Influence of Axial Magnetic Field on the Electrical Breakdown and Secondary Electron Emission in Plane-Parallel Plasma Discharge

Authors: Sabah I. Wais, Raghad Y. Mohammed, Sedki O. Yousif

Abstract:

The influence of axial magnetic field (B=0.48 T) on the variation of ionization efficiency coefficient h and secondary electron emission coefficient g with respect to reduced electric field E/P is studied at a new range of plane-parallel electrode spacing (0< d< 20 cm) and different nitrogen working pressure between 0.5-20 Pa. The axial magnetic field is produced from an inductive copper coil of radius 5.6 cm. The experimental data of breakdown voltage is adopted to estimate the mean Paschen curves at different working features. The secondary electron emission coefficient is calculated from the mean Paschen curve and used to determine the minimum breakdown voltage. A reduction of discharge voltage of about 25% is investigated by the applied of axial magnetic field. At high interelectrode spacing, the effect of axial magnetic field becomes more significant for the obtained values of h but it was less for the values of g.

Keywords: Paschen curve, Townsend coefficient, Secondaryelectron emission, Magnetic field, Minimum breakdown voltage.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333588

References:

[1] D. Sriram and K. K. Jaina, "Effect of magnetic field on breakdown voltage characteristics of a multigap pseudospark", Appl. Phys. Lett. 70(23), 3093-3095, 1997.
[2] G. Petraconi, H. S. Maciel, R. S. Pessoa, G. Murakami, M. Massi, C. Otani, W. M. I. Uruchi, and B.N. Sismanoglu, "Longitudinal Magnetic Field Effect on the Electrical Breakdown in Low Pressure Gases", Brazilian J. Phys. 34(4), 1662-1666, 2004.
[3] I. H. Tan, A. Ueda, R. S. Dallaqua, R. M. Oliverira and J. O. Rossi, "Magnetic field effects on secondary electron emission during ion implantation in a nitrogen plasma", J. Appl. Phys. 100(033303), 1-5, 2006.
[4] M. Ohki and S. Saito, "Effect of magnetic field on low-pressure gaseous breakdown along the surface of a solid insulator", IEE Proceedings-A 138(6), 300-312, 1991.
[5] H. S. Uhm E. H. Choi and G. S. Cho, "Influence of secondary electron emission on breakdown voltage in plasma display panel", Appl. Phys. Lett. 78(5), 592-594, 2001.
[6] G. Auday, Ph. Guillot, J. Galy and H. Brunet, "Experimental study of the effective secondary emission coefficient for rare gases and copper electrodes", J. Appl. Phys. 83(11), 5917-5921, 1998.
[7] K. Burm, "Breakdown magnetic field in an inductively coupled plasma", Phys. Lett. A 372, 6280-6283, 2008.
[8] J. Cobine, "Gaseous conductors", Dover, New York, 1958.
[9] G. Auday, Ph. Guillot and J. Galy, "secondary emission of dielectrics used in plasma display panel", J. Appl. Phys. 88(8), 4871-4874, 2000.
[10] H. S. Uhm, "Minimum breakdown voltage in cylindrical diode", J. Korean Physical Society 38(4), L295-L298, 2001.