H - Electricity – 05 – H
Patent
H - Electricity
05
H
H05H 7/10 (2006.01) H05H 13/00 (2006.01)
Patent
CA 2227228
A method for sweeping a charged particle beam out of an isochronous cyclotron (1) comprising a solenoid forming a magnetic circuit that includes at least a number of sectors (3, 3') known as 'ridges' where the air-gap is reduced, and separated by sector-shaped spaces (4) known as 'valleys' where the air-gap is larger. According to the sweeping method, the particle beam is swept without using a sweeping device as the magnetic field has a special arrangement produced by designing the solenoid air-gap at the ridges (3, 3') of the isochronous cyclotron in such a way that the aspect ratio between the solenoid air-gap at the ridges in the region of the maximum radius, and the radius gain per turn of the particles accelerated by the cyclotron at said radius is less than 20.
Méthode d'extraction d'un faisceau de particules chargées hors d'un cyclotron isochrone (1) comportant un électro-aimant constituant le circuit magnétique qui inclut au moins un certain nombre de secteurs (3, 3') appelés "collines" où l'entrefer est réduit, séparés par des espaces en forme de secteurs (4) appelés "vallées" où l'entrefer est de dimension plus grande, la méthode d'extraction étant caractérisée par le fait que le faisceau de particules est extrait sans recours à un dispositif d'extraction par une disposition particulière du champ magnétique obtenue en dessinant l'entrefer de l'aimant aux collines (3, 3') du cyclotron isochrone de telle sorte que le rapport dimension de l'entrefer de l'aimant aux collines au voisinage du rayon maximum sur le gain en rayon par tour des particules accélérées par le cyclotron à ce rayon soit inférieur à 20.
Gowling Lafleur Henderson Llp
Ion Beam Applications S.a.
LandOfFree
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