Experimental investigation of recoil-momentum-generation efficiency under near-IR femtosecond laser ablation of refractory metals in vacuum

被引：8

作者：

Loktionov, E. Yu. ^{[1
]}

Protasov, Yu. S. ^{[1
]}

Protasov, Yu. Yu. ^{[1
]}

机构：

[1] Bauman Moscow State Tech Univ, Moscow 105005, Russia

来源：

OPTICS AND SPECTROSCOPY | 2013年 / 115卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

OPTOMECHANICAL CHARACTERISTICS; ENERGY EFFICIENCY; CONDENSED MEDIA; PURE METALS; PLASMA; TI; SINGLE; PULSES; TARGETS; KRF;

D O I：

10.1134/S0030400X13110143

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The use of ultrashort laser pulses is a way to increase recoil momentum under laser ablation of materials, because, in this case, the energy deposition per unit volume of the target material is substantially higher due to reduced heat dissipation. By using methods of combined interferometry, we estimated the specific impulse (200-900 s), momentum coupling coefficient (2 x 10(-5)-3 x 10(-4) Ns/J), laser-energy conversion efficiency to kinetic energy of the gas-plasma flow (0.05-0.82), and degree of the gas-plasma flow monochromaticity (0.72-0.92) under femtosecond (tau 45 fs, lambda 800 nm) ablation of refractory metals (Ti, Zr, Mo, and Nb) in vacuum.

引用

页码：758 / 763

页数：6

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