The absorption, reflection, and transmission of electromagnetic waves by a nonuniform plasma slab immersed in an ambient uniform magnetic field various strengths are studied this paper. effects the parameters strength on absorbed, reflected, transmitted power discussed. magnetized is modeled series subslabs. calculation results show that density gradient absorbed power, as well frequency band resonant significant. A complete analysis utilizing scattering matrix method also used to compare...

The regenerative flow pump (RFP) derives its name from the circular pattern akin to a vortex. However, presence of numerous vortices results in highly turbulent and pressure fluctuation. This study delves into characteristics internal unsteady two distinct RFP models featuring different blade shapes. Numerical simulations are employed obtain field, which is subsequently scrutinized using proper orthogonal decomposition (POD) method. show that average peripheral direction undergoes minimal...

The effects of increased magnetic field and pressure on electron transport with a rotating spoke in cylindrical anode layer Hall plasma accelerator are investigated by three-dimensional particle-in-cell numerical simulation. azimuthal rotation the has frequency 12.5 MHz. It propagates direction E × B drift at speed ∼1.0 106 m/s (about 37% speed). Local charge separation occurs because local density concentration is accompanied an almost uniform ion distribution. non-axisymmetrical...

The effects of the magnetic gradient on ion beam current in an end Hall-type source with a mirror field are investigated. In cylindrical Hall which ring other than regular pole is shortened and centrally inserted, profile can be formed around annular anode. A positive-negative variable shown experimentally to enhance ionization; ionization efficiency substantially affected by different gradient. high results 60% conversion discharge current. experimental interpretation presented this paper.

Abstract As a particular vane pump, regenerative flow pump (RFP) is not only featured by relatively high head under low rate, but also characterized compact volume and simple structure. However, the efficiency of RFP quite low. For purpose improving RFP’s hydraulic performance internal flow, this paper investigates influence matching relation between impeller diameter height on performance. Two cases through changing impeller’s are designed compared. The results show that, as increases while...

A current drop is found when the discharge voltage increased in cylindrical anode layer hall plasma accelerator and three-dimensional particle-in-cell simulation performed to investigate phenomenon. The results which agree with experiments show that ion density region does not always rise reaches a maximum value at appropriate voltage. This phenomenon considered be macroscopic ramification of change ionization cross section as electron energy varies. With regard Ar+, largest appears 45–110...

The enhancement of planar radio frequency (RF) inductively coupled argon plasma is studied in the presence an assistant anode and external magnetic field at low pressure. influence on efficiency RF power absorption parameters investigated. An axial into discharge region by electromagnetic coil outside chamber cylindrical inserted to enhance discharge. density profile are measured electrostatic Langmuir probe different fields voltages. can be effectively enhanced compared with nonmagnetized...

Plasmas with higher density and better uniformity are produced using an improved planar radio frequency (rf) inductively coupled plasma configuration in immersion ion implantation (PIII). An axial magnetic field is by external electromagnetic coils outside the discharge chamber. The rf power can be effectively absorbed vicinity of electron gyrofrequency due to enhanced resonant absorption waves whistler wave range, which propagate nearly along lines thus greatly increases density. confined a...

A linear ion source with magnetron hollow cathode discharge is described in this paper. The based on an anode layer thruster closed-drift electrons that move a closed path the E×B fields. An open slit configuration designed at end of for extraction beam produced by discharge. special configurations enable uninterrupted and expanded operation oxygen as well other reactive gases because absence electron source. current density uniformity were experimentally evaluated. Using source, surface...

In the present paper, a physical model is proposed for reducing problem of drag reduction an attached bow shock around nose high-speed vehicle with on-board discharge, to balance between magnetic pressure and gas plane partially ionized consisting environmental discharge-produced plasma. The relation strength discharge-induced studied by means set one-fluid, hydromagnetic equations reformed purpose, where field consists electron current (produced discharge)-induced flow-induced one. A...

The formation of the double layer created around anode in magnetized radio frequency inductively coupled plasma, which is visually apparent because enhanced light emission from neutrals excited by energetic electrons, investigated detail this work. effects external magnetic field and voltage on evolution a cylindrical luminous glow are evaluated hydrogen plasmas. initially produced additional dc discharge forms when inserted into plasma diffusion region positively biased. If sufficiently...

A method to control the ion current in direct-current plasma-immersion implantation (PIII) is reported for low-pressure magnetized inductively coupled plasma. The can be conveniently adjusted by applying bias voltage conducting grid that separates plasma formation and (ion acceleration) zones without need alter rf input power, gas flux, or other operating conditions. diminishes with an increase plasmas varied from 48 1 mA increasing 0 70 V at −50 kV sample 0.5 mTorr hydrogen pressure. High...

The time-dependent current wave forms measured using a pulse biased planar electrode in hydrogen radio-frequency (rf), inductively coupled plasma, plasma immersion ion implantation experiments are observed to vary the presence of an external magnetic field B. Results further indicate that magnitude is related strength and direction field, rf power, pressure, but curves can be primarily correlated with discharges enhanced all cases due confinement electrons, enlargement generation volume,...

An enlarged cylindrical-anode-layer Hall plasma accelerator with an outlet diameter of 150 mm is experimentally demonstrated to produce a concentrated ion beam, especially at high discharge voltage, current utilization efficiency up ∼0.9. Numerical investigation based on the three-dimensional particle-in-cell method performed study dynamics and elucidate origin beam characteristics. The simulation results reveal that equipotential lines play important role in surface near anode emitting...

The hydrogenous diamond-like carbon (DLC) films deposited on Si substrates using pulsed glow discharge method are investigated Raman spectroscopy and X-ray photoelectron method. UV spectrum for excitation wavelength is 325 nm. particularly useful DLC, as it gives clear measurements in the D G peak spectral region even highly hydrogenated samples, which visible spectra overshadowed by photoluminescence. sp3 bonding of DLC film can be effectively studied method, data from compared with...

To enhance the overall performance of regenerative flow pump (RFP) to achieve efficient and stable operation over a broad range, this paper employs numerical simulation study internal conditions RFP models with three different inclination coefficients (Ic = −0.25, Ic 0, 0.25). The analysis focuses on pressure distribution, energy exchange, velocity variation, vorticity distribution characteristics within impeller channel. comparison indicates that at −0.25 an outward channel, is stabilized,...