Varian Medical Systems Technologies, Inc.

Arthur Salop

David H Whittum

Mark Everett Trail

Gard Edson Meddaugh

Michael A Kauffman

A method for generating an electron beam includes prescribing a location, and generating an envelope of electrons, the envelope having a waist, wherein the generating is performed such that the waist of the envelope is at or adjacent to the prescribed location. A device for generating an electron beam includes a gun source for generating electrons, and a plurality of electromagnetic cavities coupled in series to form a body, the electromagnetic cavities configured to accelerate at least some of the electrons to create a beam of electrons at an energy level having a value between 5 MeV and 20 MeV, the beam of electrons having a cross sectional dimension that is 0.02 &#x3bb; (or 2 mm) or less.

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Palo Alto, CA, United States of America

Arthur Salop