నైరూప్య

Generation of Pulsed Fe Plasma and Study of Its Physical Parameters

Naseer M. Hadi, Sabah H. Sabeeh and Mustafa M. R. Sabhan

In the present work, a pulsed Fe plasma generation by Q-switched Nd: YAG laser. The energy per pulse at the target surface was fixed at a level of (475 mJ, 6 ns), focused on Fe solid target at atmospheric pressure and vacuum pressure (1×10-1 mbar).The plasma temperature was measured from Boltzmann plot using six Fe I spectral lines at the wavelengths (501.2, 534.1, 556.9, 576.2, 602.4 and 623.07) nm. The electron density was measured by means of Stark broadening formula (FWHM) for spectral lines Fe I at line transition 576.2 nm and for Fe I at line transition 556.9 nm as the reference electron density, at atmospheric pressure and vacuum pressure. The density was 8.2x1018 cm-3 and electron temperature 1.466 eV at atmospheric pressure, the electron density was 9x1018 cm-3 and the electron temperature 1.711 eV at pressure (1×10-1) mbar. Measurements were done based on theory of local thermodynamic equilibrium (LTE) in the range (500-650 nm) of emitted spectrum