Electron density and temperature measurements in a laser produced carbon plasma
作者:
S. S. Harilal,
C. V. Bindhu,
Riju C. Issac,
V. P. N. Nampoori,
C. P. G. Vallabhan,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 82,
issue 5
页码: 2140-2146
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.366276
出版商: AIP
数据来源: AIP
摘要:
Plasma generated by fundamental radiation from a Nd:YAG laser focused onto a graphite target is studied spectroscopically. Measured line profiles of several ionic species were used to infer electron temperature and density at several sections located in front of the target surface. Line intensities of successive ionization states of carbon were used for electron temperature calculations. Stark broadened profiles of singly ionized species have been utilized for electron density measurements. Electron density as well as electron temperature were studied as functions of laser irradiance and time elapsed after the incidence of laser pulse. The validity of the assumption of local thermodynamic equilibrium is discussed in light of the results obtained. ©1997 American Institute of Physics.
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