A5069689566- Dust and Plasma Wave Phenomena
- Ionosphere and magnetosphere dynamics
- Magnetic confinement fusion research
- Carbon Nanotubes in Composites
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Earthquake Detection and Analysis
- Gyrotron and Vacuum Electronics Research
- Solar and Space Plasma Dynamics
- Laser-induced spectroscopy and plasma
- Terahertz technology and applications
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Ion-surface interactions and analysis
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Aluminum Alloys Composites Properties
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting and THz Device Technology
- Microstructure and mechanical properties
- Aluminum Alloy Microstructure Properties
- Advancements in Semiconductor Devices and Circuit Design
- Liquid Crystal Research Advancements
- Advanced Radiotherapy Techniques
- Laser-Matter Interactions and Applications
Delhi Technological University
2016-2025
Panjab University
2024
University of Illinois Urbana-Champaign
2024
Indian Institute of Technology Delhi
1967-2023
University of Delhi
1989-2023
Institute of Economic Growth
2023
Ministry of Health and Family Welfare
2023
Vikram Sarabhai Space Centre
2011-2022
Institute of Medical Sciences
2019-2022
Saveetha University
2022
In order to comprehend particle acceleration and transit in interplanetary space, nonlinear processes are of great importance. One process contributing the heating plasmas might be ponderomotive nonlinearity magnetic islands that causes localization parallel propagating left-handed circularly polarized dispersive Alfvén wave having a finite frequency. This study investigates impact on creation localized structures current sheets formation solar wind. Pseudo-spectral method difference with...
In this paper, we theoretically study the propagation dynamics of a q-Gaussian laser beam in plasma by considering relativistic and ponderomotive nonlinearities. The exhibits unique characteristics while interacting with plasma. redistributes density different way, which affects self-focusing. A comparative self-focusing for Gaussian beams is reported. results obtained from numerical analysis reveal stronger plasmas, desirable to excite large amplitude wave electron acceleration extending...
Maintaining a resilient and sustainable agro-production system is replete with challenges, because management practices designed to enhance productivity can overlook the range of values derived from ecosystems concerns about their future. Further complicating decisions being made agricultural settings variation in social-ecological stressors that shape how diverse community members interpret landscape change. We engaged residents Kaskaskia River Watershed Illinois, USA discussions...
The effect of air gaps under bolus material on the surface dose for electron beams is investigated. Dose measurements were performed from 0.0 to 3.0 cm and thicknesses 0.5 1.0 using various energies cone sizes available an linear accelerator. Our results show that decreases lower energies, smaller field sizes, thicker boluses, larger gaps.
<h2>Abstract</h2><h3>Purpose</h3> To compare rates of acute and late skin toxicities cosmetic outcomes after accelerated partial breast irradiation (APBI) or whole (WBI) using 3-dimensional conformal external beam radiation therapy in women with cancer conservation surgery (BCS). <h3>Methods Materials</h3> Women >35 years age invasive noninvasive ≤4 cm treated by BCS were randomized to 3D-CRT APBI (34 Gy/10 fractions/5 days) WBI (40 Gy/16 fractions/3 weeks ± boost irradiation). The primary...
The present paper examines the effect of different carrier gases and their flow rates on growth carbon nanotubes (CNTs). A theoretical model is developed incorporating charging rate nanotube, kinetics all plasma species, CNTs because diffusion accretion ions catalyst nanoparticle. three gases, i.e., argon (Ar), ammonia, nitrogen, are considered in investigation, varied individually (keeping hydrocarbon hydrogen gas constant) to investigate variations number densities consequent effects...
A gyrating ion beam propagating through a magnetized plasma cylinder containing K+ positive ions, electrons, and SF6− negative ions drives electrostatic lower hybrid waves to instability via Cyclotron interaction. Numerical calculations of the unstable mode frequencies growth rates both modes have been carried out for existing parameters. It is found that increase, with relative density ions. In addition, also increases Moreover, scale as one-third power density. The increase magnetic...
A theoretical modeling for the catalyst-assisted growth of graphene sheet in presence plasma has been investigated. It is observed that parameters can strongly affect and field emission properties sheet. The model developed accounts charging rate sheet; number density electrons, ions, neutral atoms; various elementary processes on surface catalyst nanoparticle; diffusion accretion ions; formation carbon-clusters large islands. In our investigation, it found thickness decreases with...
Dust charge fluctuation effect on the parametric decay of lower hybrid wave instability by relativistic runaway electrons is studied in a tokamak using kinetic treatment. Parametric upconversion pump waves into electron mode and upper sideband described. A ponderomotive force exerted possessing large amplitude wave, which drives mode. The coupling oscillatory velocity with density perturbations produces nonlinear frequency. As result, generation enhanced growth rate measured as square wave....
This study proposes a model to explain how energetic electron beams (produced by the magnetic reconnection process) cause whistler turbulence in area of magnetopause, as observed Magnetospheric Multiscale Mission. In this scenario, beam source has replaced mechanism. We develop dynamic equations beam-driven mode so that because large amplitude energy, it rises from noise level. As result, nonlinear effects follow due ponderomotive force, which results wave localization; eventually, turbulent...
An ion beam propagating through a magnetized plasma cylinder containing K+ positive ions, electrons and SF6− negative ions drives electrostatic ion-cyclotron (EIC) waves to instability via Cerenkov interaction. Two EIC wave modes are present, the modes. The frequencies growth rate of both unstable increase, with increasing ε (=nSF6−/nK+), relative density ions. (SF6− K+) magnetic field. scales as one-third power density. real frequency increases almost square root energy. Numerical...
An ion beam propagating through a magnetized plasma cylinder containing K+ positive ions, electrons, and SF6− negative ions drives electrostatic ion-acoustic (IA) waves to instability via Cerenkov interaction. Two IA wave modes in presence of are studied. The phase velocity the sound increase with relative density ions. unstable frequencies growth rate both scales as one-third power density. Numerical calculations velocity, rate, mode have been carried out for parameters experiment Song et...