Currently, there is a need for dynamic space missions based on small satellites. These can be supported by propulsion systems with thrust-vectoring capabilities. This capability realized electrodeless plasma thrusters (EPTs). EPTs stand out their versatility, offering adjustable thrust characteristics and fewer components, making them ideal However, efficiency remains below optimal levels, largely due to complexities in acceleration. research aims better understand dominant acceleration...

Wave plasma sources (WPSs) were first proposed in the 1970s for electric propulsion (EP), and these research development processes culminated flight test 2021 of WPS-based thruster REGULUS. Recently, new approaches to WPS use have emerged—multiple schemes EPs that can generate propelling forces multiple directions within a single head, regarded as breakthrough technology in-space systems (PSs). One concepts is bi-directional wave based on open-ended gas discharge chamber—the symmetrical...

The results of direct thrust measurements the thruster with multiple vectoring capability utilizing Kr are presented. is a 2U size system. tested bi-directional plasma consists head, inbuilt rf generator creating 9 MHz current applied to antenna, power supply for set electromagnets, and control head open-ended gas discharge chamber, antenna. During measurements, magnitude configuration external static magnetic field, propellant flow rate, modes changed. field in units adjusted range 3…5 A....

Multidirectional plasma thrusters are of particular interest for dynamic space missions due to the adjustability their integral characteristics. One type multidirectional is -directional, consisting a symmetric electromagnetic system surrounding gas discharge chamber, capable generating propulsion minimum in two directions. The experimental results this study starting modes thruster utilizing krypton as propellant reported. placed vacuum chamber. magnetic field strength adjusted range 35 400...

This study discusses the main features of irradiation prospective multilayer coatings by VUV/UV radiation from compressed plasma flows. Such is characterized a broadband spectrum and high brightness fluxes. Oxide Mo/Si bilayers were used as basis reflective multilayers for visible UV ranges. A gas-dynamic response irradiated surfaces was studied with schlieren photography. The properties original described ultra violet infrared spectroscopy (UV-Vis-IR), X-ray diffraction (XRD),...

Obtaining new data on the gas-dynamic responses from polymer samples (polytetrafluoroethylene, PTFE) irradiated by powerful VUV radiation compressed plasma flows is in focus of present study. An erosion type magnetoplasma compressor (MPC), a discharge, was used as source. The operating voltages MPC were between 15 and 25 kV, maximum measured discharge current 200 kA, energy range ≈1-2 kJ. fluxes sample surface high equal to ≈1022-1024 photons cm-2·s-1. Double-exposure laser holographic...

The paper presents the experimental study of using gas detonation for spraying hydroxyapapite (HOA) particles onto carbon nanocomposites. characteristic parameters heterophasic flows were defined. prepared films (with a thickness 80...100 μm) polycrystalline with Ca and P concentration ratio ≈1.67 as raw HOA. It was noted about prospects HOA spraying.

The paper deals with the use of a helicon engine in outboard air to maintain small space vehicle (SSV) low earth orbit. concept spacecraft an on is proposed. authors showed that such successful solution for maintaining orbits up 200 km SSC cross-sections = 1 m2 and shape coefficient cf ≤ 3.

The results of combined electrooptical breakdown (DC E∼0-13.2 kV/cm + laser λ-213, 266, 355, 532, 1064 nm, τ0,5∼18 ns, I0∼109-1011 W/cm2) gases (He, Ne, Ar, Kr) and their binary triple mixtures at subatmospheric pressure (101-105 Pa) experimental investigation are presented for the first time. Thresholds optical, electrical those were experimentally determined. possibility threshold components decrease simultaneous optical impact on gas, lowering thresholds doped have been investigated.

The investigations of dynamics and macrostructure (spatial temporal distributions charged particles) optic-plasmadynamic discharges with light erosion mechanism plasma formation generation accelerated gas–plasma flows various chemical composition in the wide range dynamic energy & power characteristics are presented. was heated as a result thermalization due to shock interaction high kinetic gas medium, which works stopping barrier for such discharges. It shown that deceleration radially...

We present the results of powerful (i.e. ionizing) wide band (with photon energy from visible to VUV) radiation interaction with condensed matters. used a source power up 107 W/cm2 and processes duration 10−6-10−5 s. At schlieren interferograph photos it is that gasdynamic evaporation mode (the plasma piston) implemented: there shock wave in gas, contact border between gas vapors plasma. There received thermodynamic parameters distribution on height vapours over target. The maximum...

Abstract The Air-Breathing Helicon Plasma Thruster, a thruster utilizing ambient air which is suggested to support small spacecraft on very low Earth’s orbits, has been tested successfully. Using retarding field energy analyser and Langmuir probe, the specific impulse have confirmed for operating conditions of 1.5 mg·s −1 air, 50 mPa gas pressure, 120 W radio-frequency forward power at 13.56 MHz, maximum axial magnetic 200 G km attitude. inductively coupled plasma ion beam formed...

Laser-induced plasma has been considered for multiple applications by the moment, and its characteristics strongly depend on laser radiation parameters. Reaching demanded values latter might be rather costly, but, in certain cases, similar or even better results could reached case of additional impact (optical, electric, magnetic, corpuscular, mechanical etc.). Combined effects are mainly based target properties interaction mechanism change, found to decrease generation thresholds orders...

Laser-induced ignition for internal combustion engines is investigated intensively after demonstration of a compact 'laser plug' possibility. Laser spark benefits as compared to traditional plugs are higher compression rate, and possibility almost any fuel ignition, so lean mixtures burning with lower temperatures could reduce harmful exhausts (NOx, CH, etc). No need in electrode multi-point, linear or circular can make even more effective. induced wave appears faster stable time, than...

Minimum ignition energy (MIE) values for electric spark have been calculated and experimentally evaluated long ago, but laser significantly higher were found, as explained, due to shorter duration smaller size of the impact region. The feature breakdown is high input rate in discharge channel. For ignition, depends on gas spectral absorption. So only a small part incident may be deposited near threshold. MIE certain mixture contents pressure expected independent way deposition. There mess...

The dynamics and macrostructure of near-surface vapor-plasma fluxes arising from condensed substances evaporation in the field broadband radiation UV-VUV spectrum range are studied using double-exposure laser holographic interferometry schlieren photography (the Toepler scheme light mode).The experimental setup was created on basis unique scientific facility "Beam-M".Broadband UV VUV generated by a plasma-dynamic emitting discharge an end geometry coaxial erosion-type magnetoplasma...