Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session IT4: Poster Session I; Exhibition & Coffee (4:00pm-6:00pm)
4:00 PM,
Tuesday, October 10, 2023
Room: Michigan League, Ballroom
Abstract: IT4.00071 : Plasma Structure Observed in a 94 GHz Microwave Rocket*
Presenter:
Maho Matsukura
(Tohoku University)
Authors:
Maho Matsukura
(Tohoku University)
Soichiro Suzuki
(Tohoku University)
Toshiki Yamada
(Tohoku Univ)
Masayuki Takahashi
(Tohoku University)
The shock wave directly affects the propulsion performance of microwave rockets and is given energy depending on the cone angle of a sphere that spreads isotropically in all directions, thus the cone angle is directly related to the propulsion performance. Therefore, this study mainly reports the effect of cone angle on the propulsion performance by observing the thrust and a plasma structure. In the experiment, the microwave source was a gyrotron, which was a high-power microwave oscillation source being considered as a rocket base. The rocket body was a translucent cylinder in order to observe the internal plasma structure, and the effect of the apex part can be easily observed. Moreover, a microwave beam energy transmitted from the ground launch base is assumed to propagate several tens of kilometers above the ground. Thus, in this study, it was chosen a frequency of 94 GHz because it had high linearity and atmospheric attenuation was lower than that of a terahertz wave.
*This work was supported by JSPS KAKENHI Grant Number JP23KJ0089.
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