Numerical Investigation of the Non-Uniformity of the Electric Field Distribution by Injection of Net Electron Charge in TE CO2 Laser

Morshedian, Nader; Aram, Majid; Mehramiz, Ahmad; Jahanian, Nahid

doi:10.22061/jecei.2017.626

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Numerical Investigation of the Non-Uniformity of the Electric Field Distribution by Injection of Net Electron Charge in TE CO2 Laser

Article 6, Volume 5, Issue 1 - Serial Number 9, Spring 2017, Page 25-29 PDF (583 K)

Document Type: Research Paper

DOI: 10.22061/jecei.2017.626

Authors

Nader Morshedian^* ¹; Majid Aram²; Ahmad Mehramiz³; Nahid Jahanian³

¹Plasma and Fusion Research School, NSTRI, North Kargar Ave, Tehran, P.O. Box: 14399-51113, IRAN

²Photonics & Quantum Technologies Research School, NSTRI, North Kargar Ave., Tehran, P.O.Box: 14155-1339, IRAN

³Department of Physics, Faculty of Science, Imam Khomeini International University, Qazvin, IRAN

Abstract

In this report, the distribution and deviation of electric field in the active medium of the TE CO₂ laser has been investigated due to the injection of net electron charge beam as a plasma generator. Some parameters of system have been considered, such as density and mean-free-path of injected charge beam. The electric potential and electric field distribution have been simulated by solving the Poison’s equation using the method of successive over relaxation (SOR) numerical method. The electrode potential and the number of injected charged particles are respectively considered to be +75 kV and 10⁸ mm^-3. In these conditions, the maximum energy of the electrons beam would be at the order of 1-2 eV. Deviation of the electric field with different mean-free-path of electrons beam with Gaussian density distribution has been numerically calculated. It has been concluded that if the net charge density is increased then the field deviation would grow. Moreover, if the mean-free-path of the electrons is decreased, subsequently, the electric field deviation is increased.

Graphical Abstract

Numerical Investigation of the Non-Uniformity of the Electric Field Distribution by Injection of Net Electron Charge in TE CO2 Laser

Keywords

Carbon dioxide laser pulse; Transversal discharge; Numerical simulation of electric field; Pre-ionization; SOR; Charge injection

References

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[4] E. Aghayari , F. Sade, and M. Aram, “Investigation of the electrods cross sections for the TEA CO2 laser” in Proc. 3th engineering conf.(KAM), Iran, 2015.

[5] http://liberica.org

[6] J.R. Nagel, “Solving the generalized poisson equation using the finite-difference method (FDM),” University of Utah, 2012.

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