Field emission cathode array development for high-current-density applications

1983 ◽  
Vol 16 (1-2) ◽  
pp. 268-276 ◽  
Author(s):  
Charles A. Spindt ◽  
Christopher E. Holland ◽  
Robert D. Stowell
Keyword(s):  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Field Emission Cathode ◽  
Emission Cathode

A carbon nanotube field emission cathode with high current density and long-term stability

2009 ◽  
Vol 20 (32) ◽  
pp. 325707 ◽  
Author(s):  
Xiomara Calderón-Colón ◽  
Huaizhi Geng ◽  
Bo Gao ◽  
Lei An ◽  
Guohua Cao ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Field Emission Cathode ◽  
Term Stability ◽  
Long Term Stability ◽  
Emission Cathode

Graphene Nanotubule Cold Field Emission Electron Sources

1994 ◽  
Vol 349 ◽  
Author(s):  
B. H. Fishbine ◽  
C. J. Miglionico ◽  
K. E. Hackett ◽  
K. J. Hendricks
Keyword(s):  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Field Emitter ◽  
Electron Sources ◽  
Field Emitter Arrays ◽  
Emission Electron ◽  
Emitter Array ◽  
Field Emitter Array

ABSTRACTBuckytubes are considered for high current density cold field emitter array electron sources. They may provide more stable, higher-brightness emission than existing cold field emitter arrays.

Formation of extremely high current density LaB6 field emission arrays via e-beam deposition

2008 ◽  
Vol 93 (9) ◽  
pp. 093503 ◽  
Author(s):  
K. C. Qi ◽  
Z. L. Lin ◽  
W. B. Chen ◽  
G. C. Cao ◽  
J. B. Cheng ◽  
...  
Keyword(s):  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Field Emission Arrays ◽  
Beam Deposition

Noise and energy broadening in field emission systems

1978 ◽  
Vol 36 (1) ◽  
pp. 56-57 ◽  
Author(s):  
K.C.A. Smith ◽  
A.D.G. Cumming
Keyword(s):  
Field Emission ◽  
Axial Magnetic Field ◽  
Chromatic Aberration ◽  
Electron Gun ◽  
High Current ◽  
Field Emission Cathode ◽  
Transmission Microscopy ◽  
Control Electrode ◽  
Tip Radius ◽  
Emission Cathode

To improve the performance of the field emission electron gun requires that greater total currents are drawn from the field emission cathode. This involves various practical difficulties associated with the vacuum environment, and in addition, the Boersch effect energy broadening may become important at high currents and for certain applications, for example in pulsed transmission microscopy (Smith and Cleaver, 1976). As part of a study of field emission guns under high current conditions we have measured the energy spreads in a pulsed triode gun system. Positive going pulses on the control electrode, or Wehnelt, were used to draw peak currents of up to 2 mA for 10 μS durations, the pulses being of 4 kV amplitude. A (111) orientated single crystal tungsten cathode was used, of 150 mm tip radius, and the energy of the emitted electrons measured in an analyser due to Brack (1962). This consists of a three electrode einzel lens with a superimposed axial magnetic field, and is designed to have a high coefficient of chromatic aberration.

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