scholarly journals Low frequency azimuthal stability of the ionization region of the Hall thruster discharge. II. Global analysis

2015 ◽  
Vol 22 (10) ◽  
pp. 102114 ◽  
Author(s):  
D. Escobar ◽  
E. Ahedo
Keyword(s):  
Global Analysis ◽  
Low Frequency ◽  
Hall Thruster ◽  
Ionization Region

Low-frequency-oscillation characteristics of ionization distribution in Hall thruster channels

Vacuum ◽  
2021 ◽  
pp. 110320
Author(s):  
Tianyuan Ji ◽  
Liqiu Wei ◽  
Haifeng Lu ◽  
Shangmin Wang ◽  
Ning Guo ◽  
...  
Keyword(s):  
Low Frequency ◽  
Hall Thruster ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Oscillation Characteristics

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.

High-Frequency Instabilities and Low-Frequency Dynamics in Hall Thruster Plasma

2004 ◽  
Author(s):  
Alexey Lazurenko ◽  
Vanessa Vial ◽  
Luc Albarede ◽  
Michel Dudeck ◽  
Andre Bouchoule
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Hall Thruster

scholarly journals Plasma Properties of Low Frequency Oscillation Phenomena in a Hall Thruster.

2000 ◽  
Vol 48 (561) ◽  
pp. 336-342 ◽  
Author(s):  
Takeshi FURUKAWA ◽  
Yasuyuki SAKURAI ◽  
Takeshi MIYASAKA ◽  
Toshi FUJIWARA
Keyword(s):  
Low Frequency ◽  
Hall Thruster ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Plasma Properties

Flow Induced Motions on Multi Column Floaters

2007 ◽  
Author(s):  
Olaf J. Waals ◽  
Amal C. Phadke ◽  
Stephen Bultema
Keyword(s):  
Frequency Response ◽  
Global Analysis ◽  
Low Frequency ◽  
Mass Ratio ◽  
Complex Flow ◽  
Lower Mass ◽  
Steady Current ◽  
Calm Water ◽  
Mean Current ◽  
Motion Behavior

Recent years have shown an increasing interest in low frequency response of offshore floaters in current. Spar VIM behavior and Semi Submersible flow induced behavior is known from calm water tow tests. Recent tow test projects have also shown low frequency TLP response in steady current. The motions from the model tests are used in the global analysis of the mooring systems and risers for these platforms. This paper discusses the dynamic behavior in current of multi column floaters and the associated complex flow patterns. Shielding between columns is addressed as well as the effect of mass ratio (i.e. floater mass divided by displacement). It is shown that lower mass ratios such as for conventional TLP’s may result in larger sway response than for deep draft semi submersibles. The motion behavior is discussed as well as the increase in total mean current loads due to transverse motions.

Determining parameter sets for low-frequency-oscillation-free operation of Hall thruster

2007 ◽  
Vol 102 (4) ◽  
pp. 043304 ◽  
Author(s):  
Taichiro Tamida ◽  
Takafumi Nakagawa ◽  
Ikuro Suga ◽  
Hiroyuki Osuga ◽  
Toshiyuki Ozaki ◽  
...  
Keyword(s):  
Low Frequency ◽  
Hall Thruster ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation
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