Bulletin of ANPA
Abstract submitted to ANPA Conference July 14–16, 2023
Volume 5, Number 1
Atomic, Molecular, Optical and Plasma Physics
Abstract ID: ANPA2023-N00020
Abstract:
ANPA2023-N00020: EFFECT OF ELECTRON IMPACT IONIZATION SOURCE TERM ON MAGNETIZED PLASMA SHEATH
Authors:
- Pradeep Karki; Tribhuvan University
- Suresh Basnet; Tribhuvan university
- Raju Khanal; Tribhuvan Unniversity
EFFECT OF ELECTRON IMPACT IONIZATION SOURCE TERM ON MAGNETIZED PLASMA SHEATH Pradeep Karki1*, Suresh Basnet1,2, and Raju Khanal2 1Department of Physics, GoldenGate International College, Tribhuvan University, Kathmandu 44600, Nepal 2Central Department of Physics, Tribhuvan University, Kirtipur, Kathmandu 44613, Nepal Email: stonermind12@gmail.com In this study, a fluid model has been used to explore the magnetized plasma sheath properties in the presence of ion-neutral collision and electron impact ionization source term. To solve the set of fluid equations, the initial conditions at the sheath edge and physical parameters are used. The obtained results reveal that the ionization source term affects the plasma sheath parameters: electric potential, net charge density, electron and ion density, and ion velocity. In terms of magnitude, the potential increases from about 17 to 68 as the magnitude of electron impact ionization frequency increases from 0 to 0.02. The net charge density is minimum at the sheath edge, and it increases towards the wall with its maximum peak value obtained in the sheath region. Once the maximum occurs, the net charge density decreases towards the wall. For the same increment of electron impact ionization frequency, the particle density decreases towards the wall, however, the decreasing rate is much slower for the ions than that of electrons. The electron density almost diminished at the wall while few ion densities reach the wall. Moreover, the velocity of ions increases toward the wall and the magnitude velocity with which it strikes the wall increases from about 5.7 to 11.6. References: [1] T. E. Sheridan and J. A. Goree, IEEE Trans. Plasma Sci. 17, 884 (1989). [2] K. U. Riemann, J. Phys. D: Appl. Phys. 24(4), 493 (1991). [3] N. Sternberg, V. Godyak, and D. Hoffman, Phys. Plasmas 13, 063511 (2006). [4] S. Basnet, A. Maskey, A. Deuja, and R. Khanal, Phys. Plasmas 28, 083705 (2021).
To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N00020