Effect of Discharge Plasma Potential on Diffusion Plasma Parameters Controlled by a Mesh Grid in a Double Plasma Device

2013 ◽  
Vol 53 (3) ◽  
pp. 206-213 ◽  
Author(s):  
M. K. Mishra ◽  
A. Phukan ◽  
M. Chakraborty

2013 ◽  
Vol 79 (5) ◽  
pp. 913-920
Author(s):  
M. K. MISHRA ◽  
A. PHUKAN ◽  
M. CHAKRABORTY

AbstractThe effect of discharge voltage on bi-Maxwellian electrons in the diffusion region of a double plasma device has been studied. The increase in discharge voltage enhances the flux of ionizing electrons to the diffusion region separated by a mesh grid. This energetic electron flux in turn affects other important parameters such as density, electron temperature, plasma potential and floating potential in the diffusion region. Furthermore, the dependence of density and temperature of both ionizing and plasma electrons on discharge voltage is investigated. The electron energy probability function obtained from probe data also indicates the bi-Maxwellian nature of electrons.







2007 ◽  
Vol 365 (1-2) ◽  
pp. 135-139 ◽  
Author(s):  
M.K. Mishra ◽  
A. Phukan ◽  
M. Chakraborty ◽  
K.S. Goswami


2007 ◽  
Vol 40 (12) ◽  
pp. 3616-3619 ◽  
Author(s):  
Arindam Phukan ◽  
Mrinal Kr Mishra ◽  
Monojit Chakraborty




Pramana ◽  
2010 ◽  
Vol 74 (3) ◽  
pp. 399-409 ◽  
Author(s):  
A. Phukan ◽  
M. K. Mishra ◽  
B. K. Saikia ◽  
M. Chakraborty


1989 ◽  
Vol 41 (2) ◽  
pp. 243-255 ◽  
Author(s):  
Y. Nakamura ◽  
Joyanti Chutia

Reflection of ion-acoustic waves from the ion sheath in front of the separation grid in a double-plasma device has been investigated experimentally. The plasma potential φ of the source plasma was controlled relative to that of the target plasma. When eφ < κΤe, where Τe is the electron temperature, no reflection was observed. The reason for this is that ions are drifting towards the grid with the Bohm velocity, i.e. the ion-acoustic velocity. When eφ > κΤe the reflected wave consists of the ion-acoustic wave and the ion beam mode. The reflection coefficient for the ion-acoustic wave is about unity. This high efficiency is due to reflection of the ions themselves.



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