ACCELERATED EXPANSION OF LASER-ABLATED MATERIALS NEAR A SOLID-SURFACE

被引：66

作者：

CHEN, KR ^{[1
]}

LEBOEUF, JN ^{[1
]}

WOOD, RF ^{[1
]}

GEOHEGAN, DB ^{[1
]}

DONATO, JM ^{[1
]}

LIU, CL ^{[1
]}

PURETZKY, AA ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.75.4706

中图分类号：

O4 [物理学];

学科分类号：

0702 [物理学];

摘要：

A dynamic source effect that accelerates the expansion of laser-ablated material in the direction perpendicular to the target is demonstrated. A self-similar theory shows that the maximum expansion velocity is proportional to c(s)/alpha, where 1 - alpha is the slope of the velocity profile and c(s) is the sound speed. Numerical hydrodynamic modeling is in good agreement with the theory. A dynamic partial ionization effect is also studied. With these effects, alpha is reduced and the maximum expansion velocity is significantly increased over that found from conventional models.

引用

页码：4706 / 4709

页数：4

共 24 条

[1]

DYER PE, 1992, LASER ABLATION ELECT

[2]

GOODWIN DG, 1995, 1995 P S EN BEAMS SA

[3]

KAPLAN SA, 1966, INTERSTELLAR GAS DYN, P86

[4]

RECONSIDERING THE MECHANISMS OF LASER SPUTTERING WITH KNUDSEN-LAYER FORMATION TAKEN INTO ACCOUNT [J].