Fully-Kinetic Particle-in-Cell Simulations of Photoelectron Sheath and Dust Levitation on Uneven Lunar Surface

2021 ◽  
Author(s):  
Jianxun Zhao ◽  
Xinpeng Wei ◽  
Xiaoming He ◽  
Daoru Han ◽  
Xiaoping Du
Keyword(s):  
Lunar Surface ◽  
Particle In Cell ◽  
Photoelectron Sheath ◽  
Dust Levitation

Adaptive Kriging Method for Uncertainty Quantification of the Photoelectron Sheath and Dust Levitation on the Lunar Surface

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Xinpeng Wei ◽  
Jianxun Zhao ◽  
Xiaoming He ◽  
Zhen Hu ◽  
Xiaoping Du ◽  
...  
Keyword(s):  
Uncertainty Quantification ◽  
Lunar Surface ◽  
Kriging Model ◽  
Upper And Lower Bounds ◽  
Model Parameters ◽  
Kriging Method ◽  
Photoelectron Sheath ◽  
The One ◽  
Adaptive Kriging ◽  
Dust Levitation

Abstract This paper presents an adaptive Kriging based method to perform uncertainty quantification (UQ) of the photoelectron sheath and dust levitation on the lunar surface. The objective of this study is to identify the upper and lower bounds of the electric potential and that of dust levitation height, given the intervals of model parameters in the one-dimensional (1D) photoelectron sheath model. To improve the calculation efficiency, we employ the widely used adaptive Kriging method (AKM). A task-oriented learning function and a stopping criterion are developed to train the Kriging model and customize the AKM. Experiment analysis shows that the proposed AKM is both accurate and efficient.

Photoelectron Sheath and Plasma Charging on the Lunar Surface: Semianalytic Solutions and Fully-Kinetic Particle-in-Cell Simulations

2021 ◽  
Vol 49 (10) ◽  
pp. 3036-3050
Author(s):  
Jianxun Zhao ◽  
Xinpeng Wei ◽  
Xiaoping Du ◽  
Xiaoming He ◽  
Daoru Han
Keyword(s):  
Lunar Surface ◽  
Particle In Cell ◽  
Photoelectron Sheath

scholarly journals A comparison of ARTEMIS observations and particle-in-cell modeling of the lunar photoelectron sheath in the terrestrial magnetotail

2012 ◽  
Vol 39 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. R. Poppe ◽  
J. S. Halekas ◽  
G. T. Delory ◽  
W. M. Farrell ◽  
V. Angelopoulos ◽  
...  
Keyword(s):  
Particle In Cell ◽  
Cell Modeling ◽  
Photoelectron Sheath

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

A Photographic Map of the Moon

1962 ◽  
Vol 14 ◽  
pp. 113-115
Author(s):  
D. W. G. Arthur ◽  
E. A. Whitaker
Keyword(s):  
Lunar Surface ◽  
The Moon ◽  
Map Projection

The cartography of the lunar surface can be split into two operations which can be carried on quite independently. The first, which is also the most laborious, is the interpretation of the lunar photographs into the symbolism of the map, with the addition of fine details from telescopic sketches. An example of this kind of work is contained in Johann Krieger'sMond Atlaswhich consists of photographic enlargements in which Krieger has sharpened up the detail to accord with his telescopic impressions. Krieger did not go on either to convert the photographic picture into the line symbolism of a map, or to place this picture on any definite map projection.

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