EP0853867A1 - Method for sweeping charged particles out of an isochronous cyclotron, and device therefor - Google Patents
Method for sweeping charged particles out of an isochronous cyclotron, and device thereforInfo
- Publication number
- EP0853867A1 EP0853867A1 EP96931694A EP96931694A EP0853867A1 EP 0853867 A1 EP0853867 A1 EP 0853867A1 EP 96931694 A EP96931694 A EP 96931694A EP 96931694 A EP96931694 A EP 96931694A EP 0853867 A1 EP0853867 A1 EP 0853867A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cyclotron
- hills
- air gap
- radius
- sectors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H13/00—Magnetic resonance accelerators; Cyclotrons
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/10—Arrangements for ejecting particles from orbits
Definitions
- the present invention relates -: ⁇ sc, oier. to compact isochronous cyclotrons than to cvc-otrcr.s focused by sectors. Likewise, the present invention relates to isochronous cyclotrons known as superconductive or non-superconductive.
- isochronous cyclotrons which are energized by at least one main circular coil, and so-called separate sector cyclotrons, where the magnetic structure is divided into separate fully autonomous units.
- the present invention relates to a method of extracting charged particles from an isochronous cyclotron comprising an electromagnet constituting the magnetic circuit which includes a certain number of pairs of sectors called “hills” where the air gap is reduced, separated by spaces in the form of sectors called “valleys” where the air gap is larger; this method being characterized by the fact that an isochronous cyclotron is produced with a magnet gap between the hills, the dimensions of which are chosen so that the minimum value of this gap in the vicinity of the maximum radius between the hills is less than twenty times the gain in radius per revolution of the particles accelerated by the cyclotron at this radius.
- the angle of one of the sectors is reduced at the polar radius to allow the orbits to be displaced and thus obtain the extraction of the entire beam on this side. , so, for example, to be able to irradiate a large volume target.
- a particular distribution of the particle beam is carried out so as to simultaneously irradiate several targets mounted side by side on the beam path.
- the present invention advantageously allows it to be used for proton therapy or the production of radioisotopes, and more particularly of radioisotopes intended for positron emission tomography (PET).
- PET positron emission tomography
- the profile of the magnetic field in an isochronous cyclotron is such that the frequency of rotation of the particles must be constant and independent of their energy. To compensate for the relativistic increase in mass of the particles, the magnetic field must therefore increase with the radius to ensure this condition of isochronism.
- the central duct is intended to receive at least part of the source of particles 7 to be accelerated. These particles are injected into the center of the device by means known per se.
- the magnet is designed, according to the present invention, with a 10 mm air gap for a magnetic field of 2 teslas on the magnetic sectors 3 and 3 ' .
- the accelerating voltage is 80 kilovolts so as to obtain a radius gain of 1.5 mm at the maximum radius.
- the angle of one of the sectors is reduced at the level of the polar radius so as to allow the orbits to be displaced and the entire beam to be extracted on this side (see FIG. 4 ).
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Particle Accelerators (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9500832A BE1009669A3 (en) | 1995-10-06 | 1995-10-06 | Method of extraction out of a charged particle isochronous cyclotron and device applying this method. |
BE9500832 | 1995-10-06 | ||
PCT/BE1996/000101 WO1997014279A1 (en) | 1995-10-06 | 1996-09-25 | Method for sweeping charged particles out of an isochronous cyclotron, and device therefor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0853867A1 true EP0853867A1 (en) | 1998-07-22 |
EP0853867B1 EP0853867B1 (en) | 1999-07-28 |
Family
ID=3889224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96931694A Expired - Lifetime EP0853867B1 (en) | 1995-10-06 | 1996-09-25 | Method for sweeping charged particles out of an isochronous cyclotron, and device therefor |
Country Status (9)
Country | Link |
---|---|
US (1) | US6057655A (en) |
EP (1) | EP0853867B1 (en) |
JP (1) | JP4008030B2 (en) |
AT (1) | ATE182739T1 (en) |
BE (1) | BE1009669A3 (en) |
DE (1) | DE69603497T2 (en) |
ES (1) | ES2135918T3 (en) |
GR (1) | GR3031392T3 (en) |
WO (1) | WO1997014279A1 (en) |
Cited By (3)
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US6683426B1 (en) | 1999-07-13 | 2004-01-27 | Ion Beam Applications S.A. | Isochronous cyclotron and method of extraction of charged particles from such cyclotron |
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EP2129193A1 (en) | 2008-05-30 | 2009-12-02 | Ion Beam Applications S.A. | A stripping member, a stripping assembly and a method for extracting a particle beam from a cyclotron |
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-
1996
- 1996-09-25 EP EP96931694A patent/EP0853867B1/en not_active Expired - Lifetime
- 1996-09-25 US US09/051,306 patent/US6057655A/en not_active Expired - Lifetime
- 1996-09-25 DE DE69603497T patent/DE69603497T2/en not_active Expired - Lifetime
- 1996-09-25 AT AT96931694T patent/ATE182739T1/en active
- 1996-09-25 WO PCT/BE1996/000101 patent/WO1997014279A1/en active IP Right Grant
- 1996-09-25 JP JP51457797A patent/JP4008030B2/en not_active Expired - Fee Related
- 1996-09-25 ES ES96931694T patent/ES2135918T3/en not_active Expired - Lifetime
-
1999
- 1999-09-30 GR GR990402483T patent/GR3031392T3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9714279A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6683426B1 (en) | 1999-07-13 | 2004-01-27 | Ion Beam Applications S.A. | Isochronous cyclotron and method of extraction of charged particles from such cyclotron |
EP1385362A1 (en) * | 2002-07-22 | 2004-01-28 | Ion Beam Applications S.A. | Cyclotron provided with new particle beam sweeping means |
WO2004010748A1 (en) * | 2002-07-22 | 2004-01-29 | Ion Beam Applications S.A. | Cyclotron equipped with novel particle beam deflecting means |
EP2129193A1 (en) | 2008-05-30 | 2009-12-02 | Ion Beam Applications S.A. | A stripping member, a stripping assembly and a method for extracting a particle beam from a cyclotron |
Also Published As
Publication number | Publication date |
---|---|
GR3031392T3 (en) | 2000-01-31 |
ES2135918T3 (en) | 1999-11-01 |
BE1009669A3 (en) | 1997-06-03 |
ATE182739T1 (en) | 1999-08-15 |
US6057655A (en) | 2000-05-02 |
WO1997014279A1 (en) | 1997-04-17 |
EP0853867B1 (en) | 1999-07-28 |
DE69603497T2 (en) | 2000-02-03 |
DE69603497D1 (en) | 1999-09-02 |
JPH11513528A (en) | 1999-11-16 |
JP4008030B2 (en) | 2007-11-14 |
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