Enhancement of momentum coupling efficiency using repetitive pulse ablation

Shigeaki Uchida; Kazuo Imasaki; Xianglin Zhou; Hiroyuki Furukawa; Masatsugu Ishimoto; Nobuki Kawashima

doi:10.1117/12.407372

16 August 2000 Enhancement of momentum coupling efficiency using repetitive pulse ablation

Shigeaki Uchida, Kazuo Imasaki, Xianglin Zhou, Hiroyuki Furukawa, Masatsugu Ishimoto, Nobuki Kawashima

Proceedings Volume 4065, High-Power Laser Ablation III; (2000) https://doi.org/10.1117/12.407372
Event: High-Power Laser Ablation, 2000, Santa Fe, NM, United States

Abstract

Generation of thrust by laser propulsion has gained reality and much attention due to the recent development of high average-power lasers and demonstrations of sizeable object launching. Generating thrust requires a large amount of energy or high average power, but the question is how it is provided. This study deals with effectiveness of highly repetitive ultrashort laser pulses on generating high momentum coupling coefficient, C_m in vacuum condition. Two laser parameters, pulse width and repetition rate, have been studied in terms of the enhancement of C_m. It was found that with pico- and femtosecond pulse ablation, higher C_m is generated compared with longer pulse duration although it is on the same scaling as longer pulse duration. With high repetition rate pulses (80 MHz), more than one order of magnitude enhancements in C_m have been observed compared with single pulse interaction.

Citation Download Citation

Shigeaki Uchida, Kazuo Imasaki, Xianglin Zhou, Hiroyuki Furukawa, Masatsugu Ishimoto, and Nobuki Kawashima "Enhancement of momentum coupling efficiency using repetitive pulse ablation", Proc. SPIE 4065, High-Power Laser Ablation III, (16 August 2000); https://doi.org/10.1117/12.407372

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