The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 1976
Filed:
Nov. 11, 1974
Applicant:
Inventors:
William P Robinson, Austin, TX (US);
Robert L Seliger, Agoura, CA (US);
Assignee:
Accelerators, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
250423 ; 3151113 ;
Abstract
A well-formed ion beam having a high current is extracted from an ion plasma by a low perveance ion extraction system including focus and extraction electrodes, the extraction electrode having an ion exit aperture and being axially spaced from the focus electrode a distance of at least several times the diameter of the ion exit aperture. A voltage differential is applied between the electrodes to define a plasma sheath at the ion source aperture, and the ion beam is extracted from the plasma sheath.