΎ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΏΠΎΠΏΡΠ°Π²ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠ° ΠΏΡΠΈ ΡΠ°ΡΡΡΡΠ°Ρ
ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠ°Π½Π°
ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΌΠ°Π³Π½ΠΈΡΠΎΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΎΠ±ΠΎΠ»ΠΎΡΠΊΠ°ΠΌΠΈ
Research and calculations results have been demonstrated that the dependence of the efficiency of magnetostatic shielding for shells with different thickness have a maximum whose position shifts with increasing thickness of the shielding cover in the area of higher fields. Positions of the peaks on the curve Π=Π(Π) and ΞΌ=ΞΌ(Π) do not coincide with each other. It is difficult to interpret in terms of the shunting model. The results can be explained by nonlinear nature of the distribution of the magnetic permeability witnin the thickness of the shields. The analytical calculations of the average permeability of cylindrical shells with varying thickness were carrying out depending on the strength of the external static magnetic field. It is shown that the courses of the experimental Π=Π(Π) and calculated ΞΌ0=ΞΌ0(Π) dependencies correlate with position of maximum.Π ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΈ ΡΠ°ΡΡΠ΅ΡΠΎΠ² ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΎΡ Π½Π°ΠΏΡΡΠΆΠ΅Π½Π½ΠΎΡΡΠΈ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ Π² ΡΠΊΡΠ°Π½Π°Ρ
Ρ ΡΠ°Π·Π½ΠΎΠΉ ΡΠΎΠ»ΡΠΈΠ½ΠΎΠΉ ΠΈΠΌΠ΅ΡΡ ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌΡ, ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ ΠΊΠΎΡΠΎΡΡΡ
ΡΠΌΠ΅ΡΠ°ΡΡΡΡ Ρ ΡΠΎΡΡΠΎΠΌ ΡΠΎΠ»ΡΠΈΠ½Ρ ΡΠΊΡΠ°Π½ΠΈΡΡΡΡΠ΅Π³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ Π² ΠΎΠ±Π»Π°ΡΡΡ Π±ΠΎΠ»ΡΡΠΈΡ
ΠΏΠΎΠ»Π΅ΠΉ. ΠΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌΠΎΠ² Π½Π° ΠΊΡΠΈΠ²ΡΡ
Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ Π = Π(Π) ΠΈ ΞΌ = ΞΌ(Π) Π½Π΅ ΡΠΎΠ²ΠΏΠ°Π΄Π°ΡΡ Π΄ΡΡΠ³ Ρ Π΄ΡΡΠ³ΠΎΠΌ, ΡΡΠΎ ΡΠ»ΠΎΠΆΠ½ΠΎ ΠΈΠ½ΡΠ΅ΡΠΏΡΠ΅ΡΠΈΡΠΎΠ²Π°ΡΡ Π² ΡΠ°ΠΌΠΊΠ°Ρ
ΠΌΠΎΠ΄Π΅Π»ΠΈ ΡΡΠ½ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΎΠ±ΡΡΡΠ½Π΅Π½Ρ Π½Π΅Π»ΠΈΠ½Π΅ΠΉΠ½ΡΠΌ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΎΠΌ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ½ΠΈΡΠ°Π΅ΠΌΠΎΡΡΠΈ ΠΏΠΎ ΡΠΎΠ»ΡΠΈΠ½Π΅ ΡΠΊΡΠ°Π½Π°. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Ρ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ°ΡΡΠ΅ΡΡ ΡΡΡΠ΅Π΄Π½Π΅Π½Π½ΠΎΠΉ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ½ΠΈΡΠ°Π΅ΠΌΠΎΡΡΠΈ ΠΊΠΎΠ½Π΅ΡΠ½ΡΡ
ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΠ±ΠΎΠ»ΠΎΡΠ΅ΠΊ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΡΠΎΠ»ΡΠΈΠ½Ρ Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ Π½Π°ΠΏΡΡΠΆΠ΅Π½Π½ΠΎΡΡΠΈ Π²Π½Π΅ΡΠ½Π΅Π³ΠΎ ΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ. Π₯ΠΎΠ΄ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
Π = Π(Π½) ΠΈ ΡΠ°ΡΡΡΠΈΡΠ°Π½Π½ΡΡ
ΞΌ0=ΞΌ0(Π) Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠ΅ΠΉ, ΠΏΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ, ΡΡΠΎ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌΠΎΠ² ΠΊΠΎΡΡΠ΅Π»ΠΈΡΡΡΡ ΠΌΠ΅ΠΆΠ΄Ρ ΡΠΎΠ±ΠΎΠΉ
ΠΠ‘ΠΠΠΠΠΠΠ‘Π’Π Π‘ΠΠΠ’ΠΠΠ ΠΠΠΠΠΠ‘ΠΠΠΠΠ«Π₯ Π‘Π’Π Π£ΠΠ’Π£Π ΠΠ ΠΠ‘ΠΠΠΠ ΠΠΠΠΠ’Π ΠΠΠΠ’ΠΠ§ΠΠ‘ΠΠ ΠΠ‘ΠΠΠΠΠΠΠ«Π₯ ΠΠΠΠΠΠ ΠΠΠΠΠΠ¬-ΠΠΠΠΠΠ Π ΠΠ€Π€ΠΠΠ’ΠΠΠΠΠ‘Π’Π¬ ΠΠ₯ Π ΠΠΠΠΠ¦ΠΠΠΠΠΠ ΠΠΠ©ΠΠ’Π«
Modern semiconductor devices and microchips are sensitive to the effects of ionizing radiation. Nevertheless, they are widely used in military and space technology, in the nuclear industry. At the same time, a number of technological, circuit and software solutions are used to reduce the effects of radiation exposure. The most preferable method is one based on using shields, due to its low cost and excellent radiation properties of shieldβs materials. Recently, special attention has been paid to the study of multilayer structures. Experimental samples of Ni-Fe alloys and multilayer Ni-Fe/Cu structures with different chemical composition were obtained by electrochemical deposition. The dependence of chemical composition variation from deposition conditions was determined. Ni-Fe alloys crystal structure was studied using X-ray diffraction. Shielding properties of Ni-Fe/Cu multilayer structures were investigating on linear accelerator ELA-4 under 4 MeV electron irradiation. Silicon p-MOSFETs were used as test structures. Evaluation of electron flow weakening effectiveness was performed by current-voltage characteristics changing β threshold voltage of pMOS-transistors, which were located behind shields based on NiFe/Cu multilayered structures and without shields. It was found that increasing number of Ni-Fe layers within the same total thickness leads to maximum shielding efficiency.Π‘ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΏΠΎΠ»ΡΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²ΡΠ΅ ΠΏΡΠΈΠ±ΠΎΡΡ ΠΈ ΠΌΠΈΠΊΡΠΎΡΡ
Π΅ΠΌΡ ΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½Ρ ΠΊ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΈΠΎΠ½ΠΈΠ·ΠΈΡΡΡΡΠΈΡ
ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΠΉ. Π’Π΅ΠΌ Π½Π΅ ΠΌΠ΅Π½Π΅Π΅ ΠΎΠ½ΠΈ ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡΡΡ Π² Π²ΠΎΠ΅Π½Π½ΠΎΠΉ ΠΈ ΠΊΠΎΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅Ρ
Π½ΠΈΠΊΠ΅, Π² ΡΠ΄Π΅ΡΠ½ΠΎΠΉ ΠΈΠ½Π΄ΡΡΡΡΠΈΠΈ. ΠΡΠΈ ΡΡΠΎΠΌ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΡΡΠ΄ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
, ΡΡ
Π΅ΠΌΠΎΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΡΡ
ΡΠ΅ΡΠ΅Π½ΠΈΠΉ, ΡΠΌΠ΅Π½ΡΡΠ°ΡΡΠΈΡ
ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΡ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ. ΠΠ°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΠΏΡΠ΅Π΄ΠΏΠΎΡΡΠΈΡΠ΅Π»ΡΠ½ΡΠΌ ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠ²Π»ΡΠ΅ΡΡΡ Π²ΡΠ±ΠΎΡ ΠΌΠ΅ΡΠΎΠ΄Π° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠΊΡΠ°Π½ΠΎΠ², ΠΏΠΎΡΠΊΠΎΠ»ΡΠΊΡ ΠΎΠ½ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ½Π΅Π΅ ΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΡΡΡ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΡΠΌΠΈ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΡΡ
Π΄Π»Ρ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΡ ΡΠΊΡΠ°Π½ΠΎΠ² ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². Π ΠΏΠΎΡΠ»Π΅Π΄Π½Π΅Π΅ Π²ΡΠ΅ΠΌΡ ΠΎΡΠΎΠ±ΠΎΠ΅ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΡΠ΄Π΅Π»ΡΠ΅ΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΡΡΡΡΠΊΡΡΡ, ΡΠ°ΠΊ ΠΊΠ°ΠΊ ΠΏΡΠΈ ΠΏΡΠΎΡ
ΠΎΠΆΠ΄Π΅Π½ΠΈΠΈ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΠΉ ΡΠ΅ΡΠ΅Π· ΡΡΠΈ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ΅ ΠΎΡΠ»Π°Π±Π»Π΅Π½ΠΈΠ΅ ΡΡΡΠ΅ΠΊΡΠΎΠ² ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ, ΡΡΠΎ ΠΈΠΌΠ΅Π΅Ρ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΡΠΉ Π½Π°ΡΡΠ½ΡΠΉ ΠΈ ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΡΠ΅Ρ. ΠΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΠ»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΎΠ±ΡΠ°Π·ΡΡ ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΡΠΏΠ»Π°Π²ΠΎΠ² NiFe ΠΈ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΡΡΡΡΠΊΡΡΡ NiFe/Cu Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌ ΡΠΎΡΡΠ°Π²ΠΎΠΌ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Ρ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° ΠΎΡ ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ. ΠΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΠ²ΡΠΊΠΎΠΉ Π΄ΠΈΡΡΠ°ΠΊΡΠΈΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΡΡΠΊΡΡΡΡ. ΠΠΎΠΊΡΡΡΠΈΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΡΡΡΡ Π³ΡΠ°Π½Π΅ΡΠ΅Π½ΡΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΊΡΠ±ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΡΠ΅ΡΠΊΠΎΠΉ, Ρ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ ΠΆΠ΅Π»Π΅Π·Π° ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΉΠΊΠΈ ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅ΡΡΡ. ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠ°Π΄ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΡΡΡΡΠΊΡΡΡ NiFe/Cu ΠΎΡΠ΅Π½ΠΈΠ²Π°Π»Π°ΡΡ ΠΏΡΠΈ ΠΎΠ±Π»ΡΡΠ΅Π½ΠΈΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π°ΠΌΠΈ Ρ ΡΠ½Π΅ΡΠ³ΠΈΠ΅ΠΉ 4 ΠΡΠ Π½Π° Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΌ ΡΡΠΊΠΎΡΠΈΡΠ΅Π»Π΅ ΠΠΠ£-4. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΠ΅ΡΡΠΎΠ²ΡΡ
ΡΡΡΡΠΊΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΠΈΡΡ ΠΊΡΠ΅ΠΌΠ½ΠΈΠ΅Π²ΡΠ΅ ΠΠΠ-ΡΡΠ°Π½Π·ΠΈΡΡΠΎΡΡ. ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΎΡΠ»Π°Π±Π»Π΅Π½ΠΈΡ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° Π±ΡΠ»Π° ΠΎΡΠ΅Π½Π΅Π½Π° ΠΏΠΎ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π²ΠΎΠ»ΡΡΠ°ΠΌΠΏΠ΅ΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ: ΠΏΠΎΡΠΎΠ³ΠΎΠ²ΠΎΠ³ΠΎ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ Π΄Π»Ρ ΠΠΠ ΡΡΠ°Π½Π·ΠΈΡΡΠΎΡΠΎΠ², ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Π½ΡΡ
Π·Π° ΡΠΊΡΠ°Π½Π°ΠΌΠΈ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΡΡΡΡΠΊΡΡΡ NiFe/Cu, ΠΈ Π±Π΅Π· ΡΠΊΡΠ°Π½ΠΎΠ². Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Ρ ΡΠΎΡΡΠΎΠΌ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° ΡΠ»ΠΎΠ΅Π² ΠΏΡΠΈ ΡΠΎΡ
ΡΠ°Π½Π΅Π½ΠΈΠΈ ΡΡΠΌΠΌΠ°ΡΠ½ΠΎΠΉ ΡΠΎΠ»ΡΠΈΠ½Ρ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΊΡΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅ΡΡΡ, ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠΎΠ·Π΄Π°Π²Π°ΡΡ Π²ΡΡΠΎΠΊΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠ΅ ΡΠΊΡΠ°Π½Ρ ΠΏΡΠΈ ΡΠΎΠΏΠΎΡΡΠ°Π²ΠΈΠΌΡΡ
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