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Proceedings Paper

Wall-ablative laser-driven in-tube accelerator
Author(s): Akihiro Sasoh; Shingo Suzuki; Atsushi Matsuda
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Paper Abstract

The laser-driven in-tube accelerator in which the propellant is supplied from laser-ablated gas from the tube wall was developed. Proof-of concept demonstrations of vertical launch were successfully done. The device had a 25mm X 25mm square cross-section; two opposing walls were made of polyacetal and acted as the propellant, the other two acrylic window with guide grooves to the projectile. The upper end of the launch tube was connected to a vacuum chamber of an inner volume of 0.8 m2, in which the initial pressure was set to lower than 20 Pa. With plugging the bottom end of the launch tube, a momentum coupling coefficient exceeding 2.5 mN/W was obtained. Even with the bottom end connected to the same vacuum chamber through a different duct, the projectile was vertical launched successfully, obtaining 0.14 mN/W.

Paper Details

Date Published: 15 May 2008
PDF: 8 pages
Proc. SPIE 7005, High-Power Laser Ablation VII, 70050Z (15 May 2008); doi: 10.1117/12.786500
Show Author Affiliations
Akihiro Sasoh, Nagoya Univ. (Japan)
Shingo Suzuki, Nagoya Univ. (Japan)
Atsushi Matsuda, Nagoya Univ. (Japan)

Published in SPIE Proceedings Vol. 7005:
High-Power Laser Ablation VII
Claude R. Phipps, Editor(s)

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