electrostatic quadrupole lens

electrostatic quadrupole lens

[i′lek·trə‚stad·ik ¦kwä·drə‚pōl ′lenz]
(electronics)
A device for focusing beams of electrons or other charged particles, consisting of four electrodes arranged in a circular pattern with alternating polarities.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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