@article{Karim_Mayi_Al-Hakary_2019, title={Measurement of Some Argon Plasma Parameters Glow Discharge Under Axial Magnetic Field}, volume={7}, url={https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/628}, DOI={10.25271/sjuoz.2019.7.4.628}, abstractNote={<p class="Abstracttext"><span lang="EN-GB">This paper investigates the </span><span lang="EN-GB">characteristics some of argon plasma parameters</span><span lang="EN-GB"> of glow discharge under </span><span lang="EN-GB">axial magnetic field</span><span lang="EN-GB">. The </span><span lang="EN-GB">DC power supply of range (0-6000) V is used as a breakdown voltage to obtain the discharge of argon gas. </span><span lang="EN-GB">The discharge voltage-current (V-I) characteristic curves and Paschen’s curves </span><span lang="EN-GB">as well as the electrical conductivity </span><span lang="EN-GB">were studied with the presents of magnetic field confinement at different gas pressures. </span><span lang="EN-GB">The magnetic field up to 25 mT was obtained using four coils of radius 6 cm and 320 turn by passing A.C current up to 5 Amperes.</span><span lang="EN-GB"> Spectroscopic measurements are employed for purpose of estimating two main plasma parameters electron temperature (T<sub>e</sub>) and electron density (n<sub>e</sub>)</span><span lang="EN-GB">.</span><span lang="EN-GB"> Emission spectra from positive column (PC) zone of the discharge have been studies at different</span><span lang="EN-GB"> values of magnetic field</span><span lang="EN-GB"> and pressures at constant discharge currents of 1.5 mA. Electron temperature (T<sub>e</sub>) and its density are calculated from the ratio of the intensity of two emission lines of the same lower energy levels. Experimental results show</span> <span lang="EN-GB">the abnormal glow region</span><span lang="EN-GB"> characteristics</span><span lang="EN-GB"> (positive resistance</span><span lang="EN-GB">)</span><span lang="EN-GB">. Breakdown voltage versus pressure curves near the curves of paschen and decrease as magnetic field increases due to magnetic field confinement of plasma charged particles.</span><span lang="EN-GB"> Also the </span><span lang="EN-GB">electrical conductivity increases due to enhancing magnetic field at different gas pressures</span><span lang="EN-GB">. Both temperature density of electron and the intensities of two selected emission lines decrease with increasing pressure due decreasing of mean free path of electron. Electron density increase according to enhancing magnetic field, while the intensity of emitting lines tends to decrease.</span></p>}, number={4}, journal={Science Journal of University of Zakho}, author={Karim, Pshtiwan M.A. and Mayi, Diyar S. and Al-Hakary, Shamo Kh.}, year={2019}, month={Dec.}, pages={158–166} }