Plasma Temperatures Generated by Focused Laser Giant Pulses
作者:
David W. Gregg,
Scott J. Thomas,
期刊:
Journal of Applied Physics
(AIP Available online 1967)
卷期:
Volume 38,
issue 4
页码: 1729-1731
ISSN:0021-8979
年代: 1967
DOI:10.1063/1.1709750
出版商: AIP
数据来源: AIP
摘要:
Plasma temperatures generated by focusing ruby‐laser giant pulses on surfaces of Be, Al, and Pb in a vacuum were measured as a function of time and giant‐pulse intensity. The monochromatic emission intensities of the plasmas (relative to those obtained with a standard source) were measured at wavelengths ranging from 4000 to 10 500 Å, and the temperatures were then calculated from the Planck function. It was found that the plasma temperatures achieved with the lighter elements were hotter and had greater rates of increase with laser intensity. However, the rates of increase were proportional to only the 0.5 power of the laser intensity or less, and the difference in temperatures between target materials was not very great. Temperatures as high as 8×105°K were achieved with beryllium.
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