Characteristics of Microwave Emissions from Hypervelocity Impacts on Pure Aluminum and Various Aluminum Alloy Plates

Paper number

IAC-18,A6,3,2,x45439

Author

Mr. Yuki Mando, Japan, The Graduate University for Advanced Studies

Coauthor

Prof. Koji Tanaka, Japan, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)

Coauthor

Dr. Eriko Soma, Japan, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)

Coauthor

Prof. Ichiro Shiota, Japan, Kogakuin University

Coauthor

Mr. Tatsuya Yamagami, Japan, Hosei University

Coauthor

Mr. Shuichi Haseba, Japan

Coauthor

Mr. Shotaro Katano, Japan, The Graduate Universty for Advanced Studies (SOKENDAI)

Coauthor

Ms. Misato Yoneyama, Japan

Year

2018

Abstract

Space debris are traveling at the velocity of 7-8 km/s in low Earth orbit and the collision between spacecraft can affect a significant damage. Hypervelocity impact generates not only mechanical phenomena such as crater and secondary debris but also electrical ones such as radio frequency (RF) emission, plasma generation, flash, and variation in electrical potential of the impacted target. However, the mechanism of the RF emission has not been verified. There is a possibility that factors of the mechanism are considered as the combinations of a projectile and a target, and the impact velocity. In the target, there are a lot of parameters such as material, composition, size, and thickness. So far, it was difficult to discuss the relationship between the parameters and the phenomenon of RF emission. 
  We conducted the hypervelocity impacts using a two-stage light gas gun and measured the electrical phenomena at the same time. To minimize the parameters, we used 7mm-diameter nylon sphere with the impact velocity of approximately 7 km/s for projectiles and a pure aluminum and various aluminum alloy plates for targets. In this paper, the characteristics of microwave emissions from hypervelocity impacts on various aluminum plates will be described. 

Abstract document

IAC-18,A6,3,2,x45439.brief.pdf

Manuscript document

IAC-18,A6,3,2,x45439.pdf (🔒 authorized access only).

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