Critical fluence effects in laser propulsion

John E. Sinko; Don A. Gregory

doi:10.1117/12.782469

12 May 2008 Critical fluence effects in laser propulsion

John E. Sinko, Don A. Gregory

Proceedings Volume 7005, High-Power Laser Ablation VII; 70051Z (2008) https://doi.org/10.1117/12.782469
Event: High-Power Laser Ablation 2008, 2008, Taos, New Mexico, United States

Abstract

The fluence dependence of the laser ablation of selected polymers was studied within the range from 1-150 J/cm². A TEA CO₂ laser operating at 10.6 μm with 300 ns main pulse length and up to 20 J pulse energy was used to ablate prepared polymer samples with single pulses of laser energy. Measurements of parameters such as the ablated mass per spot area (Δm_a), momentum coupling coefficient (C_m), specific impulse (I_sp), and internal efficiency (η_i) will be plotted as functions of fluence. Critical threshold effects observed throughout the experiments will be described in detail.

Citation Download Citation

John E. Sinko and Don A. Gregory "Critical fluence effects in laser propulsion", Proc. SPIE 7005, High-Power Laser Ablation VII, 70051Z (12 May 2008); https://doi.org/10.1117/12.782469

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