TIME-RESOLVED RESONANT ABSORPTION STUDY OF 532-NM LASER-GENERATED PLUMES OVER YBA2CU3O7 TARGETS

被引：38

作者：

CHEUNG, NH ^{[1
]}

YING, QY ^{[1
]}

ZHENG, JP ^{[1
]}

KWOK, HS ^{[1
]}

机构：

[1] SUNY BUFFALO,INST SUPERCONDUCT,BUFFALO,NY 14260

来源：

JOURNAL OF APPLIED PHYSICS | 1991年 / 69卷 / 09期

关键词：

D O I：

10.1063/1.348835

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The number densities n(t) of the atomic species produced by pulsed-laser (532-nm) interaction with YBaCuO targets were measured using time-resolved resonant absorption spectroscopy. At approximately 5 J/cm2 fluence and 0.8 mm above the target, the peak n(t) ranged from 10(13) to 10(15) cm-3. The distributions of the normal z-velocity component could be modeled by Gaussian functions, in agreement with the theory of supersonic nozzle beams and the more recent theory of Knudsen layer formation. Such theoretical fits gave most probable z velocities in the km/s range and Mach numbers as high as 7. Ba-ion z velocities were better fitted by a 4:7 mix of fast (approximately 3-km/s) and slow (approximately 2-km/s) components.

引用

页码：6349 / 6354

页数：6

共 27 条

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