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Analysis of electron energy distribution function in a magnetically filtered complex plasma

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Chinese Physics B 2013年第4期22卷 324-329页

作者： M K Deka H Bailung N C Adhikary Physical Sciences Division Institute of Advanced Study in Science and Technology Vigyan Path Paschim Boragaon Garchuk Guwahati-781035 Assam India

The electron energy distribution function （EEDF） for a magnetically filtered dusty plasma is studied in a dusty double plasma device where the electron energy can be varied from 0.15 eV to ～ 2.8 eV and plasma density from 10 6 cm-3 to 10 9cm-3 . The characteristics of EEDF for these ranges of plasma parameters are investigated in a pristine plasma as well as in a dusty plasma. The results show that in the presence of dust, there is a drastic modification in EEDF patterns in a plasma with higher electron temperature and density than those in a low temperature and low density plasma produced by the magnetic filter.

关键词： dusty plasma magnetic filter electron energy distribution function

Some I-Convergent Sequence Spaces Defined by Orlicz Functions

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Acta Mathematicae Applicatae Sinica 2011年第1期27卷 149-154页

作者： Binod Chandra Tripathy Bipan Hazarika Mathematical Sciences Division Institute of Advanced Study in Science and TechnologyPaschim BoragaonGarchukGuwahati-781 035AssamINDIA. Department of Mathematics Rajiv Gandhi UniversityDoimukhItanagar-791 112Arunachal PradeshINDIA.

In this article we introduce the sequence spaces cI（M）, c0I（M）, mI（M） and m0I（M） using the Orlicz function M. We study some of the properties like solid, symmetric, sequence algebra, etc and prove some inclusi... 详细信息

关键词： Ideal filter Orlicz function I-convergent I-null solid sequence algebra symmetric convergencefree

Nonlinear ion-acoustic solitary waves in an electron-positron-ion plasma with relativistic positron beam

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Chinese Physics B 2018年第10期27卷 471-476页

作者： Ridip Sarma Amar P Misra Nirab C Adhikary Department of Mathematics University of Science and TechnologyTechno CityKhanaparaBaridua9th MileRi-BhoiMeghalayaIndia Department of Mathematics Siksha BhavanaVisva-Bharati University Physical Sciences Division Institute of Advanced Study in Science and TechnologyVigyan PathPaschim BoragaonGarchukGuwahati-781035AssamIndia

The propagation characteristics of nonlinear ion–acoustic（IA） solitary waves（SWs） are studied in thermal electron–positron–ion plasma considering the effect of relativistic positron beam. Starting from a set of fluid equations and using the reductive perturbation technique, we derive a Korteweg–de Vries（KdV） equation which governs the evolution of weakly nonlinear IA SWs in relativistic beam driven plasmas. The properties of the IA soliton are studied, and it is shown that the presence of relativistic positron beam significantly modifies the characteristics of IA solitons.

关键词： electron-positron-ion plasma relativistic effect ion-acoustic wave homogeneous balance method

Dust Acoustic Shock Waves with Non-Thermal and Vortex-Like Ions in Dusty Plasma

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Plasma Science and Technology 2015年第4期17卷 268-275页

作者： Apul N.DEV Jnanjyoti SARMA Manoj K.DEKA Nirab C.ADHIKARY Department of Science and Humanities College of Science and Technology RUB Bhutan Department of Mathematics R. G. Baruah College Guwahati-781025 Assam India Centre of Plasma Physics Tepesia Sonapur Assam India Physical Science Divison Institute of Advanced Study in Science and Technology Vigyan Path Garchuk Guwahati-781035 Assam India

A rigorous investigation is presented on the propagation characteristics of non-linear dust acoustic（DA）waves in an unmagnetized dusty plasma system containing non-thermal and vortex-like ions and Maxwellian electrons under the effect of a fluctuating charged dust *** three-dimensional（3D）Burgers＇equation and a new form of a lower degree modified 3D Burgers＇equation with their analytical solutions are derived to study the features of shock waves in such *** effect of the population of non-thermal ions,the vortex-like ion parameter as well as the temperature ratios of ions and electrons on the evolution of shock waves in the presence of dust charge fluctuation is *** theoretical investigation might be effectively utilized to unveil the nature of many astrophysical plasma environments（Saturn＇s spokes etc.）where such plasmas are reported to have existed.

关键词： dusty plasma reductive perturbation method 3D Burgers' equation modified 3D Burgers' equation tan-hyperbolic method

Suppression of a spontaneous dust density wave by modulation of ion streaming

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Plasma Science and Technology 2020年第4期22卷 40-47页

作者： Tonuj DEKA Bidyut CHUTIA Y BAILUNG S K SHARMA H BAILUNG Physical Sciences Division Institute of Advanced Study in Science and Technology(IASST)Paschim BoragaonGarchukGuwahatiAssam 781035India

Synchronization of a self-excited dust density wave has been experimentally investigated in a strongly coupled dusty plasma.A dust density wave of frequency^78 Hz is spontaneously generated from the dust void boundary due to the ion streaming *** electric field in the dust void region is measured,and the electric field force and ion drag force on the dust particles at the void boundary are estimated to explain the mechanism of spontaneous dust density wave *** occurring through the suppression mechanism is observed by modulating the ion streaming by applying an external sinusoidal signal to the dust *** sufficiently high modulation amplitude,the onset of period-doubling bifurcation is *** Fourier transform spectral analysis is done using time-series data obtained from high-speed video *** van der Pol equation with a force term is used to correlate the observed suppression phenomena.

关键词： dust density wave suppression phenomena strongly coupled dusty plasma forced van der Pol equation

关于一类p-赋范空间l^p的关联序列(英文)

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北京工业大学学报 2005年第5期31卷 553-556页

作者： TRIPATHYBinodChandra SENMausumi Mathematical Sciences Division Institute of Advanced Studyin Science and TechnologyPaschim BoragaonGarchukGuwahati 781035IndiaMathematical Sciences DivisionInstitute of Advanced Studyin Science and TechnologyPaschim BoragaonGarchukGuwahati 781035India

引进了序列空间m(φ,p),01和序列空间m(φ)相关联,并研究了户p-赋范空间m(φ,p)的性质.

关键词：对称空间正则空间完全性 P-赋范空间 k-空间

On Some Class of n-Normed Generalized Difference Sequences Related to l_p-Space

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Analysis in Theory and Applications 2014年第2期30卷 214-223页

作者： Binod Chandra Tripathy Inder Kumar Rana Stuti Borgohain Mathematical Sciences Division Institute of Advanced Study in Science and TechnologyPaschim Boragaon Garchuk GUWAHATI- 781035 India Department of Mathematics Indian Institute of Technology

In this paper, we introduce the class of n-normed generalized difference sequences related to lp-space. Some properties of this sequence space like solidness, symmetricity, convergence-free etc. are studied. We obtain... 详细信息

关键词： Generalized difference operator n-norm n-Banach space symmetricity solidness,convergence free completeness.

Kadomtsev–Petviashvili(KP) Burgers Equation in Dusty Negative Ion Plasmas:Evolution of Dust-Ion Acoustic Shocks

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Communications in Theoretical Physics 2014年第12期61卷 875-880页

作者： A.N.Dev J.Sarma M.K.Deka A.P.Misra N.C.Adhikary Department of Science and Humanities College of Science and Technology RUB Bhutan Department of Mathematics R.G.Baruah College Guwahati-781025 Assam India Centre of Plasma Physics Tepesia Sonapur Kamrup Assam India Department of Mathematics Siksha Bhavana Visva-Bharati University Santiniketan-731 235 India Physical Sciences Division Institute of Advanced Study in Science and Technology Vigyan Path Paschim BoragaonGarchuk Guwahati – 781035 Assam India

We study the nonlinear propagation of dust-ion acoustic(DIA) shock waves in an un-magnetized dusty plasma which consists of electrons, both positive and negative ions and negatively charged immobile dust grains. Starting from a set of hydrodynamic equations with the ion thermal pressures and ion kinematic viscosities included, and using a standard reductive perturbation method, the Kadomtsev–Petviashivili–Burgers(K-P-Burgers) equation is derived, which governs the evolution of DIA shocks. A stationary solution of the K-P-Burgers equation is obtained and its properties are analysed with different plasma number densities, ion temperatures and masses. It is shown that a transition from shocks with negative potential to positive one occurs depending on the negative ion concentration in the plasma and the obliqueness of propagation of DIA waves.

关键词： dusty plasmas Shock wave reductive perturbation technique K-P burgers equation