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:
Aug. 29, 1978
Filed:
Feb. 15, 1977
Guy Azam, Buc, FR;
Claude Perraudin, Buc, FR;
CGR-MeV, Paris, FR;
Abstract
A device for furnishing a scanning beam intended for irradiating a target, the irradiating dose level having a predetermined distribution on the target. The device comprises a main magnetic system having a plurality of polepieces for scanning the charged particle beam and a secondary magnetic system having a plurality of polepieces and being located upstream of the main magnetic system for variably offsetting the beam entering the main magnetic system. In a preferred embodiment the main and secondary magnetic systems are provided with quadripoles with respective coils which are supplied in pairs with signals S.sub.X1, S.sub.Y1, and S.sub.X2, S.sub.Y2, the signals S.sub.X1, S.sub.Y1 being for example of 'sawtooth' waveform and those S.sub.X2, S.sub.Y2 of 'squarewave' waveform. The signals may be co-phasal or in phase-opposition.