. The Bell System technical journal . hey have been deflected by the veloc-ity modulation. This general type of diagram has been popularized in this country by the\arians, and their associates under the name Applegate diagram, the onlydifference being an interchange of axis. Figure 5, taken from a recent paperby Dr. A. E. Harrison, illustrates this version of the Bruche and Recknageldiagram. Now if instead of judging the current density by the density of the lineson the diagram, we make a plot of the current density as a function of timefor different fixed distances from the input gap, the pic
. The Bell System technical journal . hey have been deflected by the veloc-ity modulation. This general type of diagram has been popularized in this country by the\arians, and their associates under the name Applegate diagram, the onlydifference being an interchange of axis. Figure 5, taken from a recent paperby Dr. A. E. Harrison, illustrates this version of the Bruche and Recknageldiagram. Now if instead of judging the current density by the density of the lineson the diagram, we make a plot of the current density as a function of timefor different fixed distances from the input gap, the pictures are somewhat asshown on Fig. 6. Figure 7 represents a plot presented by Kompfner andcombines in one illustration the type of presentation used by Tombs. 338 BELL SYSTEM TECHNICAL JOURNALPhase Focusing in a Reflex Tube It might be well to pause for a moment in our discussion of transit timebunching to consider how the phase focusing diagrams can be applied to areflex tube. The elements of a modern reflex tube are shown in Fig. 8. I
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