Figure 4
(click on image for figure alone)
Fig. 4. A 100 eV electron beam injected perpendicular to a dc
magnetic field. The sense of the cyclotron orbit implies that
the magnetic field points into the plane. From the beam energy
and the cyclotron radius the field strength can be calculated.
Note that the beam light weakens with propagation distance
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Last Revision: 25 January 2000.