Space Charge Limited Current Applet

Calculate: Current Output Format Notes

## Equation

## Parameters

## Diagram

## Notes: top-
Source: NRL Plasma Formulary -
This is for non-relativistic electron emission and transport in vacuum. -
Assumes no ions (ions generally increase electron current 100% (half impedance), but are a small fraction of total current) -
Effective area can be spreading of the electron source. -
According to Bruce Weber (NRL), this equation only works up to about 500kV. Above this, replace the 2.34 with 2.00 in the coefficient and the 3/2 with 4/3 in the exponent for a better fit.
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