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. 05, 2010
Filed:
Mar. 10, 2006
Oswald Willi, Duesseldorf, DE;
Julien Fuchs, Paris, FR;
Marco Borghesi, North Ireland, GB;
Toma Toncian, Duesseldorf, DE;
Oswald Willi, Duesseldorf, DE;
Julien Fuchs, Paris, FR;
Marco Borghesi, North Ireland, GB;
Toma Toncian, Duesseldorf, DE;
Heinrich-Heine Universitaet Duesseldorf, Duesseldorf, FR;
Université Pierre and Marie Curie (UPMC), Paris, FR;
The Queen's University of Belfast, Belfast, GB;
The Centre National de la Recherche Scientifique, Paris, FR;
Ecole Polytechnique, Palaiseaux, FR;
Abstract
The present invention concerns a system for the focusing and/or a collimation of an ion beam, in particular a beam of accelerated protons, wherein the system has a lens with a lens body that is permeable to the ion beam, wherein means for the generation of an in particular electrostatic field, propagating within the lens body and focusing the ion beam, are provided, wherein the lens body has a wall of low thickness, wherein the means for the field generation comprise a source of electromagnetic radiation, whose emitted beam is directed onto the outer side of the wall of the lens body, wherein the thickness of the wall and the quality of the electromagnetic radiation is chosen such that the radiation generates free electrons that emerge from the wall and accumulate on the exit side of the wall in an electron cloud.