English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The problem of saturat ing a particular configuration of space with electrons is consid ered. It is shown that with unipotential guns of axial symmetry derived from space charge limited diodes t here exist both a minimum energy and a maximum widLh-Lo-lengLh ratio of the space that can be saturated. These limi Ls arc derived for the case of convergent flow between concen tric sp heres. Similar limits for partia l saturation of t he space are derived for cases of convergent, parallel, and divergent flow.

Limitations on electron beam density of unipotential electron guns at low voltages