scholarly journals Numerical mathematical model for calculating ion density in the gas-discharge chamber of a radio-frequency ion thruster

2020 ◽  
Vol 1479 ◽  
pp. 012057
Author(s):  
S V Gordeev ◽  
S V Kanev ◽  
S A Khartov
Keyword(s):  
Mathematical Model ◽  
Radio Frequency ◽  
Discharge Chamber ◽  
Gas Discharge ◽  
Ion Density ◽  
Ion Thruster

scholarly journals POLYMER PRECURSORS FOR CREATING GAS DISCHARGE CHAMBER FOR ELECTRIC ROCKET ENGINE

2020 ◽  
Vol 17 (35) ◽  
pp. 560-568
Author(s):  
Vladislav V. NIGMATZYANOV ◽  
Veniamin A. POGODIN ◽  
Lev N. RABINSKIY ◽  
Sergey A. SITNIKOV ◽  
Thant ZIN HEIN
Keyword(s):  
Silicon Nitride ◽  
High Frequency ◽  
Electric Propulsion ◽  
Discharge Chamber ◽  
Ceramic Materials ◽  
Gas Discharge ◽  
Woven Fabrics ◽  
Total Power ◽  
Gravimetric Analysis ◽  
Ion Thruster

Electric rocket engines are widely used in space technology. Furthermore, at present, electric propulsion engines are also used as mid-flight engines for flights in interplanetary space. On modern spacecraft, the following types of electric propulsion are mostly used: SPT and grid ion thruster. When using these engines as sustainers, it is important is to increase the total power for obtaining the required thrust and specific impulse. With an increase in total power, the volume of the discharge chamber increases, which leads to technological difficulties in the manufacture of discharge chambers from ceramic materials. Thus, the task of finding alternative ceramic materials is relevant and necessary in the development of high-frequency ion thrusters. The article discusses the issues of creating a composite material based on woven quartz materials and organosilicon binder as a precursor filled with silicon nitride for the manufacture of gas discharge chamber (GDC) of high-frequency ion thruster (RFIT). By thermos-gravimetric analysis, a thermosetting binder, which meets the requirements of vibration resistance and electromagnetic permeability of GDC in the megahertz range, was selected. Based on the binder filled with silicon nitride powder, reinforced by quartz woven fabrics, manufactured GDC. The resulting product was tested as part of the laboratory electric propulsion device with a diameter of 100 mm and power of 200W.

scholarly journals Sputtering of Mo and Ag with xenon ions from a radio-frequency ion thruster

2021 ◽  
Vol 92 (4) ◽  
pp. 045109
Author(s):  
L. J. Buntrock ◽  
C. Volkmar ◽  
K. Hannemann
Keyword(s):  
Radio Frequency ◽  
Ion Thruster

The impact of neutralizer-free ignition of a radio frequency ion thruster on the lifetime of the ion optics system

2021 ◽  
pp. 2140017
Author(s):  
Long-Fei Ma ◽  
Li Duan ◽  
Jian-Wu He ◽  
Qi Kang ◽  
Keyword(s):  
Radio Frequency ◽  
Pyrolytic Graphite ◽  
High Strength ◽  
Surface Damage ◽  
External Source ◽  
Ion Thruster ◽  
Neutral Gas ◽  
Discharge Ignition ◽  
Ion Optical System ◽  
The Impact

In the initial stage of a radio frequency ion thruster (RIT) ignition, an influx of electrons is required from an external source into the discharge chamber and ionization of the neutral gas propellant. A neutralizer-free method for Townsend breakdown discharge ignition based on Paschen’s law was developed in this study. The feasibility of the ignition method was confirmed by performing thousands of ignition experiments. Metallic Molybdenum (Mo), pyrolytic graphite (PG) and Zr[Formula: see text]Ti[Formula: see text]Cu[Formula: see text]Ni[Formula: see text]Be[Formula: see text]alloy acceleration grids were prepared, and ignition-induced damage on the grids was investigated. A field-emission scanning electron microscope was used to inspect surface damage on the grids after multiple ignitions and to analyze the influence of the ignition method on the lifetime of the ion optical system. Grid materials for space missions that require multiple RIT ignitions (10[Formula: see text] should be high-strength blocks that are resistant to sputtering corrosion and high temperature.

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