scholarly journals Clementine images of the lunar sample-return stations: Refinement of FeO and TiO2mapping techniques

1997 ◽  
Vol 102 (E7) ◽  
pp. 16319-16325 ◽  
Author(s):  
David T. Blewett ◽  
Paul G. Lucey ◽  
B. Ray Hawke ◽  
Bradley L. Jolliff
Keyword(s):  
Lunar Sample ◽  
Sample Return

Research on Sealing Structure and Ground Test of Lunar Sample Return Devices

2013 ◽  
Author(s):  
Bin Zhang ◽  
Min Yu ◽  
Huayong Yang ◽  
Haocen Hong
Keyword(s):  
High Vacuum ◽  
Extreme Temperature ◽  
Leak Detection ◽  
Ultra High Vacuum ◽  
Knife Edge ◽  
Lunar Sample ◽  
Test Environment ◽  
Sample Return ◽  
Rubber Ring ◽  
Advantages And Disadvantages

This article is in the background of lunar exploration program, which requires unmanned operation in the environment of ultra high vacuum, extreme temperature, strong radiation and lunar dust. Seal reliability of lunar sample return devices should be guaranteed as well. Principal prototype devices of explosive welding seal and brazing seal are analyzed separately when applied to lunar program, both of their advantages and disadvantages are indicated, and improved schemes are given as well. Besides, a redundant seal combined with o type rubber ring and knife edge indium alloy is put forward, to validate its reliability, a mathematical model based on Roth theory has been developed to describe sealing mechanism and predict the variable leakage, and the ground tests on leak detection for rubber seal and knife edge seal have been set up separately through helium mass spectrometer. According to the test results, nitrile rubber is proved to be better because of its resilience in alternative temperature, lower leakage and permeation. The knife edge indium seal has lower leak rate, and the welding joint quality of indium alloy itself can be guaranteed as well. The redundant seal is considered to have preliminary feasibility while the test environment for leak detection is required to simulate lunar surface still further.

Scientific Objectives and Payloads of the Lunar Sample Return Mission—Chang’E-5

2021 ◽  
Author(s):  
Changyi Zhou ◽  
Yingzhuo Jia ◽  
Jianzhong Liu ◽  
Huijun Li ◽  
Yu Fan ◽  
...  
Keyword(s):  
Lunar Sample ◽  
Sample Return ◽  
Sample Return Mission

scholarly journals Detailed Morphologic Mapping and Traverse Planning for a Rover-based Lunar Sample Return Mission to Schrödinger Basin

2021 ◽  
Vol 2 (4) ◽  
pp. 167
Author(s):  
Zachary R. Morse ◽  
Gordon R. Osinski ◽  
Livio L. Tornabene ◽  
Matthew Bourassa ◽  
Michael Zanetti ◽  
...  
Keyword(s):  
Lunar Sample ◽  
Sample Return ◽  
Sample Return Mission

Challenges and options for an affordable small Lunar Sample Return Mission

2006 ◽  
Author(s):  
Dr. Adam M. Baker ◽  
Andy Phipps ◽  
Martin Sweeting ◽  
Alex Ellery ◽  
Yang Gao
Keyword(s):  
Lunar Sample ◽  
Sample Return ◽  
Sample Return Mission

Global scale lunar sample return using projectiles launched from a low-flying spacecraft

2007 ◽  
Vol 39 (4) ◽  
pp. 627-635 ◽  
Author(s):  
Ian Garrick-Bethell ◽  
Erwan Mazarico ◽  
Wesley Andrés Watters
Keyword(s):  
Global Scale ◽  
Lunar Sample ◽  
Sample Return

S1910104 A Concept of Small Probe for Lunar Sample Return and Earth Reentry

2015 ◽  
Vol 2015 (0) ◽  
pp. _S1910104--_S1910104-
Author(s):  
Takayuki SHIMODA ◽  
Kei-ichi OKUYAMA ◽  
Sean Lee TUTTLE ◽  
Kazuhiko YAMADA ◽  
Sumio KATO ◽  
...  
Keyword(s):  
Lunar Sample ◽  
Sample Return ◽  
Small Probe

Leakage analysis and ground tests of knife edge indium seal to lunar sample return devices

2018 ◽  
Vol 233 (6) ◽  
pp. 2010-2022 ◽  
Author(s):  
Bin Zhang ◽  
Haocen Hong ◽  
Min Yu ◽  
Huayong Yang
Keyword(s):  
Leak Rate ◽  
Knife Edge ◽  
Lunar Sample ◽  
Element Analysis ◽  
Sample Return ◽  
Pressing Force ◽  
Sealing Performance ◽  
Lunar Samples ◽  
Ring Seal ◽  
Key Techniques

This work deals with the lunar sample return project, which requires lunar samples to be returned back to the ground without contamination. In this paper, a knife edge indium seal is proposed as a primary sealing form, where indium–silver alloy is welded into an annular groove of a cylindrical container firstly and then extruded by an annular knife edge of a cylindrical lid. The analysis of the leakage and sealing reliability of knife edge indium seal is the main aim of this paper. Firstly, the pretreatment of knife edge indium seal is discussed. Key techniques on indium welding are studied to evaluate its sealing reliability, with the tensile strength and welding void ratio mainly being discussed. Secondly, by means of “Roth” leakage theory, mathematical models on the leak rate for knife edge seal are established. By means of the finite element analysis, the knife edge geometry is optimized with minimum pressing force required. The results justify that the knife edge seal demands much lower pressing force to achieve a considerable sealing performance, which is suitable for low-powered operation. Finally, the ground tests are carried out to evaluate the feasibility of the indium welding and to measure the leak rate of the knife edge indium seal. Experimental results demonstrate the indium welding onto the stainless steel container is feasible, and the leak rate at room temperature is 3.0 × 10−10 Pa·m3/s, which is much lower than the rubber O-type ring seal. The knife edge indium seal is suitable for lunar sample return devices.

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