OBSERVATION OF MAGNETIC-FIELD-ENHANCED EXCITATION AND IONIZATION IN THE PLUME OF KRF-LASER-ABLATED MAGNESIUM

被引：29

作者：

DIRNBERGER, L

DYER, PE

FARRAR, SR

KEY, PH

机构：

[1] Department of Applied Physics, The University of Hull, Hull

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1994年 / 59卷 / 03期

关键词：

D O I：

10.1007/BF00348236

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of a magnetic field on the plume produced by KrF-laser ablation of magnesium in vacuum has been investigated using time-integrated photography, streak photography, spectroscopy and charge probes. Line emission spectra in the almost-equal-to 200-600 nm interval and effective stream velocities for the plume obtained from the spatiotemporal emission from specific neutral and ion lines are reported. Time of flight velocities are also deduced from measurements using simple charge-collector probes. Changes in the plume structure and dynamics, and enhanced emission and ionization are observed in the presence of the field. A qualitative explanation of the results is given in terms of a magnetohydrodynamic model.

引用

页码：311 / 316

页数：6

共 18 条

[1]

Aleksakhin I. S., 1973, Optics and Spectroscopy, V34, P611

[2] LASER-INDUCED FORMATION AND SURFACE PROCESSING OF HIGH-TEMPERATURE SUPERCONDUCTORS [J].