Cathode Drop of an Arc

1941 ◽  
Vol 12 (5) ◽  
pp. 436-438 ◽  
Author(s):  
G. H. Fett
Keyword(s):  
Cathode Drop

Unified Analysis of the Metal Vapour Arc

1973 ◽  
Vol 28 (3-4) ◽  
pp. 417-428 ◽  
Author(s):  
G. Ecker
Keyword(s):  
Space Charge ◽  
Electron Temperature ◽  
Current Density ◽  
Space Charge Region ◽  
Decisive Role ◽  
Emission Current Density ◽  
Mean Free Path ◽  
Vacuum Arc ◽  
Metal Vapour ◽  
Cathode Drop

Abstractfor given values of the total current density j and the cathode spot surface temperature T a unified and consistent calculation of the cathode drop, Uc , the electron temperature in the ionization region T _- the electron emission current density je , the ion current density j+ , and the extension of the space charge region lsp are presented.We find that the counter diffusion of plasma electrons into the space charge region plays a decisive role. It causes an effective space charge region extension lsp of a few plasma electron Debey lengths which in general is much less than the ion mean-free-path commonly used. Without the effect of the counter diffusing electrons, the theoretical results deviate from the experimental data by orders of magnitude.For the example of a Cu metal vapour-or vacuum arc the cathode drop is found to be approximately Uc = 15 [V], the electron temperature about T- =25000 [°K] and the ratio j+/j= 0.5.Since the analysis allows for multiple ionization the presence of multiply charged ions in the spot area can be calculated.The results of this investigation justify within the E-areas the approximations used in the analysis for the copper arc in an earlier investigation 1. Outside these E-areas a recalculation with the new results derived here may cause markable changes.

scholarly journals Cathode drop in arcs and glow discharges

1931 ◽  
Vol 50 (9) ◽  
pp. 755-755
Author(s):  
S. S. Mackeown
Keyword(s):  
Glow Discharges ◽  
Cathode Drop

scholarly journals The Cathode Drop in an Electric Arc

1929 ◽  
Vol 34 (4) ◽  
pp. 611-614 ◽  
Author(s):  
S. S. Mackeown
Keyword(s):  
Electric Arc ◽  
Cathode Drop

scholarly journals Cathode drop in arc discharges

1932 ◽  
Vol 51 (6) ◽  
pp. 386-388 ◽  
Author(s):  
S. S. Mackeown
Keyword(s):  
Cathode Drop ◽  
Arc Discharges
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