scholarly journals Influence of Azimuthally Nonuniform Propellant Flow Rate on Thrust Vector and Discharge Current Oscillation in a Hall Thruster

2009 ◽  
Vol 7 (ists26) ◽  
pp. Pb_41-Pb_45
Author(s):  
Yasuhiro FUKUSHIMA ◽  
Shigeru YOKOTA ◽  
Kimiya KOMURASAKI ◽  
Yoshihiro ARAKAWA
Keyword(s):  
Flow Rate ◽  
Discharge Current ◽  
Current Oscillation ◽  
Hall Thruster ◽  
Thrust Vector

scholarly journals Numerical Analysis of the Sheath Structure and Discharge Current Oscillation in an Anode-Layer Hall Thruster

2006 ◽  
Vol 54 (632) ◽  
pp. 413-418
Author(s):  
Shigeru Yokota ◽  
Shinsuke Yasui ◽  
Ken Kumakura ◽  
Kimiya Komurasaki ◽  
Yoshihiro Arakawa
Keyword(s):  
Numerical Analysis ◽  
Discharge Current ◽  
Current Oscillation ◽  
Hall Thruster ◽  
Anode Layer ◽  
Sheath Structure

Application of Spread Spectrum for Discharge Current Oscillation in TAL-type Hall Thruster

2021 ◽  
Vol 20 (0) ◽  
pp. 91-96
Author(s):  
Kenshin Nagamine ◽  
Ryota Takahashi ◽  
Taichiro Tamida ◽  
Haruki Takegahara ◽  
Akira Kakami
Keyword(s):  
Discharge Current ◽  
Spread Spectrum ◽  
Current Oscillation ◽  
Hall Thruster

scholarly journals Параметрическое исследование двух устойчивых форм горения разряда в холловском двигателе

2019 ◽  
Vol 89 (9) ◽  
pp. 1360
Author(s):  
И.А. Хмелевской ◽  
Д.А. Томилин
Keyword(s):  
Flow Rate ◽  
Discharge Current ◽  
Gas Flow ◽  
Electronic Conductivity ◽  
Discharge Voltage ◽  
Hall Thruster ◽  
Discharge Zone ◽  
Gas Flow Rate ◽  
Anode Efficiency ◽  
Input Parameters

In this paper the behavior of the integral parameters of the Hall thruster (thrust, specific thrust impulse) in two stable discharge modes were experimentally investigated. This modes significantly different from each other in anode efficiency. The studies were carried out on a laboratory model of Hall thruster with the external discharge zone with the middle-line diameter equal to 77 mm. The discharge voltage was in the range of 500-900 V and a gas flow rate was from 2.0 to 5 mg/s. The most striking differences between the discharge modes are the shape of the plasma plume and the value of the discharge current at practically identical input parameters of operation (gas flow rate, discharge voltage, magnetic field). It is shown that in the entire studied range of input parameters during the transition from the optimal mode (in terms of the efficiency) to the suboptimal mode the main integral characteristics of the thruster suddenly change: the discharge current increases by 10-30% with the simultaneous relative drop of thrust by 5-15% and efficiency by 20-40%. A detailed study of the structure of the anode efficiency showed that when the transition between modes occurs the electron current efficiency (the ratio of the ion current to the discharge current) abruptly changes, that is, the electronic conductivity in the discharge channel of the thruster changes too.

scholarly journals Background Pressure Effects on the Performance of a 20 kW Magnetically Shielded Hall Thruster Operating in Various Configurations

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 69
Author(s):  
Antonio Piragino ◽  
Farbod Faraji ◽  
Maryam Reza ◽  
Eugenio Ferrato ◽  
Annalisa Piraino ◽  
...  
Keyword(s):  
Mass Flow ◽  
Discharge Current ◽  
Pressure Effects ◽  
Hall Thruster ◽  
Physical Processes ◽  
Linear Behavior ◽  
Mass Flow Rates ◽  
Anode Mass ◽  
Lower Background ◽  
Operating Regimes

The paper reports the characterization results of a 20 kW-class magnetically shielded Hall thruster in three different configurations and operating with a centrally mounted cathode. The characterization was carried out at two different pumping speeds in SITAEL’s IV10 vacuum chamber, resulting in two different background pressure levels for each tested operating point. A linear behavior of discharge current and thrust values versus the anode mass flow rate was noticed for both pumping speeds levels and for all the three configurations. In addition, the thrust and discharge current values were always found to be lower at lower background pressure levels. From the performance levels, a preliminary estimate of the ingested mass flow rates was performed, and the values were then compared to a recently developed background flow model. The results suggested that, for this thruster and in the tested operating regimes, the change in performance due to background pressure could be ascribed not only to the ingestion of external mass flow coming from the chamber but also to other physical processes caused by the flux of residual background neutrals.

scholarly journals Numerical and Experimental Investigation of Longitudinal Oscillations in Hall Thrusters

Aerospace ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 148
Author(s):  
Vittorio Giannetti ◽  
Manuel Martín Saravia ◽  
Luca Leporini ◽  
Simone Camarri ◽  
Tommaso Andreussi
Keyword(s):  
Discharge Current ◽  
Fluid Model ◽  
Low Frequency ◽  
Hall Thruster ◽  
Hall Thrusters ◽  
Current Signal ◽  
Plasma Parameters ◽  
Plasma Properties ◽  
Breathing Mode ◽  
Spatio Temporal

One of the main oscillatory modes found ubiquitously in Hall thrusters is the so-called breathing mode. This is recognized as a relatively low-frequency (10–30 kHz), longitudinal oscillation of the discharge current and plasma parameters. In this paper, we present a synergic experimental and numerical investigation of the breathing mode in a 5 kW-class Hall thruster. To this aim, we propose the use of an informed 1D fully-fluid model to provide augmented data with respect to available experimental measurements. The experimental data consists of two datasets, i.e., the discharge current signal and the local near-plume plasma properties measured at high-frequency with a fast-diving triple Langmuir probe. The model is calibrated on the discharge current signal and its accuracy is assessed by comparing predictions against the available measurements of the near-plume plasma properties. It is shown that the model can be calibrated using the discharge current signal, which is easy to measure, and that, once calibrated, it can predict with reasonable accuracy the spatio-temporal distributions of the plasma properties, which would be difficult to measure or estimate otherwise. Finally, we describe how the augmented data obtained through the combination of experiments and calibrated model can provide insight into the breathing mode oscillations and the evolution of plasma properties.

Improving the Hall Thruster Global Efficiency over a Wide Flow-Rate Range

2021 ◽  
pp. 1-9
Author(s):  
Hao-tian Fan ◽  
Hong Li ◽  
Wei Mao ◽  
Yong-Jie Ding ◽  
Li-Qiu Wei ◽  
...  
Keyword(s):  
Flow Rate ◽  
Hall Thruster ◽  
Rate Range ◽  
Global Efficiency ◽  
Flow Rate Range

Discharge current of water electrospray with electrical conductivity under high-voltage and high-flow-rate conditions

2020 ◽  
Vol 118 ◽  
pp. 110151
Author(s):  
Soyeon Kim ◽  
Minkyu Jung ◽  
Sangmi Choi ◽  
Jinwook Lee ◽  
Jihun Lim ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Flow Rate ◽  
High Voltage ◽  
Discharge Current ◽  
High Flow ◽  
High Flow Rate

scholarly journals Discharge Current Oscillation in Hall Thrusters

2005 ◽  
Vol 21 (5) ◽  
pp. 870-876 ◽  
Author(s):  
Naoji Yamamoto ◽  
Kimiya Komurasaki ◽  
Yoshihiro Arakawa
Keyword(s):  
Discharge Current ◽  
Current Oscillation ◽  
Hall Thrusters

Particle simulation of discharge current oscillation in Hall thrusters

Vacuum ◽  
2008 ◽  
Vol 83 (1) ◽  
pp. 61-66 ◽  
Author(s):  
Takeshi Miyasaka ◽  
Yuuki Shibata ◽  
Katuo Asato
Keyword(s):  
Discharge Current ◽  
Current Oscillation ◽  
Particle Simulation ◽  
Hall Thrusters
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