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Electric conduction
Thermionic emission. Richardson equation
density of electron current emitted by hot cathode
j =
A/m
2
x
A/m
2
kA/m
2
MA/m
2
A/cm
2
A/mm
2
Richardson constant
B =
A/(m
2
·K
2
)
x
A/(m
2
·K
2
)
temperature of cathode
T =
K
x
μK
mK
K
kK
MK
work function of cathode material
A =
J
x
mJ
J
kJ
MJ
GJ
TJ
Boltzmann constant
k =
1.381E-23
J/K
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"
