Consider an infinitely long cylindrical electron beam. The electrons are travelling upward along the z-axis. The beam current is I = 100 ?A and the electron energy is E = 10 keV (we consider that the electrons have no transverse velocities). The electron beam has a radius r ₀ = 1 mm and the electron density profile follows: 1. Express the density n ₀ as a function of I, E, r ₀ and the elementary charge e.

2. Calculate n ₀

3. Express the drift velocity V _d of the electrons as a function of I, E, r ₀ and the elementary charge e.

4. Calculate V _d

Transcribed Image Text:

n(r) = no. T≤ TO. 0, T> To- (1) n(r) = no. T≤ TO. 0, T> To- (1)

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1 Energy is of the electron is The current density is U... View the full answer