Magnetic lens

QuickField simulation example

Magnetic lens is used for electron beams focusing.

Problem Type
Axisymmetric problem of DC magnetics.

Geometry

Given
Relative permittivity of vacuum ε = 1;
Coil current I = 10 A.
Relative permeability of the core μ = 1000;
Charge (electron) q = -1.602e-19 C
Mass (electron) m = 9.109e-31 kg
Initial velocity v_y = 300 km/s, v_z = 1000 km/s.

Task
Calculate the charged particle trajectory.

Solution
Particle trajectory may be calculated using the free tool TrajectoryTracer.

Results
Final velocity v_y = 2.2 km/s, v_z = 1000 km/s.

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