Three-Dimensional Particle Simulations of Ion Propulsion Plasma Environment for Deep Space 1

2001 ◽  
Vol 38 (3) ◽  
pp. 433-440 ◽  
Author(s):  
J. Wang ◽  
D. Brinza ◽  
M. Young
Keyword(s):  
Three Dimensional ◽  
Deep Space ◽  
Plasma Environment ◽  
Ion Propulsion ◽  
Particle Simulations

Deep Space One Investigations of Ion Propulsion Plasma Environment

2000 ◽  
Vol 37 (5) ◽  
pp. 545-555 ◽  
Author(s):  
J. Wang ◽  
D. E. Brinza ◽  
D. T. Young ◽  
J. E. Nordholt ◽  
J. E. Polk ◽  
...  
Keyword(s):  
Deep Space ◽  
Plasma Environment ◽  
Ion Propulsion

Nuclear electric ion propulsion for three deep space missions

2008 ◽  
Vol 62 (6-7) ◽  
pp. 374-390 ◽  
Author(s):  
Vincent P. Chiravalle
Keyword(s):  
Space Missions ◽  
Deep Space ◽  
Ion Propulsion

scholarly journals Reconstruction of Pressureless Sintered Micron Silver Joints and Simulation Analysis of Elasticity Degradation in Deep Space Environment

2020 ◽  
Vol 10 (18) ◽  
pp. 6368
Author(s):  
Wendi Guo ◽  
Guicui Fu ◽  
Bo Wan ◽  
Ming Zhu
Keyword(s):  
Microstructural Evolution ◽  
Mechanical Response ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Effective Elastic Modulus ◽  
Space Environment ◽  
Analytical Models ◽  
Deep Space ◽  
Sem Images ◽  
Element Analysis

With excellent economy and properties, pressureless sintered micron silver has been regarded as an environmentally friendly interconnection material. In order to promote its reliable application in deep space exploration considering the porous microstructural evolution and its effect on macroscopic performance, simulation analysis based on the reconstruction of pressureless sintered micron silver joints was carried out. In this paper, the deep space environment was achieved by a test of 250 extreme thermal shocks of −170 °C~125 °C, and the microstructural evolution was observed by using SEM. Taking advantage of the morphology autocorrelation function, three-dimensional models of the random-distribution medium consistent with SEM images were reconstructed, and utilized in further Finite Element Analysis (FEA) of material effective elastic modulus through a transfer procedure. Compared with test results and two analytical models, the good consistency of the prediction results proves that the proposed method is reliable. Through analyzing the change in autocorrelation functions, the microstructural evolution with increasing shocks was quantitively characterized. Mechanical response characteristics in FEA were discussed. Moreover, the elasticity degradation was noticed and the mechanism in this special environment was clarified.

scholarly journals Ion Propulsion Development Projects in U.S.: Space Electric Rocket Test I to Deep Space 1

2001 ◽  
Vol 17 (3) ◽  
pp. 517-526 ◽  
Author(s):  
James S. Sovey ◽  
Vincent K. Rawlin ◽  
Michael J. Patterson
Keyword(s):  
Development Projects ◽  
Deep Space ◽  
Ion Propulsion

scholarly journals Planetary magnetic field control of ion escape from weakly magnetized planets

2019 ◽  
Vol 488 (2) ◽  
pp. 2108-2120 ◽  
Author(s):  
Hilary Egan ◽  
Riku Jarvinen ◽  
Yingjuan Ma ◽  
David Brain
Keyword(s):  
Magnetic Field ◽  
Effective Interaction ◽  
Three Dimensional ◽  
Power Laws ◽  
Wind Pressure ◽  
Escape Rate ◽  
Opening Angle ◽  
Plasma Environment ◽  
Ion Escape ◽  
Planetary Magnetic Field

ABSTRACT Intrinsic magnetic fields have long been thought to shield planets from atmospheric erosion via stellar winds; however, the influence of the plasma environment on atmospheric escape is complex. Here we study the influence of a weak intrinsic dipolar planetary magnetic field on the plasma environment and subsequent ion escape from a Mars-sized planet in a global three-dimensional hybrid simulation. We find that increasing the strength of a planet’s magnetic field enhances ion escape until the magnetic dipole’s standoff distance reaches the induced magnetosphere boundary. After this point increasing the planetary magnetic field begins to inhibit ion escape. This reflects a balance between shielding of the Southern hemisphere from ‘misaligned’ ion pickup forces and trapping of escaping ions by an equatorial plasmasphere. Thus, the planetary magnetic field associated with the peak ion escape rate is critically dependent on the stellar wind pressure. Where possible we have fit power laws for the variation of fundamental parameters (escape rate, escape power, polar cap opening angle, and effective interaction area) with magnetic field, and assessed upper and lower limits for the relationships.

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