Characteristics of Field Emission at Very High Current Densities

2007 ◽  
pp. 19-30
Keyword(s):  
Field Emission ◽  
High Current ◽  
Current Densities ◽  
Very High

Cathodic Evolution of Hydrogen at Very High Current Densities

Nature ◽  
1950 ◽  
Vol 165 (4193) ◽  
pp. 403-404 ◽  
Author(s):  
A. M. AZZAM ◽  
J. O'M. BOCKRIS
Keyword(s):  
High Current ◽  
Current Densities ◽  
Very High

P-N junction in very degenerate semiconductor at very high current densities

1965 ◽  
Vol 3 (8) ◽  
pp. lxx-lxxi
Author(s):  
A.I. Imenkov ◽  
M.M. Koslov ◽  
D.N. Nasledov ◽  
B.V. Tsarenkov
Keyword(s):  
High Current ◽  
Degenerate Semiconductor ◽  
Current Densities ◽  
Very High

scholarly journals On the critical current for the charge density wave transport

2002 ◽  
Vol 12 (9) ◽  
pp. 127-128
Author(s):  
A. A. Sinchenko ◽  
S. G. Zybtsev ◽  
I. G. Gorlova ◽  
Yu. I. Latyshev ◽  
V. Ya. Pokrovskii ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Metallic State ◽  
High Current ◽  
Point Contacts ◽  
One Dimensional ◽  
Wave Transport ◽  
Current Densities ◽  
Very High

We report transport measurements under very high current densities j, up to 108 A/cm2, of quasi-one-dimensional charge-density wave (CDW) conductors NbSe3 and TaS3. Above $j_0-10^1$ A/cm2 the point contacts NbSe3-NbSe3 show a sharp singularity, and the TaS3 nanosamples show metallic temperature dependence (positive dR/dn. We interpret both results as an evidence for the suppression of the Peierls gap 2A and development of the metallic state above j0. Possible scenarios of the Peierls state destruction are discussed.

NEEDLE CATHODES FOR HIGH-BRIGHTNESS BEAMS

2007 ◽  
Vol 22 (22) ◽  
pp. 3784-3793 ◽  
Author(s):  
C. H. BOULWARE ◽  
J. D. JARVIS ◽  
H. L. ANDREWS ◽  
C. A. BRAU
Keyword(s):  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
Thermionic Emission ◽  
High Current ◽  
High Brightness ◽  
Electron Sources ◽  
Schottky Effect ◽  
Surface Electric Field ◽  
Very High

At the tips of sharp needles, the surface electric field is enhanced by many orders of magnitude. This intensifies thermionic emission and photoemission of electrons through the Schottky effect, and reduces the effect of space charge. The increased current density improves the brightness of electron sources by orders of magnitude. In addition, at very high fields (>109 V/m ), field emission and photo-field emission produce very high current density. Arrays of needles can be used to achieve high total current.

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