EP 3244710 B1 20180905 - COMPACT CYCLOTRON
Title (en)
COMPACT CYCLOTRON
Title (de)
KOMPAKTES ZYKLOTRON
Title (fr)
CYCLOTRON COMPACT
Publication
Application
Priority
EP 16169497 A 20160513
Abstract (en)
[origin: EP3244710A1] The present invention concerns compact isochronous sector-focused cyclotrons having reduced dimensions and weight compared with state of the art cyclotrons of same energies. A cyclotron according to the present invention two pole magnets 2 facing each other in a chamber defined by a yoke comprising base plates 5 and flux return yokes 6 forming a lateral wall of the chamber. The magnet poles comprise N = 3 to 8 hill sectors 3 alternating with a same number of valley sectors 4 distributed about a central axis, Z. The valley sectors comprise a bottom surface 4B, defined by a valley peripheral edge 4vp and provided with an abyssal opening 11, extending through a thickness of the base plates. The lip of the abyssal opening is positioned at a distance, Lap, of the corresponding valley peripheral edge. The flux return yoke 6 has a thickness, Tv, in the portions facing valley sectors, such that the ratio, (Lap x Tv) / Lv 2 , of the product of the distance, Lap, of the abyss perimeter to the valley peripheral edge of each valley sector times the flux return yoke thickness, Tv, to the square of the distance, Lv, of the peripheral edge to the central axis, Z, is less than 5%, wherein each of Lap, Tv, and Lv are measured along an abyss radial axis, Lar. This allows more compact and lighter cyclotrons to be produced than hitherto available.
IPC 8 full level
H05H 7/04 (2006.01); H05H 13/00 (2006.01)
CPC (source: CN EP)
H05H 7/04 (2013.01 - CN EP); H05H 13/005 (2013.01 - CN EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3244710 A1 20171115; EP 3244710 B1 20180905; CA 2965643 A1 20170713; CA 2965643 C 20180220; CN 107371319 A 20171121; CN 107371319 B 20190510; CN 207083269 U 20180309; JP 2017204470 A 20171116; JP 6249542 B2 20171220
DOCDB simple family (application)
EP 16169497 A 20160513; CA 2965643 A 20170501; CN 201710324759 A 20170510; CN 201720516995 U 20170510; JP 2017093673 A 20170510