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Abstract
Scattering of laser light from free electrons of the plasma has been
performed for the first time in our laboratories.
Coaxial discharge system has been designed to eject plasma into the
vacuum chamber. The coaxial gun has 5 mm diameter inner electrode and
10 mm diameter outer electrode. The discharge current was 300 amperes
at 1 us where Thomson scattering has been performed.
The Q-switched ruby laser parameters has been studied. The
optimum operation conditions obtained of the ruby laser gave a laser
pulses of ~50MW with pulse width of 15 ns.
Measurements of electron temperature and density for the coaxial
discharge plasma has been performed by laser scattering of ruby laser
light.
It was found that the electron temperature is in the range of 1.6 e V and
the electron density in the range of 1.2x1013 cm’ .
The results are supported by spectroscopic measurements which
gave an electron temperture of 4 e V which is in the same order of laser
scattering results. The measured electron temperature of the ejected
plasma from the coaxial discharge is in a good agreement with the
theoretical predictions by others.
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