| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
|
|
|
|
Influence of Discharge Voltage on Charged Particles in a Multi-Dipole Device in the Presence of an Ion Collecting Surface |
| M. K. Mishra1*, A. Phukan2, M. Chakraborty3 |
1Department of Physics, Baosi Banikanta Kakati College, Nagaon, Barpeta, Assam-781311, India
2Department of Physics, Madhabdev College, Narayanpur, Lakhimpur, Assam-784164, India
3Centre of Plasma Physics-Institute for Plasma Research, Tepesia, Sonapur, Assam-782402, India
|
|
| Cite this article: |
|
M. K. Mishra, A. Phukan, M. Chakraborty 2013 Chin. Phys. Lett. 30 015202 |
|
|
|
|
Abstract The influence of discharge voltage on ion collecting surfaces in the form of a metal plate and a mesh grid is investigated in a multi-dipole device. In the experiment, a solid metal plate and a mesh grid are placed alternately at one end of the multi-dipole device. It is seen that except for high negative bias, the ion space charge layer in front of the grid gets depleted with the increase in discharge voltage whereas it gets thickened in front of the plate. It is also observed that the electron loss at the cusp (anode current) changes accordingly in both the cases. The increase in discharge voltage can enhance the Bohm speed of ions towards the ion collecting surfaces. Further, the negative potential applied to the ion collecting surfaces lowers the bulk plasma potential, which in turn affects the anode current.
|
|
|
Received: 11 September 2012
Published: 04 March 2013
|
|
|
|
|
|
|
|
[1] Leung K N, Collier R D, Marshall L B, Gallaher T N, Ingham W H and Kribel R E 1978 Rev. Sci. Instrum. 49 321
[2] Ehlers K W and Leung K N 1980 Rev. Sci. Instrum. 51 721
[3] Ruscanu D, Anita V and Popa G 2000 Eur. Phys. J. D 10 449
[4] Limpacher R and Mackenzie K R 1973 Rev. Sci. Instrum. 44 726
[5] Leung K L, Samec T and Lamm A 1975 Phys. Lett. A 51 490
[6] Chan C, Intrator T and Hershkowitz N 1982 Phys. Lett. A 91 167
[7] Cho M H, Hershkowitz N, Intrator T 1990 J. Appl. Phys. 67 3254
[8] Knorr G, Merlino R L 1984 Plasma Phys. Contr. Fusion 26 433
[9] Hershkowitz N, Smith J R and DeKock J R 1979 Plasma Phys. 21 823
[10] Merlino R L 2007 Am. J. Phys. 75 1078
[11] Bohm D 1949 The Characteristics of Electrical Discharge in Magnetic Fields (New York: McGraw-Hill)
[12] Ikezi H, Taylor R Y and Baker D R 1970 Phys. Rev. Lett. 25 11
[13] Taylor R Y, MacKenzie K R and Ikezi H 1972 Rev. Sci. Instrum. 43 1679
[14] Leung N, Hershkowitz N and MacKenzie K R 1976 Phys. Fluids 19 1045
[15] Phukan A, Mishra M K and Chakraborty M 2007 J. Phys. D: Appl. Phys. 40 3616
[16] Mishra M K, Phukan A, Chakraborty M and Goswami K S 2007 Phys. Lett. A 365 135
[17] Mishra M K and Phukan A 2008 Chin. Phys. Lett. 25 1011 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
