Fermi-Dirac Statistics: Thermionic Emission from a Metal

Control console

At a fixed filament current, sweep the anode voltage and record the anode current.

Cathode

Filament current

Anode voltage

pwrmeasfault

Select the cathode and set the filament current. Record the filament resistance and deduce the temperature.
Sweep the anode voltage from 1 V to 300 V, recording the current.
Plot log I against log V and identify the region of gradient 3/2.
Identify the onset of saturation and comment on how it moves with filament temperature.

standby

No readings on this channel yet. Set the controls and press Read electrometer.

A fresh page. Take your first reading and it will be entered here.

Take at least one reading to plot.