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:
Jan. 14, 2003
Filed:
Jul. 26, 2000
Applicant:
Inventors:
Dennis L. Tilley, Redmond, WA (US);
David Q. King, Woodinville, WA (US);
Assignee:
Aerojet-General Corporation, Redmond, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05H 1/54 ; H01J 2/702 ;
U.S. Cl.
CPC ...
H05H 1/54 ; H01J 2/702 ;
Abstract
A series of long slats, preferably parallel and spaced apart uniformly, extend from a base plate to form a series of cavities between the slats for trapping high energy ions in the exit plume of an ion accelerator. The plume shield is designed to minimize escape of ions and sputtered atoms from the shield. The effectiveness of the shield in trapping and retarding ions and sputtered atoms can be accomplished by biasing the potential of the shield with respect to an adjacent structure and by inducing a magnetic field parallel to a target area of the shield, which can limit electron current to the target area.