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28.2: Analysis Of Electron‐Gun Focus Tracking Using Emittance Techniques
Author(s) -
New David A.
Publication year - 1998
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1833782
Subject(s) - triode , thermal emittance , focus (optics) , electron gun , tracking (education) , lens (geology) , beam (structure) , optics , computer science , voltage , cathode ray , engineering , physics , electrical engineering , electron , nuclear physics , psychology , pedagogy , capacitor
Emittance techniques are extended and applied to the problem of focus‐tracking — the variation of focus voltage with beam current. The resulting tool isolates and quantifies contributions to tracking, provides guidance on beneficial modifications in the triode and lens regions, and enables gun engineers to achieve designs with improved overall performance.