Derive the Richardson-Deshman formula that determines the current density of electrons emitted by the thermionic cathode J = AT2exp(-j/kBT), where the constant A = 4пmekB2/h3 = 120 • 104 A/(m2K2). The value j is the work function, which depends on the cathode material and on the state of the surface of the material and is usually expressed in eV.
Detailed solution. Format gif
No feedback yet