periodic field focusing

periodic field focusing

[¦pir·ē¦äd·ik ′fēld ‚fō·kə·siŋ]
(electronics)
Focusing of an electron beam where the electrons follow a trochoidal path and the focusing field interacts with them at selected points.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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