Critical Fluences And Modeling Of CO{sub 2} Laser Ablation Of Polyoxymethylene From Vaporization To The Plasma Regime

Journal Article · Thu May 06 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3435456· OSTI ID:21367306

Sinko, John E ^[1]; Phipps, Claude R ^[2]; Tsukiyama, Yosuke ^[1]; Ogita, Naoya; Sasoh, Akihiro ^[3]; Umehara, Noritsugu ^[4]; Gregory, Don A ^[5]

---

1. Micro-Nano Global Center of Excellence, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan 464-8603 (Japan)
2. Photonic Associates, LLC, Santa Fe, NM, 87505 (United States)
3. Department of Aerospace Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan 464-8603 (Japan)
4. Department of Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan 464-8603 (Japan)
5. Department of Physics, University of Alabama in Huntsville, OB-201B John Wright Dr., Huntsville, AL 35899 (United States)

A CO{sub 2} laser was operated at pulse energies up to 10 J to ablate polyoxymethylene targets in air and vacuum conditions. Critical effects predicted by ablation models are discussed in relation to the experimental data, including specifically the threshold fluences for vaporization and critical plasma formation, and the fluence at which the optimal momentum coupling coefficient is found. Finally, we discuss a new approach for modeling polymers at long wavelengths, including a connection formula that links the vaporization and plasma regimes for laser ablation propulsion.

• OSTI ID: 21367306
• Journal Information: AIP Conference Proceedings, Vol. 1230, Issue 1; Conference: 6. international symposium on beamed energy propulsion, Scottsdale, AZ (United States), 1-5 Nov 2009; Other Information: DOI: 10.1063/1.3435456; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
ABSORPTION
AIR
CARBON DIOXIDE LASERS
COUPLING
DIFFUSION
EVAPORATION
LASER RADIATION
LASER-PRODUCED PLASMA
POLYOXYMETHYLENES
PROPULSION
PROPULSION SYSTEMS
PULSES
ELECTROMAGNETIC RADIATION
FLUIDS
GAS LASERS
GASES
LASERS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHASE TRANSFORMATIONS
PLASMA
POLYACETALS
POLYMERS
RADIATIONS
SORPTION