Расчет ионизационных и радиационных потерь быстрых электронов в полистирольном композите
Перспективные материалы. 2015. № 8. С. 5-11.
Павленко В. И., Bondarenko G., Черкашина Н. И.
Radiation-Induced Conductivity in Kapton-Like Polymers Featuring Conductivity Rising With an Accumulating Dose
, , et al., IEEE Transactions on Plasma Science 2019 Vol. 47 No. 8 P. 3739-3745
We have investigated the radiation-induced conductivity (RIC) in Kapton-like polymers in which it increases with an accumulating dose at large dose rates and long irradiation times. Such a behavior is very useful for spacecraft applications as it allows mitigating the spacecraft charging problems. Also, we studied ordinary polymers whose RIC steadily falls after reaching an ...
Added: March 16, 2019
Frequency Factor of the Semiempirical Model for the Radiation-Induced Conductivity in Spacecraft Polymers
, , , IEEE Transactions on Plasma Science 2018 Vol. 46 No. 3 P. 645-650
Added: March 10, 2018
Time-Resolved Radiation-Induced Conductivity of Polyimide and Its Description Using the Multiple Trapping Formalism
, , et al., Polymers 2019 Vol. 11 P. 2061(1)-2061(13)13
Abstract: Polymer dielectrics subjected to intense radiation fluxes exhibit a radiation-induced conductivity (RIC). Polyimide is a good dielectric with excellent mechanical and thermal properties featuring high radiation resistance currently widely used in the spacecraft industry. Its RIC has been extensively studied in several laboratories. The purpose of the present study is to make a direct measurement of the RIC ...
Added: December 16, 2019
Simulation of charged and excited particle transport in the low-current discharge in argon-mercury mixture
, , , Journal of Physics: Conference Series 2012 Vol. 406 No. 012031 P. 1-6
Simulation of electron, ion and metastable excited atom motion and interactions in a low-current discharge between the flat electrodes of a gas- discharge device in argon-mercury mixture is fulfilled. Also influence of gas temperature on both densities and fluxes of particles has been investigated. Distributions of the particle densities along the discharge gap under different ...
Added: January 17, 2013
, , et al., Измерительная техника 2016 № 8 С. 63-68
Mathematical model of multichannel sensors unit based on diamond detector elements of cosmic radiation fluxes parameters monitoring module has been developed. The simulation of output of the multichannel sensors unit registering cosmic space ionizing radiation at different spaceship orbits under different sun activity has been carried out. The work was supported by the Ministry of ...
Added: January 11, 2016
Theoretical Analysis of the Radiation-Induced Conductivity in Polymers Exposed to Pulsed and Continuous Electron Beams
, , et al., Polymers 2020 Vol. 12 No. 628 P. 1-10
Abstract: We have performed comparative numerical calculations using a multiple trapping (MT) formalism with an exponential and an aggregate two-exponential trap distributions for describing two mostly used experimental setups for studying the radiation-induced conductivity (RIC) and the time-of-flight (TOF) effects. Computations have been done for pulsed and long-time electron-beam irradiations in a small-signal regime. Predictions of these two approaches ...
Added: April 16, 2020
, , , Bulletin of the American Physical Society 2010 Vol. 55 No. 7 P. 50-50
In the paper simulation of electron, ion and metastable excited atom motion and interactions in a low-current discharge in argon-mercury mixture is fulfilled. Mixture ionization coefficient and the electric field strength have been calculated. ...
Added: May 13, 2013
, , et al., Measurement Techniques 2015 Vol. 58 No. 6 P. 713-718
Theoretical approaches to the construction of a spectrometric diamond detector of fluxes of ionizing radiation are considered. The device is intended for continuous monitoring of the radiation conditions onboard space vehicles for quickly arriving at decisions as regards active protection and prediction of the remaining life of space transportation systems. ...
Added: October 13, 2015
, , et al., IEEE Transactions on Plasma Science 2015 Vol. 43 No. 9 P. 2915 - 2924
We have reviewed the basic results in the radiation-induced conductivity and the bulk charging of polymers obtained by our group during the past 30 years, which are mostly unknown in the West. Special attention is given to a new experimental technique extensively used in our investigations based on an electron-gun technology allowing combined induced conductivity ...
Added: April 7, 2015
, , et al., Известия высших учебных заведений. Физика 2011 Т. 54 № 1/2 С. 125-132
На магнитоплазмадинамическом ускорителе кислородной плазмы, имитирующей действие атомарного кислорода, проведено облучение полимерных покрытий, на основе полиимида Kapton H, термопластичного полиимида (ПИ) и его модификации аморфным силиказолем СЗ (ПИ-СЗ). На основании полученных данных рассчитаны объемные коэффициенты эрозии полимеров, проведен сравнительный анализ устойчивости покрытий. Методом сканирующей электронной микроскопии исследованы изменения морфологии поверхностей полимеров после облучения. Показано, что композиция ...
Added: September 27, 2012
, , , Russian Chemical Bulletin 2020 No. 9 P. 1607-1613
The modern state of experimental and theoretical studies of the radiation-induced conductivity and charging of polymeric dielectrics under the action of electron beams is considered. The eff ect of the molecular mobility on the transport of excess charge carriers is discussed. ...
Added: December 19, 2020
, , , Plasma Physics Reports 2011 Vol. 3 No. 4 P. 366-369
Experiments indicating acceleration of charged particles as a result of separation of solid surfaces are analyzed. As a possible mechanism of such acceleration, generation of surface charge on the separated surfaces of a cleaved ionic crystal is considered. The maximum electric field generated due to the charging of the separated surfaces and the energy of ...
Added: April 12, 2012
Исследование микрополосковых частотно-селективных устройств СВЧ на резонансных отрезках замедляющих металлодиэлектрических систем
, , Антенны 2009 № 10 С. 31-37
The construction of a microstrip lowpass filter presents metallic conductors in the form of parallel sections of zigzag-lines and symmetrically located between them dielectric zigzag insertion, made on a dielectric subscript of policor, and has a much more coefficient of dieing (S21 parameter) and the steepness of the front of the amplitude-frequency characteristic, in the ...
Added: April 10, 2013
Молодые ученые – 2008 Материалы Международной научно-технической школы-конференции «Молодые ученые – науке, технологиям и профессиональному образованию»
М. : Энергоатомиздат, 2008
Added: December 14, 2012
, , , Soft Matter 2023 Vol. 19 P. 3281-3289
Based on the random phase approximation, we develop a molecular theory of self-coacervation in zwitterionic polymer solutions. We show that the interplay between the volume interactions of the monomeric units and electrostatic correlations of charged groups on a polymer backbone can result in liquid-liquid phase separation (self-coacervation). We analyse the behavior of the coacervate phase ...
Added: April 18, 2023
A molecular insight into poly(methyl methacrylate) impregnation with mefenamic acid in supercritical carbon dioxide: A computational simulation
, , , Journal of Molecular Liquids 2021 Vol. 337 Article 116424
The process of poly(methyl methacrylate) (PMMA) matrix impregnation with mefenamic acid (MFA) in a supercritical carbon dioxide medium has been studied by the full atomistic classical molecular dynamics method. Simulations have been performed for two systems that differ in the polymer sample size (≈270 kDa and ≈1080 kDa) at 333 K and 40 MPa. The characteristics of the systems, ...
Added: May 10, 2021
MODELING THE OPERATION OF A SENSOR UNIT IN A MONITORING DEVICE FOR THE PARAMETERS OF COSMIC RAY FLUXES
, , et al., Measurement Techniques 2016 Vol. 59 No. 8 P. 884-891
A mathematical model is developed for a multichannel sensor unit based on diamond detectors in a device for monitoring the parameters of cosmic ray ﬂ uxes. The output signals from these sensors are modelled as they detect ionizing radiation from outer space in different spacecraft orbits with various levels of solar activity. ...
Added: December 7, 2016
, , et al., Письма в Журнал экспериментальной и теоретической физики 2013 Т. 98 № 4 С. 270-274
A fractal (crumpled) polymer globule, which is an unsual equilibrium state of a condenced unknotted macromolecule that is experimentally found in the DNA folding in human chromosomes, has been formed through the hierarchical collapse of a polymeric chain. The relaxation dynamics of the elasic network constructed through the contact matrix of the fractal globule has ...
Added: November 22, 2013
Полиматериалы - 2003 Материалы Международной научно-технической школы-конференции «Межфазная релаксация в полиматериалах»
М. : Редакционно-издательский отдел МИРЭА, 2003
Added: December 14, 2012
, , Приборы и техника эксперимента 2010 Т. 53 № 1 С. 159-164
A setup for measuring the temperature dependences of refractive indices n(T) of semiconductors and dielectrics in the temperature range 300–700 K at the wavelengths of a He–Ne laser л = 0.63, 1.15, and 3.39 µm is described. Samples in the form of plane–parallel plates serve as Fabry–Perot etalons the optical thickness of which depends on ...
Added: April 23, 2012
Search for lepton avour violating decays of the Higgs boson to e tau and e mu in proton-proton collisions at sqrt(s)=8 TeV
, , et al., Modern Physics Letters B 2016
A direct search for lepton flavour violating decays of the Higgs boson (H) in the H→eτand H→eμ channels is described. The data sample used in the search was collected in proton–proton collisions at <img /> with the CMS detector at the LHC and corresponds to an integrated luminosity of 19.7 fb−1. No evidence is found for lepton flavour violating decays ...
Added: October 21, 2016
, , et al., IOP Conference Series: Materials Science and Engineering (MSE) 2020 Vol. 781 No. 1 P. 012011-1-012011-5
Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 µm. WSi structures with narrower strips demonstrated better performance for detection of single photons in longer wavelength range. The difference in normalized photon count rate for such structures ...
Added: December 10, 2020
, , Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018
, , , Laser Physics Letters 2020 Vol. 17 No. 4 P. 045901
In this paper we present measurements and comparison of SPP propagation length at the practically important telecom wavelength (1560 nm) as well as in the near-infrared and visible spectral ranges. The measurements were carried out for plane SPP waves excited on Ag film surface using optical microscopy of SPP waves in the far field. We ...
Added: January 15, 2021