Experimental study on the effect of longitudinal magnetic field on Townsend discharge characteristics in low pressure argon gas

Mohammed, Sabri J.; Khalaf, Mohammed K.; Majeed, Muataz A.; Jasem, Hanaa E.

International Journal of Advanced and Applied Sciences

Int. j. adv. appl. sci.

EISSN: 2313-3724

Print ISSN: 2313-626X

Volume 4, Issue 2 (February 2017), Pages: 91-95

Title: Experimental study on the effect of longitudinal magnetic field on Townsend discharge characteristics in low pressure argon gas

Author(s): Sabri J. Mohammed ¹, Mohammed K. Khalaf ², Muataz A. Majeed ^{1, 3,} *, Hanaa E. Jasem ¹

Affiliation(s):

¹Department of Physics, Faculty of Education for Pure Sciences, Tikrit University, Tikrit, Iraq
²Ministry of Science and Technology, Baghdad, Iraq
³Ministry of Education, Baghdad, Iraq

https://doi.org/10.21833/ijaas.2017.02.016

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Abstract:

In this paper the electrical breakdown has been described for low-pressure argon discharges under the influence of an external longitudinal magnetic field. Plane-parallel stainless steel electrodes (7.25 cm diameter) are sustained with a dc voltage (0<V<1 kV), the pressure was varied between 0.4 mbar and 2.6 mbar and the inter-electrode distance 2.0 cm. A Helmholtz coil was used to produce a uniform magnetic field (B=270G) from an inductive copper coil of diameter (1mm). A Paschen curve has been obtained and the first Townsend ionization coefficient (α), the secondary electron emission coefficient (γ) and the ionization efficiency (η) were plotted with respect to the variation of the reduced field (E/P). The calculated value of the η (E/p) and γ (E/p) inside the magnetic trap is in good agreement with the previous literatures results.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords: External longitudinal magnetic field, Paschen curves, Minimum breakdown voltage, Townsend coefficient, Ionization efficiency

Article History: Received 16 September 2016, Received in revised form 31 January 2017, Accepted 1 February 2017

Digital Object Identifier:

https://doi.org/10.21833/ijaas.2017.02.016

Citation:

Mohammed SJ, Khalaf MK, Majeed MA, Jasem HE (2017). Experimental study on the effect of longitudinal magnetic field on Townsend discharge characteristics in low pressure argon gas. International Journal of Advanced and Applied Sciences, 4(2): 91-95

http://www.science-gate.com/IJAAS/V4I2/Mohammed.html

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