Interferometric diagnostic of picosecond laser ablation in air

被引：6

作者：

Vogel, N ^{[1
]}

Kochan, N ^{[1
]}

机构：

[1] Univ Technol Chemnitz, Dept Phys Opt Spect & Mol Phys, D-09107 Chemnitz, Germany

来源：

APPLIED SURFACE SCIENCE | 1998年 / 127卷

关键词：

interferometry; laser ablation; absorption photography; microchanneling;

D O I：

10.1016/S0169-4332(97)00768-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Investigations of a spatial density distribution at the focus of an intense picosecond Nd:YAG loser-pulse (lambda = 1064 nm) near a metallic target in air have been performed by interferometry and absorption photography with high temporal and spatial resolution (50 ps, < 1 mu m). An effect of microchanneling and an intense shock-wave formation in laser-produced plasma were observed. Estimations show that the current density in the microchannel is of the order of 10(10) A/cm(2), followed by the generation of a self-magnetic field in the narrow channel having a magnitude of 7 MG. When the power density of laser radiation was reduced to a value of the order of 9 X 10(9) W/cm(2) a significant change in electron density distribution has been estimated: a shock wave with a strong boundary front vanished, an electron density failed under the value of the order of 10(18) cm(-3). (C) 1998 Elsevier Science B.V.

引用

页码：928 / 934

页数：7

共 12 条

[1] DYNAMICS AND STABILITY OF AN EXPANDING LASER-INDUCED PLASMA IN A LOW-DENSITY GAS [J].

BARANOV, VY ;

DERKACH, ON ;

GRISHINA, VG ;

KANEVSKII, MF ;

SEBRANT, AY .

PHYSICAL REVIEW E, 1993, 48 (02) :1324-1330

[2] CORRELATION OF SPECTRAL EMISSION INTENSITY IN THE INDUCTIVELY-COUPLED PLASMA AND LASER-INDUCED PLASMA DURING LASER-ABLATION OF SOLID SAMPLES [J].

FERNANDEZ, A ;

MAO, XL ;

CHAN, WT ;

SHANNON, MA ;

RUSSO, RE .

ANALYTICAL CHEMISTRY, 1995, 67 (14) :2444-2450

[3] IMAGING AND BLACKBODY EMISSION-SPECTRA OF PARTICULATES GENERATED IN THE KRF-LASER ABLATION OF BN AND YBA2CU3O7-X [J].

GEOHEGAN, DB .

APPLIED PHYSICS LETTERS, 1993, 62 (13) :1463-1465

[4] FAST INTENSIFIED-CCD PHOTOGRAPHY OF YBA2CU3O7-X LASER ABLATION IN VACUUM AND AMBIENT OXYGEN [J].

GEOHEGAN, DB .

APPLIED PHYSICS LETTERS, 1992, 60 (22) :2732-2734

[5] TIME-RESOLVED EMISSION CHARACTERISTICS AND TEMPERATURE PROFILES OF LASER-INDUCED PLASMAS IN HELIUM [J].

JOSEPH, MR ;

XU, N ;

MAJIDI, V .

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1994, 49 (01) :89-103

[6] XECL EXCIMER LASER-INDUCED SHOCK-WAVE PLASMA AND ITS APPLICATION TO EMISSION SPECTROCHEMICAL ANALYSIS [J].

KAGAWA, K ;

KAWAI, K ;

TANI, M ;

KOBAYASHI, T .

APPLIED SPECTROSCOPY, 1994, 48 (02) :198-205

[7]

MAO X, 1997, APPL PHYS A

[8] Preferential vaporization and plasma shielding during nano-second laser ablation [J].

Mao, XL ;

Chan, WT ;

Caetano, M ;

Shannon, MA ;

Russo, RE .

APPLIED SURFACE SCIENCE, 1996, 96-8 :126-130

[9] EXPERIMENTAL AND THEORETICAL STUDIES OF AIR BREAKDOWN BY INTENSE PULSE OF LIGHT [J].

NELSON, P ;

VEYRIE, P ;

BERRY, M ;

DURAND, Y .

PHYSICS LETTERS, 1964, 13 (03) :226-228

[10] LASER-ABLATION SAMPLING WITH INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY FOR THE ANALYSIS OF PROTOTYPICAL GLASSES [J].

RUSSO, RE ;

MAO, XL ;

CHAN, WT ;

BRYANT, MF ;

KINARD, WF .

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1995, 10 (04) :295-301

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