Thermophysical and gas-dynamic characteristics of laser-induced gasplasma flows under femtosecond laser ablation of titanium in vacuum

Loktionov, E. Yu.; Protasov, Yu. S.

doi:10.1070/qe2014v044n03abeh015054

Cited by 8 publications

(1 citation statement)

References 70 publications

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“…6 In Fig. 2, literature references for the data listed are as follows: a, b, c, d: aluminum, copper, graphite, and lead; 7 e: aluminum; 8 g, h, O, P: aluminum; 9 i, k, l, m: tantalum, titanium, PMMA, and aluminum, w, x, A: aluminum, kevlar epoxy, and nylon, B, C: cellulose acetate; 10 n: aluminum; 11 o: aluminum, y: kevlar epoxy, and T, U: aluminum; 12 p, q, r, s, t, u: beryllium, graphite, aluminum, zinc, silver, and tungsten; 13 z: copper; 14 G: titanium; 15 H: aluminum and E, F: carbon phenolic and graphite; 16 I, J, K, L, M: titanium and grafoil; 17 Q: aluminum; 18 R: stainless steel; 19 S: aluminum; 20 Z, f: copper; 21 N: Al; 22 1: Ti; 23 2: Mo; 24 3: W, 4: Au; 5: Li; 6: Fe and 7: glycidyl azide polymer; 25 v:Al (simulation); 26 V,W,X,Y: Al, 27 (all simulations, circular polarization, H inc ¼ 0 , 45 , 60 , and 75 , respectively).…”

Section: B Brief History Of Laser Ablationmentioning

confidence: 99%

Laser impulse coupling measurements at 400 fs and 80 ps using the LULI facility at 1057 nm wavelength

Phipps

Boustie

Chevalier

et al. 2017

Journal of Applied Physics

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International audienceAt the École Polytechnique « LULI » facility, we have measured the impulse coupling coefficient Cm (target momentum per joule of incident laser light) with several target materials in vacuum, at 1057 nm and 400 fs and 80 ps pulse duration. A total of 64 laser shots were completed in a two-week experimental campaign, divided between the two pulse durations and among the materials. Our main purpose was to resolve wide discrepancies among reported values for Cm in the 100 ps region, where many applications exist. A secondary purpose was to compare Cm at 400 fs and 80 ps pulse duration. The 80 ps pulse was obtained by partial compression. Materials were Al, Ta, W, Au, and POM (polyoxymethylene, trade name Delrin). One application of these results is to pulsed laser ablation propulsion in space, including space debris re-entry, where narrow ranges in Cm and specific impulse Isp spell the difference between dramatic and uneconomical performance. We had difficulty measuring mass loss from single shots. Imparted momentum in single laser shots was determined using pendulum deflection and photonic Doppler velocimetry. Cm was smaller at the 400 fs pulse duration than at 80 ps. To our surprise, Cm for Al at 80 ps was at most 30 N/MW with 30 kJ/m2 incident fluence. On the other extreme, polyoxymethylene (POM, trade name Delrin) demonstrated 770 N/MW under these conditions. Together, these results offer the possibility of designing a Cm value suited to an application, by mixing the materials appropriately

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