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:
Jul. 09, 1991
Filed:
Aug. 22, 1989
Applicant:
Inventor:
Andrew J Holmes, Abingdon, GB;
Assignee:
United Kingdom Atomic Energy Authority, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05H / ;
U.S. Cl.
CPC ...
31511131 ; 31511121 ; 31511141 ; 31511181 ; 31323131 ; 2504 / ;
Abstract
A plasma source of charged particles includes a particle extraction control device consisting of an electrode having an exit hole in it and a planar solenoid arranged to produce, when energized, a magnetic field across the exit hole in the electrode, the magnitude of the magnetic field and potentials applied to extraction electrodes being variable so as to enable different charged particles to be emitted by the source.