An experiment on ion-acoustic solitary waves in dusty plasma is performed a double-plasma device. The leading part of sinusoidal pulse develops to an oscillation. troughs the oscillation become shallow when dust particles are mixed into plasma. Mach velocity first peak decreases due presence negatively charged grains for fixed height peak. width normalized with Debye length increases introduced experimental results compared numerical integrations modified Korteweg–de Vries–Burgers equation...

Increasing environmental awareness and demanding low energy consumption are of the top priorities for future vehicles manufacturing companies. This can be achieved by reducing wear friction engine components, so that its efficiency lifetime increased. Surface treatments coatings contribute to a better lubrication with oils participate significantly in achieving these goals. In this paper, diamond-like carbon (DLC) coating has been incorporated vehicle piston rings different RF powers using...

It is necessary to study the suitable effect of plasma parameters, such as exposure time and applied voltage on wicking properties silk fabrics. Wicking property fabric has been improved by using air dielectric barrier discharge treatment. The treatment utilized modify surface Untreated plasma-treated fabrics have characterized contact angle Goniometer, test, Wet-out time, scanning electron microscope, Attenuated Total Reflection Fourier Transforms Infrared spectrometer (ATR-FTIR) dye uptake...

X-ray diffraction profile, Raman and optical absorption spectra, surface morphology of phase-pure Cu₃SbS₄ films grown at 425 °C by co-sputtering metal precursors subsequent sulfurization.

Experimental observation on sheath and magnetic presheath over an oblique metallic plate in the presence of a field has been performed. The deployed plasma environment, making some finite angle with externally applied field. Studies have carried out for various angles, gradients plate-biasing voltages as well. analyses reveal that thickness increases while is varied from minimum to maximum; whereas reverse happens case thickness. Furthermore, measurements widths increasing strengths biasing...

The effects of ion beams on sheath properties are experimentally investigated in a double plasma device. dispersion relations the beam plasmas measured by interferometer method. low-frequency instability due to around negatively biased grid is found be controlled two parameters, namely biasing voltage and source anode voltage. caused resonant coupling three that arise asymmetry potential. structure follows Child–Langmuir law frequency also inversely proportional thickness. Therefore, transit...

Herein, the impact of exposing perovskite compound Pr 0.5 Sr MnO 3 to oxygen plasma is explored by comparing structural and transport properties exposed samples those unexposed ones. The oxidized PrO 2 in investigated due exposure. alterations can be linked changes MnOMn bond angle MnO length exposure, as indicated X‐ray diffraction analysis. Additionally, exposure increases conductivity incorporating into samples, making them oxygen‐rich. Detailed analysis resistivity thermoelectric...

Observations are carried out in a double-plasma device where the instabilities excited around negatively biased grid when there is sufficient plasma density difference between two chambers and an ion beam injected from source to target section. If slowly decreased, exhibit oppositely different characteristics after critical value. Below value of ratio, energy resonance background ions typical condition for excitation such instabilities. Chaotic phenomena occur hump potential profile near...

In this work, we study the hydrophobic properties of silk fabrics by deposition plasma-polymerized (pp) hexamethyldisiloxane (HMDSO) using low-pressure plasma-enhanced chemical vapor deposition. Recently, are under active research in textile industry. The effects coating time and power on HMDSO-coated investigated. Water contact angle pp-HMDSO-coated fabric surface is measured as a function time. Fabric shows an enhancement hydrophobicity after coating. Attenuated total reflectance-Fourier...

Experimental observation has been carried out to see the effect of magnetic field and grid biasing voltage in controlling sheath thickness a magnetized plasma system. The experiment is stainless steel chamber which divided into two regions by mesh grid, via source region diffused region. characteristic behavior ion rich formed across under various conditions applied investigated experimentally. It observed that at both increasing voltage, width expands region, whereas no such noticeable...

The typical phenomena of mixed mode oscillations and their associated nonlinear behaviors have been investigated in collisionless magnetized plasma a DC glow discharge system. Plasma is produced between cylindrical mesh grid constricted anode. A spherical 80% optical transparency kept inside to produce an inverted fireball. Three Langmuir probes are the ambient measure floating potential fluctuations at different positions chamber. It has observed that under certain conditions voltages...

Plasma pretreatment is an eco-friendly process employed to modify the surface properties and improve adhesion of tasar silk fabrics. The plasma has been carried out in DC glow discharge at constant power for different treatment durations (5, 10 30[Formula: see text]min). ZnO nanoparticles (ZnO NPs) play a significant role antibacterial, cleaning UV protection. NPs have synthesized by wet chemical method average crystallite size same found be 49[Formula: text]nm using X-ray diffraction (XRD)....

Plasma fireballs are generated due to a localized discharge and appear as luminous glow with sharp boundary, which suggests the presence of electric field such electrical sheath or double layer structure. The present work reports observation normal inverse homoclinic bifurcation phenomena in plasma oscillations that excited fireball device. controlling parameters for these observations ratio target source chamber (nT/nS) densities applied electrode voltage. Homoclinic is noticed potential...

Emissive Langmuir probe is one of the most efficient diagnostic tools available for plasma potential measurements. Extensive studies have been carried out in designing different kinds conventional (electrically heated) emissive probes (CEPs) to estimate potential. Laser heated (LHEP) has developed with certain advantages over such as low evaporation rate material, high lifetime, and emission levels. Most importantly, LHEP uses laser heat probe-tip does not require electric current like CEP....

It is recently discussed that a plasma system with drifting ions at near the acoustic phase speed becomes susceptible to weak but finite electron inertial delay effect. In such condition, linear normal modes of oscillations undergo resonant growth. Such situation exists naturally in transonic zones boundary layers. The present contribution considers this as specific case describe possible role an external source driving on usual ion soliton solution unstable region zone assumed have...

Reliable diagnostics of the plasma potential is one most important challenges in context with production, control and confinement a plasma. Emissive probes are readily available as direct diagnostic tools for good temporal spatial resolution many plasmas, even up to middle-sized fusion experiments. We present results investigations on heating lanthanum hexaboride graphite an infrared diode laser development laser-heated emissive probe. Such probe has higher electron emission, much longer...

We investigate the laser-induced structural phase transition of Cu3SbS4 to CuSbS2. The thin films were synthesized by a two-stage process sputtering and subsequent sulfurization. as-grown characterized x-ray diffraction Raman spectroscopy purity material. irradiated with 532 nm CW laser light at different power densities in situ was used transitions. Experimental results show an evidence local CuSbS2 formation from annealed areas above critical density. Heat transfer equations solved using...