Fig 4 - uploaded by S. V. Anishchenko
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Comparison of momentum spread for cases (a), (b1), and (b2) at h = 1.5 cm, Ra = 15 cm, and Rc − rc = 1 cm.
Source publication
The electron beam dynamics in a nonmagnetized high-current vacuum diode is analyzed for different cathode-anode gap geometries. The conditions enabling to achieve the minimal {initial} momentum spread in the electron beam are found out. A drastic rise of current density in a vacuum diode with a ring-type cathode is described. The effect is shown to...
Context in source publication
Context 1
... analysis of case (b2) gives a recipe for reducing the mo- mentum spread at small r c /h ratios for a finite-size cathode: an increase in the cathode brim (the difference (R c − r c )) enables the transition from case (b1) to case (a). In the (Fig.4), the momentum spread for a finite- size cathode at h = 1.5 cm, R a = 15 cm, and R c − r c ∼ 1 cm coincides with that for infinite-size cathode. ...
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